首页 > 最新文献

Multidiscipline Modeling in Materials and Structures最新文献

英文 中文
The research of buckling and post-buckling behavior of bidirectional stiffened composite panel under discrete impact 离散冲击下双向加筋复合材料板的屈曲及后屈曲行为研究
IF 2 4区 材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY Pub Date : 2023-02-28 DOI: 10.1108/mmms-11-2022-0255
Hai-Ning Hu, Yu Wang, Chenchen Lian, PeiYan Wang
PurposeIn this paper, an attempt is made to obtain buckling loads, ultimate bearing capacity and other required structural characteristics of grid structure panels. The numerical method for post-buckling behavior analysis of panels involving multiple invisible damages is also presented.Design/methodology/approachIn this paper, two bidirectional stiffened composite panels are manufactured and tested. Multiple discrete invisible damages are introduced in different positions of the stringers, and the experimental and simulation investigation of buckling and post-buckling were carried out on the damaged stiffened panels.FindingsThe simulation load–displacement curves are compared with the experimental results, and it is found that the simulation model can well predict the occurrence of buckling and failure loads. The strain curve shows that the rate of strain change at the damaged site is greater than that at the undamaged site, which reflects that the debond is more likely occurred at the damaged site. The simulation verifies that the panel is usually crushed due to matrix compression and fiber–matrix shear.Originality/valueIn this paper, post-buckling tests and numerical simulations of bidirectional stiffened composite panels with impact damage were carried out. Two panels with four longitudinal stringers and two transverse stringers were manufactured and tested. The buckling and post-buckling characteristics of the grid structure are obtained, and the failure mechanism of the structure is explained. This is helpful for the design of wall panel structure.
目的本文试图获得网架结构板的屈曲载荷、极限承载力等所需的结构特性。提出了包含多重不可见损伤的板屈曲后行为分析的数值方法。设计/方法/方法本文对两种双向加筋复合材料板进行了制造和试验。在筋板的不同位置引入多重离散的不可见损伤,并对损伤后的加筋板进行屈曲和后屈曲的实验和模拟研究。将模拟载荷-位移曲线与试验结果进行对比,发现模拟模型能较好地预测屈曲和破坏载荷的发生。应变曲线显示,损伤部位应变变化率大于未损伤部位,说明损伤部位更容易发生脱粘。仿真结果表明,板料通常是由于基体压缩和纤维-基体剪切而破碎。本文对具有冲击损伤的双向加筋复合材料板进行了后屈曲试验和数值模拟。制造并测试了两组纵向桁板和两组横向桁板。得到了网格结构的屈曲和后屈曲特性,并解释了网格结构的破坏机理。这对墙板结构的设计有一定的指导意义。
{"title":"The research of buckling and post-buckling behavior of bidirectional stiffened composite panel under discrete impact","authors":"Hai-Ning Hu, Yu Wang, Chenchen Lian, PeiYan Wang","doi":"10.1108/mmms-11-2022-0255","DOIUrl":"https://doi.org/10.1108/mmms-11-2022-0255","url":null,"abstract":"PurposeIn this paper, an attempt is made to obtain buckling loads, ultimate bearing capacity and other required structural characteristics of grid structure panels. The numerical method for post-buckling behavior analysis of panels involving multiple invisible damages is also presented.Design/methodology/approachIn this paper, two bidirectional stiffened composite panels are manufactured and tested. Multiple discrete invisible damages are introduced in different positions of the stringers, and the experimental and simulation investigation of buckling and post-buckling were carried out on the damaged stiffened panels.FindingsThe simulation load–displacement curves are compared with the experimental results, and it is found that the simulation model can well predict the occurrence of buckling and failure loads. The strain curve shows that the rate of strain change at the damaged site is greater than that at the undamaged site, which reflects that the debond is more likely occurred at the damaged site. The simulation verifies that the panel is usually crushed due to matrix compression and fiber–matrix shear.Originality/valueIn this paper, post-buckling tests and numerical simulations of bidirectional stiffened composite panels with impact damage were carried out. Two panels with four longitudinal stringers and two transverse stringers were manufactured and tested. The buckling and post-buckling characteristics of the grid structure are obtained, and the failure mechanism of the structure is explained. This is helpful for the design of wall panel structure.","PeriodicalId":46760,"journal":{"name":"Multidiscipline Modeling in Materials and Structures","volume":"1 1","pages":""},"PeriodicalIF":2.0,"publicationDate":"2023-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41656715","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Predicting hot wire tungsten inert gas welding parameters for joining P91 and 304HCu steel using multi-optimization techniques 采用多重优化技术预测P91钢与304HCu钢的热丝钨极惰性气体焊接参数
IF 2 4区 材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY Pub Date : 2023-02-28 DOI: 10.1108/mmms-10-2022-0233
S. Sravan, S. Rajakumar, Karthikeyan Rajagopalan, K. Subramanian
PurposeDissimilar joining of austenitic stainless steels and ferritic steels is a challenging task and has a wide range of applications due to its excellent mechanical and thermal characteristics. They are joined mostly by using conventional modes. In the current investigation, the study and optimization of hot wire TIG welding parameters was carried out.Design/methodology/approachThese parameters will govern the desired characteristics of the joint. Solutions were found out through multi-response optimization by using response surface methodology and single response optimization using particle swarm optimization.FindingsOptimized input welding parameters that were achieved are electrode current 180 amps, wire feed rate 1870 mm/min and hot wire current 98 amps and the optimized UTS is 665.45 MPa. The results from PSO were compared with RSM and the optimized input welding parameters for the electrode current, hot wire current and wire feed rate exhibited maximum ultimate tensile strength which were also confirmed from response and contour plots.Originality/valueSensitivity analysis was also performed to understand the effect of each individual parameters on the response. Microstructure features were evaluated for the joints and was found that the characteristics are within the desired criteria.
