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Grain size responsive uniaxial tensile behavior of polycrystalline nanocopper under different temperatures and strain rates 晶粒尺寸对不同温度和应变速率下多晶纳米铜单轴拉伸行为的响应
IF 2 4区 材料科学 Q1 Mathematics Pub Date : 2023-03-21 DOI: 10.1108/mmms-09-2022-0187
Rajat Kumar, M. K. Gupta, S. Rai, Vinay Panwar
PurposeThe changes in tensile behavior of polycrystalline nanocopper lattice with changes in temperature, average grain size (AGS) and strain rate, have been explored. The existence of a critical AGS has also been observed which shows that the Hall–Petch relationship behaves inversely.Design/methodology/approachNanoscale deformation of polycrystalline nanocopper has been done in this study with the help of an embedded atom method (EAM) potential. Voronoi construction method has been employed for creating four polycrystals of nanocopper with different sizes. Statistical analysis has been used to examine the observations with emphasis on the polycrystal size effect on melting point temperature.FindingsThe study has found that the key stress values (i.e. elastic modulus, yield stress and ultimate tensile stress) are significantly influenced by the considered parameters. The increase in strain rate is observed to have an increasing impact on mechanical properties, whereas the increase in temperature degrades the mechanical properties. In-depth analysis of the deformation mechanism has been studied to deliver real-time visualization of grain boundary motion.Originality/valueThis study provides the relationship between required grain size variations for consecutive possible variations in mechanical properties and may help to reduce the trial processes in the synthesis of polycrystalline copper based on different temperatures and strain rates.
目的探讨多晶纳米铜晶格的拉伸行为随温度、平均晶粒尺寸和应变速率的变化规律。我们还观察到临界AGS的存在,这表明Hall-Petch关系是相反的。本研究利用嵌入原子法(EAM)电位完成了多晶纳米铜的纳米级变形。采用Voronoi构造方法制备了四种不同尺寸的纳米铜多晶。用统计分析来检验观察结果,重点是多晶尺寸对熔点温度的影响。研究发现,关键应力值(即弹性模量、屈服应力和极限拉应力)受到所考虑参数的显著影响。应变速率的增加对力学性能的影响越来越大,而温度的升高使力学性能下降。深入分析了变形机理,实现了晶界运动的实时可视化。独创性/价值本研究提供了连续可能的力学性能变化所需的晶粒尺寸变化之间的关系,并可能有助于减少基于不同温度和应变速率合成多晶铜的试验过程。
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引用次数: 0
Computational homogenization based crystal plasticity investigation of deformation behavior of AA2024-T3 alloy at different strain rates 基于计算均匀化的AA2024-T3合金在不同应变速率下变形行为的晶体塑性研究
IF 2 4区 材料科学 Q1 Mathematics Pub Date : 2023-03-21 DOI: 10.1108/mmms-10-2022-0236
L. Singh, S. Ha, S. Vohra, Manuj Sharma
PurposeModeling of material behavior by physically or microstructure-based models helps in understanding the relationships between its properties and microstructure. However, the majority of the numerical investigations on the prediction of the deformation behavior of AA2024 alloy are limited to the use of phenomenological or empirical constitutive models, which fail to take into account the actual microscopic-level mechanisms (i.e. crystallographic slip) causing plastic deformation. In order to achieve accurate predictions, the microstructure-based constitutive models involving the underlying physical deformation mechanisms are more reliable. Therefore, the aim of this work is to predict the mechanical response of AA2024-T3 alloy subjected to uniaxial tension at different strain rates, using a dislocation density-based crystal plasticity model in conjunction with computational homogenization.Design/methodology/approachA dislocation density-based crystal plasticity (CP) model along with computational homogenization is presented here for predicting the mechanical behavior of aluminium alloy AA2024-T3 under uniaxial tension at different strain rates. A representative volume element (RVE) containing 400 grains subjected to periodic boundary conditions has been used for simulations. The effect of mesh discretization on the mechanical response is investigated by considering different meshing resolutions for the RVE. Material parameters of the CP model have been calibrated by fitting the experimental data. Along with the CP model, Johnson–Cook (JC) model is also used for examining the stress-strain behavior of the alloy at various strain rates. Validation of the predictions of CP and JC models is done with the experimental results where the CP model has more accurately captured the deformation behavior of the aluminium alloy.FindingsThe CP model is able to predict the mechanical response of AA2024-T3 alloy over a wide range of strain rates with a single set of material parameters. Furthermore, it is observed that the inhomogeneity in stress-strain fields at the grain level is linked to both the orientation of the grains as well as their interactions with one another. The flow and hardening rule parameters influencing the stress-strain curve and capturing the strain rate dependency are also identified.Originality/valueComputational homogenization-based CP modeling and simulation of deformation behavior of polycrystalline alloy AA2024-T3 alloy at various strain rates is not available in the literature. Therefore, the present computational homogenization-based CP model can be used for predicting the deformation behavior of AA2024-T3 alloy more accurately at both micro and macro scales, under different strain rates.
目的通过基于物理或微观结构的模型对材料行为进行建模,有助于理解其性能和微观结构之间的关系。然而,关于AA2024合金变形行为预测的大多数数值研究仅限于使用唯象或经验本构模型,这些模型未能考虑导致塑性变形的实际微观机制(即结晶滑移)。为了实现准确的预测,涉及潜在物理变形机制的基于微观结构的本构模型更可靠。因此,本工作的目的是使用基于位错密度的晶体塑性模型结合计算均匀化,预测AA2024-T3合金在不同应变速率下受到单轴拉伸的力学响应。设计/方法/方法本文提出了一种基于位错密度的晶体塑性(CP)模型以及计算均匀化,用于预测AA2024-T3铝合金在不同应变速率下单轴拉伸下的力学行为。已使用包含经受周期性边界条件的400个晶粒的代表性体积元素(RVE)进行模拟。通过考虑RVE不同的网格分辨率,研究了网格离散化对力学响应的影响。通过对实验数据的拟合,对CP模型的材料参数进行了标定。除了CP模型外,Johnson–Cook(JC)模型还用于检测合金在不同应变速率下的应力-应变行为。用实验结果验证了CP和JC模型的预测,其中CP模型更准确地捕捉了铝合金的变形行为。发现CP模型能够用一组材料参数预测AA2024-T3合金在宽应变速率范围内的力学响应。此外,观察到晶粒水平上应力-应变场的不均匀性与晶粒的取向及其相互作用有关。还确定了影响应力-应变曲线和捕捉应变速率相关性的流动和硬化规则参数。原创性/价值文献中没有基于计算均匀化的多晶合金AA2024-T3在各种应变速率下变形行为的CP建模和模拟。因此,基于计算均匀化的CP模型可用于在不同应变速率下更准确地预测AA2024-T3合金的微观和宏观变形行为。
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引用次数: 1
Mechanical properties of PLA based closed porous structures manufactured using FDM process FDM法制备PLA基封闭多孔结构的力学性能
IF 2 4区 材料科学 Q1 Mathematics Pub Date : 2023-03-21 DOI: 10.1108/mmms-10-2022-0220
I. Yavuz, Abdulkadir Yildirim
PurposeThe purpose of this article covers the design and manufacture of porous materials that can be used in different engineering applications by additive manufacturing.Design/methodology/