目的:奥氏体不锈钢与铁素体钢的异种连接是一项具有挑战性的任务,由于其优异的机械和热特性而具有广泛的应用。它们主要通过使用传统模式连接在一起。在本次研究中,对热丝TIG焊接参数进行了研究和优化。设计/方法学/方法这些参数将决定关节所需的特性。采用响应面法进行多响应优化,采用粒子群法进行单响应优化。结果:优化后的焊接输入参数为电极电流180安培,送丝速度1870 mm/min,热丝电流98安培,优化后的UTS为665.45 MPa。将PSO结果与RSM结果进行对比,优化后的焊条电流、热丝电流和送丝速度输入参数显示出最大的极限抗拉强度,并从响应图和等高线图中得到证实。独创性/价值敏感性分析也被执行,以了解每个单独的参数对反应的影响。对接头的微观组织特征进行了评估,发现其特征在期望的标准范围内。
{"title":"Predicting hot wire tungsten inert gas welding parameters for joining P91 and 304HCu steel using multi-optimization techniques","authors":"S. Sravan, S. Rajakumar, Karthikeyan Rajagopalan, K. Subramanian","doi":"10.1108/mmms-10-2022-0233","DOIUrl":"https://doi.org/10.1108/mmms-10-2022-0233","url":null,"abstract":"PurposeDissimilar joining of austenitic stainless steels and ferritic steels is a challenging task and has a wide range of applications due to its excellent mechanical and thermal characteristics. They are joined mostly by using conventional modes. In the current investigation, the study and optimization of hot wire TIG welding parameters was carried out.Design/methodology/approachThese parameters will govern the desired characteristics of the joint. Solutions were found out through multi-response optimization by using response surface methodology and single response optimization using particle swarm optimization.FindingsOptimized input welding parameters that were achieved are electrode current 180 amps, wire feed rate 1870 mm/min and hot wire current 98 amps and the optimized UTS is 665.45 MPa. The results from PSO were compared with RSM and the optimized input welding parameters for the electrode current, hot wire current and wire feed rate exhibited maximum ultimate tensile strength which were also confirmed from response and contour plots.Originality/valueSensitivity analysis was also performed to understand the effect of each individual parameters on the response. Microstructure features were evaluated for the joints and was found that the characteristics are within the desired criteria.","PeriodicalId":46760,"journal":{"name":"Multidiscipline Modeling in Materials and Structures","volume":" ","pages":""},"PeriodicalIF":2.0,"publicationDate":"2023-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43161458","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Numerical study on influence of inclination and sinusoidal heating on magneto-convection in an inclined lid-driven cavity 倾斜盖驱动腔内倾斜和正弦加热对磁对流影响的数值研究
IF 2 4区 材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY Pub Date : 2023-02-28 DOI: 10.1108/mmms-03-2022-0044
S. Sivanandam, Bhuvaneswari Marimuthu
PurposeThe numerical analysis is to scrutinize the collective effect of convective current along with the thermal energy transport in an inclined lid-driven square chamber with sine curve based temperature at the lower wall in the existence of unchanging external magnetic field. Insulation has been placed on the left and right of the box to increase the effective space volume of the shell. The thermal condition at ceiling wall is kept lower than the one on the floor.Design/methodology/approachThe finite volume method employs to discretize (non-dimensional) system of equations govern the model. The heat transfer rate is measured by adjusting various variables, such as the Richardson number Hartmann number, inclination of an enclosure.FindingsThe flow behavior of enclosure convection is more highly influenced within the natural convection when enclosure inclination varies as well as magnetic field strength. The overall heat transfer rate decreases due to increase in both the Hartmann number as well as Richardson number.Practical implicationsThe results of the present study are very useful to the cooling of electronic equipments.Social implicationsThe study model is useful to the thermal science community and modelling field.Originality/valueThis research is a novel work on mixed convection flow in an inclined chamber with sinusoidal heat source.
目的数值分析是在外磁场不变的情况下,考察下壁温度为正弦曲线的倾斜盖驱动方形室中对流的集体效应和热能传输。盒子的左右两侧都放置了隔热材料,以增加外壳的有效空间体积。天花板墙壁处的热状况保持低于地板上的热状况。设计/方法/方法有限体积法用于离散(无量纲)方程组来控制模型。传热率是通过调节各种变量来测量的,例如理查森数-哈特曼数、外壳的倾斜度。发现当外壳倾斜和磁场强度变化时,外壳对流的流动行为在自然对流中受到更大的影响。由于Hartmann数和Richardson数的增加,整体传热率降低。实际意义本研究的结果对电子设备的冷却非常有用。社会含义该研究模型对热科学界和建模领域都很有用。独创性/价值这项研究是一项关于正弦热源倾斜室内混合对流的新工作。
{"title":"Numerical study on influence of inclination and sinusoidal heating on magneto-convection in an inclined lid-driven cavity","authors":"S. Sivanandam, Bhuvaneswari Marimuthu","doi":"10.1108/mmms-03-2022-0044","DOIUrl":"https://doi.org/10.1108/mmms-03-2022-0044","url":null,"abstract":"PurposeThe numerical analysis is to scrutinize the collective effect of convective current along with the thermal energy transport in an inclined lid-driven square chamber with sine curve based temperature at the lower wall in the existence of unchanging external magnetic field. Insulation has been placed on the left and right of the box to increase the effective space volume of the shell. The thermal condition at ceiling wall is kept lower than the one on the floor.Design/methodology/approachThe finite volume method employs to discretize (non-dimensional) system of equations govern the model. The heat transfer rate is measured by adjusting various variables, such as the Richardson number Hartmann number, inclination of an enclosure.FindingsThe flow behavior of enclosure convection is more highly influenced within the natural convection when enclosure inclination varies as well as magnetic field strength. The overall heat transfer rate decreases due to increase in both the Hartmann number as well as Richardson number.Practical implicationsThe results of the present study are very useful to the cooling of electronic equipments.Social implicationsThe study model is useful to the thermal science community and modelling field.Originality/valueThis research is a novel work on mixed convection flow in an inclined chamber with sinusoidal heat source.","PeriodicalId":46760,"journal":{"name":"Multidiscipline Modeling in Materials and Structures","volume":" ","pages":""},"PeriodicalIF":2.0,"publicationDate":"2023-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45883662","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Mathematical modeling and multiresponse optimization to reduce surface roughness and adhesion in Al 5083 H116 alloys used in ammunition propulsion actuators 用于弹药推进执行器的Al 5083 H116合金表面粗糙度和附着力的数学建模和多响应优化
IF 2 4区 材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY Pub Date : 2023-02-16 DOI: 10.1108/mmms-11-2022-0237
H. Gökçe, M. A. Biberci
PurposeThis study aims to obtain the lowest surface roughness (Ra) and drill bit adhesion values (AV) depending on the change in control factors (cutting speed-Vc, feed rate-f and drill bit-D) during drilling of the Al 5083 H116 alloy. Low roughness values increase the fatigue strength of the final part and affect tribological properties such as lubrication and friction. In the machining of ductile materials, the AV increases the Ra value and negatively affects the tool life.Design/methodology/approachDrilling tests were conducted using Taguchi L16 orthogonal array. The experimental measurement findings for Ra and AV were adjusted utilizing the Grey Relational Analysis (GRA), the Response Surface Method (RSM) and Artificial Neural Networks (ANN) to generate prediction values. SEM detected drill-tip adhesions and chip morphology and they were analyzed by EDX.FindingsRa and AV increased as the f increased. Vc affects AV; 86.04% f on Ra and 54.71% Vc on AV were the most effective control parameters. After optimizing Ra and AV using GRA, the f is the most effective control factor. Vc: 120 m/min, f: 0.025 mm/rev and D2 were optimal. ANN predicted with Ra 99.6% and AV 99.8% accurately. Mathematical models are obtained with RSM. The increase in f increased AV, which had a negative effect on Ra, whereas the increase in Vc decreased the adhesion tendency. With the D1 drill bit with the highest flute length, a relatively lower Ra was measured, as it facilitates chip evacuation. In addition, the high correlations of the mathematical models obtained indicate that the models can be used safely.Originality/valueThe novelty of this study is to determine the optimum drilling parameters with GRA and ANN for drilling the necessary holes for the assembly of ammunition wing propulsion systems, especially those produced with Al 5083 H116 alloy, with rivets and bolts.
目的本研究旨在获得最低的表面粗糙度(Ra)和钻头附着力值(AV),这取决于在Al 5083 H116合金钻孔过程中控制因素(切削速度Vc、进给速率f和钻头D)的变化。低粗糙度值会增加最终零件的疲劳强度,并影响摩擦学性能,如润滑和摩擦。在加工韧性材料时,AV会增加Ra值,并对刀具寿命产生负面影响。设计/方法/方法使用田口L16正交阵列进行钻孔试验。利用灰色关联分析(GRA)、响应面法(RSM)和人工神经网络(ANN)对Ra和AV的实验测量结果进行调整,以生成预测值。扫描电镜检测了钻头尖端的粘附和切屑形态,并用EDX对其进行了分析。发现Ra和AV随着f的增加而增加。Vc影响AV;Ra的86.04%f和AV的54.71%Vc是最有效的控制参数。在使用GRA优化Ra和AV之后,f是最有效的控制因素。Vc:120m/min、f:0.025mm/rev和D2是最佳的。人工神经网络预测准确率分别为Ra99.6%和AV99.8%。用RSM得到了数学模型。f的增加增加了AV,这对Ra有负面影响,而Vc的增加降低了粘附趋势。对于具有最高槽长度的D1钻头,测量到相对较低的Ra,因为这有利于排屑。此外,所获得的数学模型的高相关性表明,这些模型可以安全地使用。独创性/价值本研究的新颖性在于用GRA和ANN确定最佳钻孔参数,以便为弹药翼推进系统的组装钻孔,特别是用Al 5083 H116合金生产的带有铆钉和螺栓的弹药翼推进设备。
{"title":"Mathematical modeling and multiresponse optimization to reduce surface roughness and adhesion in Al 5083 H116 alloys used in ammunition propulsion actuators","authors":"H. Gökçe, M. A. Biberci","doi":"10.1108/mmms-11-2022-0237","DOIUrl":"https://doi.org/10.1108/mmms-11-2022-0237","url":null,"abstract":"PurposeThis study aims to obtain the lowest surface roughness (Ra) and drill bit adhesion values (AV) depending on the change in control factors (cutting speed-Vc, feed rate-f and drill bit-D) during drilling of the Al 5083 H116 alloy. Low roughness values increase the fatigue strength of the final part and affect tribological properties such as lubrication and friction. In the machining of ductile materials, the AV increases the Ra value and negatively affects the tool life.Design/methodology/approachDrilling tests were conducted using Taguchi L16 orthogonal array. The experimental measurement findings for Ra and AV were adjusted utilizing the Grey Relational Analysis (GRA), the Response Surface Method (RSM) and Artificial Neural Networks (ANN) to generate prediction values. SEM detected drill-tip adhesions and chip morphology and they were analyzed by EDX.FindingsRa and AV increased as the f increased. Vc affects AV; 86.04% f on Ra and 54.71% Vc on AV were the most effective control parameters. After optimizing Ra and AV using GRA, the f is the most effective control factor. Vc: 120 m/min, f: 0.025 mm/rev and D2 were optimal. ANN predicted with Ra 99.6% and AV 99.8% accurately. Mathematical models are obtained with RSM. The increase in f increased AV, which had a negative effect on Ra, whereas the increase in Vc decreased the adhesion tendency. With the D1 drill bit with the highest flute length, a relatively lower Ra was measured, as it facilitates chip evacuation. In addition, the high correlations of the mathematical models obtained indicate that the models can be used safely.Originality/valueThe novelty of this study is to determine the optimum drilling parameters with GRA and ANN for drilling the necessary holes for the assembly of ammunition wing propulsion systems, especially those produced with Al 5083 H116 alloy, with rivets and bolts.","PeriodicalId":46760,"journal":{"name":"Multidiscipline Modeling in Materials and Structures","volume":" ","pages":""},"PeriodicalIF":2.0,"publicationDate":"2023-02-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42557851","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Distribution of strong input energy in base-isolated structures with complex nonlinearity: a parametric assessment 具有复杂非线性的基础隔离结构中强输入能量的分布:参数化评估
IF 2 4区 材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY Pub Date : 2023-02-01 DOI: 10.1108/mmms-08-2022-0158
A. Habib, U. Yildirim
PurposeOver the past few decades, several base isolation systems have been developed to enhance the performance of structures under extreme earthquake shaking intensities. Recently, to achieve high energy dissipation capabilities, a new generation of multi-stage friction pendulum (FP) bearings known as the “Quintuple Friction Pendulum (QFP)” was introduced in the literature. With the help of its five effective pendula and nine operational regimes, this bearing's major benefits stem from its ability to accomplish complicated multi-stage adaptive behavior with smoothed loading and unloading when subjected to lateral forces.Design/methodology/approachWithin the assessment context, five finite element models of reinforced concrete frames supported on QFP isolators with different properties will be developed in OpenSees. Thereafter, a set of 60 earthquakes will be analyzed using the nonlinear time history analysis approach, and the impact of each ground motion record's properties will be evaluated.FindingsOverall, the study's findings have demonstrated that the characteristics of the isolator, combined with the type of earthquake being applied, have a substantial impact on the isolator's behavior.Originality/valueCurrently, no studies have examined the energy distribution of structural systems equipped with this type of isolation system while considering the influence of earthquake characteristics. Thus, this study is intended to extend the findings available in the literature by discussing and illustrating the distribution of strong ground motions input energy into highly nonlinear base-isolated systems that account for the bearing and superstructural materials' nonlinearity, geometric nonlinearity and leakage-prevented viscous damping nonlinearity. Besides, it investigates the influence of various earthquake characteristics on the energy dissipation of such buildings.
在过去的几十年里,已经开发了几种基础隔震系统,以提高结构在极端地震震动强度下的性能。最近,为了实现高能量耗散能力,新一代多级摩擦摆(FP)轴承被称为“五重摩擦摆(QFP)”,在文献中被引入。在5个有效摆和9个操作机制的帮助下,该轴承的主要优势在于,当受到侧向力时,它能够完成复杂的多级自适应行为,并实现平滑的加载和卸载。设计/方法/方法在评估背景下,将在OpenSees中开发具有不同性能的QFP隔振器支撑的钢筋混凝土框架的五个有限元模型。随后,将使用非线性时程分析方法对60次地震进行分析,并评估每个地震动记录的性质对地震的影响。总的来说,这项研究的发现表明,隔离器的特性,结合所应用的地震类型,对隔离器的行为有实质性的影响。目前,还没有研究在考虑地震特征影响的情况下,对配置此类隔震系统的结构体系的能量分布进行研究。因此,本研究旨在通过讨论和说明强地面运动输入能量到高度非线性基础隔离系统的分布来扩展文献中的发现,该系统考虑了轴承和上部结构材料的非线性、几何非线性和防止泄漏的粘性阻尼非线性。此外,还研究了各种地震特征对此类建筑耗能的影响。
{"title":"Distribution of strong input energy in base-isolated structures with complex nonlinearity: a parametric assessment","authors":"A. Habib, U. Yildirim","doi":"10.1108/mmms-08-2022-0158","DOIUrl":"https://doi.org/10.1108/mmms-08-2022-0158","url":null,"abstract":"PurposeOver the past few decades, several base isolation systems have been developed to enhance the performance of structures under extreme earthquake shaking intensities. Recently, to achieve high energy dissipation capabilities, a new generation of multi-stage friction pendulum (FP) bearings known as the “Quintuple Friction Pendulum (QFP)” was introduced in the literature. With the help of its five effective pendula and nine operational regimes, this bearing's major benefits stem from its ability to accomplish complicated multi-stage adaptive behavior with smoothed loading and unloading when subjected to lateral forces.Design/methodology/approachWithin the assessment context, five finite element models of reinforced concrete frames supported on QFP isolators with different properties will be developed in OpenSees. Thereafter, a set of 60 earthquakes will be analyzed using the nonlinear time history analysis approach, and the impact of each ground motion record's properties will be evaluated.FindingsOverall, the study's findings have demonstrated that the characteristics of the isolator, combined with the type of earthquake being applied, have a substantial impact on the isolator's behavior.Originality/valueCurrently, no studies have examined the energy distribution of structural systems equipped with this type of isolation system while considering the influence of earthquake characteristics. Thus, this study is intended to extend the findings available in the literature by discussing and illustrating the distribution of strong ground motions input energy into highly nonlinear base-isolated systems that account for the bearing and superstructural materials' nonlinearity, geometric nonlinearity and leakage-prevented viscous damping nonlinearity. Besides, it investigates the influence of various earthquake characteristics on the energy dissipation of such buildings.","PeriodicalId":46760,"journal":{"name":"Multidiscipline Modeling in Materials and Structures","volume":" ","pages":""},"PeriodicalIF":2.0,"publicationDate":"2023-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46399565","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Limit angular speed analysis of porous functionally graded rotating disk under thermo-mechanical loading 热机械载荷作用下多孔功能梯度转盘的极限角速度分析
IF 2 4区 材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY Pub Date : 2023-01-26 DOI: 10.1108/mmms-09-2022-0197
Royal Madan, Shubhankar Bhowmick, L. Hadji, A. Alnujaie
PurposeIn this work, the effect of porosity volume fraction, porosity types, material grading index, variable disk profiles and aspect ratio on disk performance was studied by performing limit elastic speed analysis of functionally graded porous rotating disks (PFGM) under thermo-mechanical loading.Design/methodology/approachThe composition change was varied by employing the power law function. The thermo-mechanical properties of PFGM such as Young's modulus and yield strength were estimated using modified rule of mixture, for density and coefficient of thermal expansion rule of mixture was used. The even and uneven distribution of porosity in a disk was taken as uniform, symmetrical, inner maximum and outer maximum. The problem was then solved with the help of the variational principle and Galerkin's error minimization theory.FindingsThe research reveals that the grading parameter, disk geometry and porosity distribution have a significant impact on the limit elastic speed in comparison to the aspect ratio.Practical implicationsThe study determines a range of operable speeds for porous and non-porous disk profiles that the industry can utilize to estimate structural performance.Originality/valueA finite element investigation was conducted to validate the findings of the present study. Limit elastic analysis of porous FG disks under thermo-mechanical loading has not been studied before.
目的通过对功能梯度多孔旋转圆盘(PFGM)在热机械载荷作用下的极限弹性速度分析,研究了孔隙率体积分数、孔隙率类型、材料分级指数、可变圆盘轮廓和纵横比对圆盘性能的影响。设计/方法/方法通过使用幂律函数来改变成分变化。根据混合物的密度和热膨胀系数的修正规则,估算了PFGM的热机械性能,如杨氏模量和屈服强度。将圆盘中孔隙率的均匀和不均匀分布视为均匀、对称、内最大值和外最大值。然后利用变分原理和伽辽金误差最小化理论对该问题进行了求解。研究表明,与纵横比相比,级配参数、圆盘几何形状和孔隙率分布对极限弹性速度有显著影响。实际意义该研究确定了多孔和非多孔圆盘剖面的一系列可操作速度,工业界可以利用这些速度来估计结构性能。原创性/价值进行了有限元调查,以验证本研究的结果。多孔FG圆盘在热-机械载荷作用下的极限弹性分析以前没有进行过研究。
{"title":"Limit angular speed analysis of porous functionally graded rotating disk under thermo-mechanical loading","authors":"Royal Madan, Shubhankar Bhowmick, L. Hadji, A. Alnujaie","doi":"10.1108/mmms-09-2022-0197","DOIUrl":"https://doi.org/10.1108/mmms-09-2022-0197","url":null,"abstract":"PurposeIn this work, the effect of porosity volume fraction, porosity types, material grading index, variable disk profiles and aspect ratio on disk performance was studied by performing limit elastic speed analysis of functionally graded porous rotating disks (PFGM) under thermo-mechanical loading.Design/methodology/approachThe composition change was varied by employing the power law function. The thermo-mechanical properties of PFGM such as Young's modulus and yield strength were estimated using modified rule of mixture, for density and coefficient of thermal expansion rule of mixture was used. The even and uneven distribution of porosity in a disk was taken as uniform, symmetrical, inner maximum and outer maximum. The problem was then solved with the help of the variational principle and Galerkin's error minimization theory.FindingsThe research reveals that the grading parameter, disk geometry and porosity distribution have a significant impact on the limit elastic speed in comparison to the aspect ratio.Practical implicationsThe study determines a range of operable speeds for porous and non-porous disk profiles that the industry can utilize to estimate structural performance.Originality/valueA finite element investigation was conducted to validate the findings of the present study. Limit elastic analysis of porous FG disks under thermo-mechanical loading has not been studied before.","PeriodicalId":46760,"journal":{"name":"Multidiscipline Modeling in Materials and Structures","volume":" ","pages":""},"PeriodicalIF":2.0,"publicationDate":"2023-01-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47292435","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Hydro-thermo-fluidic aspects of Oldroyd B fluid with hybrid nanostructure subject to low and moderate Prandtl numbers 具有低和中等普朗特数混合纳米结构的Oldroyd B流体的水热流体方面
IF 2 4区 材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY Pub Date : 2023-01-26 DOI: 10.1108/mmms-09-2022-0200
Rajib Gope, M. Nayak, S. Shaw, S. Mondal
PurposeThe major goal of this article is to investigate flow and thermal aspects of Oldroyd B with hybrid nanostructure subject to a radially stretched surface under the influence of low and moderate Prandtl numbers.Design/methodology/approachThe non-dimensional governing equations are solved considering BVP4C in MATLAB as instrumental.FindingsEntropy generation effect is analyzed. Radial velocity and entropy generation exhibit opposite effect in response to amplified relaxation and retardation time parameters in case of both low and moderate Prandtl numbers. Augmented relaxation and retardation time parameters controls heat transfer rate.The results show that increasing the aspect ratio increases both the average Nusselt and entropy generation numbers for each value of the Prandtl number, while increasing the prandtl number decreases both. There is also a minimum value for the entropy generation number at a given relaxation and retardation parameter.Research limitations/implicationsAssume that the Oldroyd B fluid is dispersed with hybrid nanostructure in order to ameliorate thermal conductivity of Oldroyd B fluid so as to make it as best coolant.Practical implicationsThe low range of Prandtl number comprising particles of air, gas, etc. and moderate range of Prandtl number comprising particles of honey, thin motor oil, or any non-Newtonian liquid. The hybrid nanofluid is radiative in nature. Also, the effects of significant physical parameters on entropy generation are highlighted. The entropy generation number intensifies due to the rise in temperature difference parameter at low/moderate Prandtl number effectively. Entropy minimization can lead to the amelioration of available energy thereby enhances the efficiency of several thermal systems.Originality/valueThis article's primary goal is to investigate the flow and thermal aspects of Oldroyd B with a hybrid nanostructure subject to a radially stretched surface under the influence of low and moderate Prandtl numbers.
目的本文的主要目标是研究在中低普朗特数影响下,具有混合纳米结构的Oldroyd B在径向拉伸表面上的流动和热方面。设计/方法论/方法将MATLAB中的BVP4C作为工具来求解无量纲控制方程。发现对熵生成效应进行了分析。在低和中等普朗特数的情况下,径向速度和熵产生对放大的弛豫和延迟时间参数表现出相反的影响。增加的弛豫和延迟时间参数控制热传递速率。结果表明,增加长宽比会增加每个普朗特数值的平均努塞尔数和熵生成数,而增加普朗特数来减少这两个数。在给定的弛豫和延迟参数下,熵产生数也有一个最小值。研究局限性/含义假设Oldroyd B流体采用混合纳米结构分散,以改善Oldroyd B流体的导热性,使其成为最佳冷却剂。实际含义包括空气、气体等颗粒的普朗特数的低范围和包括蜂蜜、稀机油或任何非牛顿液体颗粒的普朗特数的中等范围。混合纳米流体具有辐射性质。此外,还强调了重要物理参数对熵产生的影响。在低/中等普朗特数下,由于温差参数的升高,熵产生数有效地增强。熵最小化可以改善可用能量,从而提高几个热系统的效率。原创性/价值本文的主要目标是研究在中低普朗特数的影响下,具有径向拉伸表面的混合纳米结构的Oldroyd B的流动和热方面。
{"title":"Hydro-thermo-fluidic aspects of Oldroyd B fluid with hybrid nanostructure subject to low and moderate Prandtl numbers","authors":"Rajib Gope, M. Nayak, S. Shaw, S. Mondal","doi":"10.1108/mmms-09-2022-0200","DOIUrl":"https://doi.org/10.1108/mmms-09-2022-0200","url":null,"abstract":"PurposeThe major goal of this article is to investigate flow and thermal aspects of Oldroyd B with hybrid nanostructure subject to a radially stretched surface under the influence of low and moderate Prandtl numbers.Design/methodology/approachThe non-dimensional governing equations are solved considering BVP4C in MATLAB as instrumental.FindingsEntropy generation effect is analyzed. Radial velocity and entropy generation exhibit opposite effect in response to amplified relaxation and retardation time parameters in case of both low and moderate Prandtl numbers. Augmented relaxation and retardation time parameters controls heat transfer rate.The results show that increasing the aspect ratio increases both the average Nusselt and entropy generation numbers for each value of the Prandtl number, while increasing the prandtl number decreases both. There is also a minimum value for the entropy generation number at a given relaxation and retardation parameter.Research limitations/implicationsAssume that the Oldroyd B fluid is dispersed with hybrid nanostructure in order to ameliorate thermal conductivity of Oldroyd B fluid so as to make it as best coolant.Practical implicationsThe low range of Prandtl number comprising particles of air, gas, etc. and moderate range of Prandtl number comprising particles of honey, thin motor oil, or any non-Newtonian liquid. The hybrid nanofluid is radiative in nature. Also, the effects of significant physical parameters on entropy generation are highlighted. The entropy generation number intensifies due to the rise in temperature difference parameter at low/moderate Prandtl number effectively. Entropy minimization can lead to the amelioration of available energy thereby enhances the efficiency of several thermal systems.Originality/valueThis article's primary goal is to investigate the flow and thermal aspects of Oldroyd B with a hybrid nanostructure subject to a radially stretched surface under the influence of low and moderate Prandtl numbers.","PeriodicalId":46760,"journal":{"name":"Multidiscipline Modeling in Materials and Structures","volume":" ","pages":""},"PeriodicalIF":2.0,"publicationDate":"2023-01-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48000960","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Simulation studies on combined effect of variable geometry, rotation and temperature gradient on critical speed of gas turbine disc 变几何、旋转和温度梯度对燃气轮机盘临界转速联合影响的仿真研究
IF 2 4区 材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY Pub Date : 2023-01-25 DOI: 10.1108/mmms-07-2022-0139
Ranjan Kumar, S. Chaterjee, V. Ranjan, S. Ghoshal
PurposeThe present findings report a significant influence of disc profile and thickness on the order of excitation leading to critical speed condition. Certain transverse modes of vibration of the disc have been obtained to be more susceptible to get excited while recording the lowest critical speeds.Design/methodology/approachNumerical simulation using finite-element method has been adopted due to the complicated geometry, complex loadings and intricate analytical formulation. A comprehensive analysis of exclusive as well as combination of thermal and centrifugal loads has been taken up to determine the intensity and characteristics of the individual/combined effects.FindingsThe typical gas turbine disc profile has been analyzed to predict the critical speed under the factual working condition of an aero-engine. FEM analysis of uniform and variable thickness discs have been carried out under stationary, rotating and rotating-thermal considerations while emphasizing the effect of disc profile and thickness. Centrifugal stresses developed due to rotational effect result in unceasing stiffening of the discs with higher stiffening for a greater number of nodal diameters. On the other hand, a role reversal of thermal effect from stiffening to softening is figured out with increasing numbers of nodal diameters. However, the discs are subjected to an overall stiffening effect on account of the combined centrifugal and thermal loading, with the effect decreasing with an increase in disc thickness. Under the combined loading, the order of excitation leading to critical speed condition is dependent on disc profile and thickness. Moreover, the vibrational modes (0,1) and (0,2) are identified as more prominent adverse modes corresponding to lowest critical speeds.Practical implicationsThe present findings are expected to serve as guidelines during the design phase of gas turbine discs of aeroengine applications.Originality/valueThe present work deliberates on the simulation and analysis of gas turbine disc specific to aeroengine application. The real-life disc geometry has been analyzed with due consideration of major factual operating conditions to identify the critical speed. The identification of various critical speed using numerical analysis can help to reduce the number of experimental tests required for certification.
目的本研究报告了圆盘轮廓和厚度对导致临界转速条件的激励顺序的显著影响。在记录最低临界速度时,圆盘的某些横向振动模态更容易被激发。设计/方法/途径由于结构复杂、载荷复杂、解析公式复杂,采用了有限元数值模拟方法。为了确定单个/组合效应的强度和特征,对热载荷和离心载荷的单独和组合进行了综合分析。结果分析了某型航空发动机实际工况下典型燃气轮机盘型的临界转速。在强调盘型和盘厚影响的情况下,对均匀和变厚盘进行了静、转、转热三种工况下的有限元分析。由于旋转效应而产生的离心应力导致圆盘不断硬化,对于更多的节点直径,硬化程度更高。另一方面,随着节点直径的增加,热效应从硬化到软化的作用发生了逆转。然而,由于离心和热载荷的联合作用,圆盘受到整体加筋效应,随着圆盘厚度的增加,这种效应减小。在组合载荷下,导致临界转速的激励顺序取决于盘形和盘厚。此外,振动模态(0,1)和(0,2)被识别为与最低临界速度相对应的更突出的不利模态。实际意义本研究结果有望为航空发动机燃气涡轮盘的设计阶段提供指导。本文对航空发动机专用燃气涡轮盘的仿真与分析进行了研究。对实际工况下的阀瓣几何形状进行了分析,并充分考虑了主要实际工况,以确定临界转速。使用数值分析确定各种临界速度有助于减少认证所需的实验测试次数。
{"title":"Simulation studies on combined effect of variable geometry, rotation and temperature gradient on critical speed of gas turbine disc","authors":"Ranjan Kumar, S. Chaterjee, V. Ranjan, S. Ghoshal","doi":"10.1108/mmms-07-2022-0139","DOIUrl":"https://doi.org/10.1108/mmms-07-2022-0139","url":null,"abstract":"PurposeThe present findings report a significant influence of disc profile and thickness on the order of excitation leading to critical speed condition. Certain transverse modes of vibration of the disc have been obtained to be more susceptible to get excited while recording the lowest critical speeds.Design/methodology/approachNumerical simulation using finite-element method has been adopted due to the complicated geometry, complex loadings and intricate analytical formulation. A comprehensive analysis of exclusive as well as combination of thermal and centrifugal loads has been taken up to determine the intensity and characteristics of the individual/combined effects.FindingsThe typical gas turbine disc profile has been analyzed to predict the critical speed under the factual working condition of an aero-engine. FEM analysis of uniform and variable thickness discs have been carried out under stationary, rotating and rotating-thermal considerations while emphasizing the effect of disc profile and thickness. Centrifugal stresses developed due to rotational effect result in unceasing stiffening of the discs with higher stiffening for a greater number of nodal diameters. On the other hand, a role reversal of thermal effect from stiffening to softening is figured out with increasing numbers of nodal diameters. However, the discs are subjected to an overall stiffening effect on account of the combined centrifugal and thermal loading, with the effect decreasing with an increase in disc thickness. Under the combined loading, the order of excitation leading to critical speed condition is dependent on disc profile and thickness. Moreover, the vibrational modes (0,1) and (0,2) are identified as more prominent adverse modes corresponding to lowest critical speeds.Practical implicationsThe present findings are expected to serve as guidelines during the design phase of gas turbine discs of aeroengine applications.Originality/valueThe present work deliberates on the simulation and analysis of gas turbine disc specific to aeroengine application. The real-life disc geometry has been analyzed with due consideration of major factual operating conditions to identify the critical speed. The identification of various critical speed using numerical analysis can help to reduce the number of experimental tests required for certification.","PeriodicalId":46760,"journal":{"name":"Multidiscipline Modeling in Materials and Structures","volume":" ","pages":""},"PeriodicalIF":2.0,"publicationDate":"2023-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46002716","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A model of changing of charge carriers mobility value in an implanted-junction rectifier under influence of mismatch-induced stress 错配应力影响下植入结整流器载流子迁移率的变化模型
IF 2 4区 材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY Pub Date : 2023-01-23 DOI: 10.1108/mmms-06-2022-0102
E. Pankratov
PurposeThe purpose of this paper is (1) to analyze the dependence of charge carriers mobility in an implanted-junction heterorectifier on mismatch-induced stress and (2) to elaborate an analytical approach for analysis of mass transfer with the possibility to take into account changing of parameters of mass transport in space and time at one time as well as nonlinearity of the considered transfer.Design/methodology/approachIn this paper, the author analyzed charge carriers mobility changing in an implanted-junction heterorectifier under the influence of mismatch-induced stress. The author introduced a model to describe the considered changing of carriers mobility. Based on the analysis of the model, the author formulated conditions (1) to decrease and to increase of the mobility under influence of the stress; and (2) the author analyzed the possibility to control of mismatch-induced stress by radiation processing of materials of the considered multilayer structure. The author also introduced an analytical approach for analysis of mass transfer. The approach gives a possibility to take into account changing of parameters of mass transport in space and time at one time as well as nonlinearity of the considered transfer.FindingsFindings dependence of charge carriers mobility in an implanted-junction heterorectifier on mismatch-induced stress. Also the author finds an analytical approach for analysis of mass transfer. The approach gives a possibility to take into account changing of parameters of mass transport in space and time at one time as well as nonlinearity of the considered transfer.Originality/valueAll results of this paper are original.
目的本文的目的是(1)分析植入结异质整流器中载流子迁移率与失配引起的应力的关系;(2)阐述一种可以同时考虑质量传递参数在空间和时间上的变化以及所考虑的传递的非线性的分析传质的分析方法。设计/方法/方法在本文中,作者分析了在错配引起的应力影响下,植入结异质整流器中载流子迁移率的变化。作者引入了一个模型来描述考虑的载流子迁移率变化。在对模型分析的基础上,提出了在应力作用下减小和增大流动度的条件;(2)分析了对多层结构材料进行辐射处理控制错配应力的可能性。作者还介绍了一种分析传质过程的分析方法。该方法提供了同时考虑质量传递参数在空间和时间上的变化以及所考虑传递的非线性的可能性。发现:植入结异质整流器中载流子迁移率与失配诱导应力的关系。作者还找到了一种分析传质过程的分析方法。该方法提供了同时考虑质量传递参数在空间和时间上的变化以及所考虑传递的非线性的可能性。原创性/价值本文所有结果均为原创。
{"title":"A model of changing of charge carriers mobility value in an implanted-junction rectifier under influence of mismatch-induced stress","authors":"E. Pankratov","doi":"10.1108/mmms-06-2022-0102","DOIUrl":"https://doi.org/10.1108/mmms-06-2022-0102","url":null,"abstract":"PurposeThe purpose of this paper is (1) to analyze the dependence of charge carriers mobility in an implanted-junction heterorectifier on mismatch-induced stress and (2) to elaborate an analytical approach for analysis of mass transfer with the possibility to take into account changing of parameters of mass transport in space and time at one time as well as nonlinearity of the considered transfer.Design/methodology/approachIn this paper, the author analyzed charge carriers mobility changing in an implanted-junction heterorectifier under the influence of mismatch-induced stress. The author introduced a model to describe the considered changing of carriers mobility. Based on the analysis of the model, the author formulated conditions (1) to decrease and to increase of the mobility under influence of the stress; and (2) the author analyzed the possibility to control of mismatch-induced stress by radiation processing of materials of the considered multilayer structure. The author also introduced an analytical approach for analysis of mass transfer. The approach gives a possibility to take into account changing of parameters of mass transport in space and time at one time as well as nonlinearity of the considered transfer.FindingsFindings dependence of charge carriers mobility in an implanted-junction heterorectifier on mismatch-induced stress. Also the author finds an analytical approach for analysis of mass transfer. The approach gives a possibility to take into account changing of parameters of mass transport in space and time at one time as well as nonlinearity of the considered transfer.Originality/valueAll results of this paper are original.","PeriodicalId":46760,"journal":{"name":"Multidiscipline Modeling in Materials and Structures","volume":" ","pages":""},"PeriodicalIF":2.0,"publicationDate":"2023-01-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42258934","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Thermodynamical interactions in a rotating functionally graded semiconductor material with gravity 重力作用下旋转功能梯度半导体材料的热力学相互作用
IF 2 4区 材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY Pub Date : 2023-01-10 DOI: 10.1108/mmms-08-2022-0164
D. Sheoran, Komal Yadav, Baljit Singh Punia, K. K. Kalkal
PurposeThe purpose of this paper is to analyse the transient effects in a functionally graded photo-thermoelastic (TE) medium with gravity and rotation by considering two generalised TE theories: Lord–Shulman (LS) and Green–Lindsay (GL). The governing equations are derived in rectangular Cartesian coordinates for a two dimensional problem.Design/methodology/approachAll the physical properties of the semiconductor are supposed to vary exponentially with distance. The analytical solution is procured by employing normal mode technique on the resulting non-dimensional coupled field equations with appropriate boundary conditions.FindingsFor the mechanically loaded thermally insulated surface, normal displacement, stress components, temperature distribution and carrier density are calculated numerically with the help of MATLAB software for a silicon semiconductor and displayed graphically. Some particular cases of interest have also been deduced from the present results.Originality/valueThe effects of rotation and non-homogeneity on the different physical fields are investigated on the basis of analytical and numerical results. Comparisons are made with the results predicted by GL theory in the presence and absence of gravity for different values of time. Comparisons are also made between the three theories in the presence of rotation, gravity and in-homogeneity. Such problems are very important in many dynamical systems.
目的通过考虑Lord–Shulman(LS)和Green–Lindsay(GL)两种广义光热弹性理论,分析具有重力和旋转的功能梯度光热弹性(TE)介质中的瞬态效应。在直角笛卡尔坐标系中导出了二维问题的控制方程。设计/方法/方法半导体的所有物理特性都应该随着距离呈指数变化。在适当的边界条件下,通过对所得到的无量纲耦合场方程采用正模技术来获得解析解。结果利用MATLAB软件对机械加载的硅半导体绝热表面进行了法向位移、应力分量、温度分布和载流子密度的数值计算,并进行了图形显示。还从目前的结果中推断出了一些感兴趣的特殊情况。原创性/数值在分析和数值结果的基础上,研究了旋转和非均匀性对不同物理场的影响。并与GL理论在有无重力条件下对不同时间值的预测结果进行了比较。在存在旋转、重力和均匀性的情况下,对这三种理论进行了比较。这样的问题在许多动力系统中是非常重要的。
{"title":"Thermodynamical interactions in a rotating functionally graded semiconductor material with gravity","authors":"D. Sheoran, Komal Yadav, Baljit Singh Punia, K. K. Kalkal","doi":"10.1108/mmms-08-2022-0164","DOIUrl":"https://doi.org/10.1108/mmms-08-2022-0164","url":null,"abstract":"PurposeThe purpose of this paper is to analyse the transient effects in a functionally graded photo-thermoelastic (TE) medium with gravity and rotation by considering two generalised TE theories: Lord–Shulman (LS) and Green–Lindsay (GL). The governing equations are derived in rectangular Cartesian coordinates for a two dimensional problem.Design/methodology/approachAll the physical properties of the semiconductor are supposed to vary exponentially with distance. The analytical solution is procured by employing normal mode technique on the resulting non-dimensional coupled field equations with appropriate boundary conditions.FindingsFor the mechanically loaded thermally insulated surface, normal displacement, stress components, temperature distribution and carrier density are calculated numerically with the help of MATLAB software for a silicon semiconductor and displayed graphically. Some particular cases of interest have also been deduced from the present results.Originality/valueThe effects of rotation and non-homogeneity on the different physical fields are investigated on the basis of analytical and numerical results. Comparisons are made with the results predicted by GL theory in the presence and absence of gravity for different values of time. Comparisons are also made between the three theories in the presence of rotation, gravity and in-homogeneity. Such problems are very important in many dynamical systems.","PeriodicalId":46760,"journal":{"name":"Multidiscipline Modeling in Materials and Structures","volume":" ","pages":""},"PeriodicalIF":2.0,"publicationDate":"2023-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45714345","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
期刊
Multidiscipline Modeling in Materials and Structures
全部 Acc. Chem. Res. ACS Applied Bio Materials ACS Appl. Electron. Mater. ACS Appl. Energy Mater. ACS Appl. Mater. Interfaces ACS Appl. Nano Mater. ACS Appl. Polym. Mater. ACS BIOMATER-SCI ENG ACS Catal. ACS Cent. Sci. ACS Chem. Biol. ACS Chemical Health & Safety ACS Chem. Neurosci. ACS Comb. Sci. ACS Earth Space Chem. ACS Energy Lett. ACS Infect. Dis. ACS Macro Lett. ACS Mater. Lett. ACS Med. Chem. Lett. ACS Nano ACS Omega ACS Photonics ACS Sens. ACS Sustainable Chem. Eng. ACS Synth. Biol. Anal. Chem. BIOCHEMISTRY-US Bioconjugate Chem. BIOMACROMOLECULES Chem. Res. Toxicol. Chem. Rev. Chem. Mater. CRYST GROWTH DES ENERG FUEL Environ. Sci. Technol. Environ. Sci. Technol. Lett. Eur. J. Inorg. Chem. IND ENG CHEM RES Inorg. Chem. J. Agric. Food. Chem. J. Chem. Eng. Data J. Chem. Educ. J. Chem. Inf. Model. J. Chem. Theory Comput. J. Med. Chem. J. Nat. Prod. J PROTEOME RES J. Am. Chem. Soc. LANGMUIR MACROMOLECULES Mol. Pharmaceutics Nano Lett. Org. Lett. ORG PROCESS RES DEV ORGANOMETALLICS J. Org. Chem. J. Phys. Chem. J. Phys. Chem. A J. Phys. Chem. B J. Phys. Chem. C J. Phys. Chem. Lett. Analyst Anal. Methods Biomater. Sci. Catal. Sci. Technol. Chem. Commun. Chem. Soc. Rev. CHEM EDUC RES PRACT CRYSTENGCOMM Dalton Trans. Energy Environ. Sci. ENVIRON SCI-NANO ENVIRON SCI-PROC IMP ENVIRON SCI-WAT RES Faraday Discuss. Food Funct. Green Chem. Inorg. Chem. Front. Integr. Biol. J. Anal. At. Spectrom. J. Mater. Chem. A J. Mater. Chem. B J. Mater. Chem. C Lab Chip Mater. Chem. Front. Mater. Horiz. MEDCHEMCOMM Metallomics Mol. Biosyst. Mol. Syst. Des. Eng. Nanoscale Nanoscale Horiz. Nat. Prod. Rep. New J. Chem. Org. Biomol. Chem. Org. Chem. Front. PHOTOCH PHOTOBIO SCI PCCP Polym. Chem.
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
0
微信
客服QQ
Book学术公众号 扫码关注我们
反馈
×
意见反馈
请填写您的意见或建议
请填写您的手机或邮箱
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
Book学术官方微信
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术
文献互助 智能选刊 最新文献 互助须知 联系我们:info@booksci.cn
Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。
Copyright © 2023 Book学术 All rights reserved.
ghs 京公网安备 11010802042870号 京ICP备2023020795号-1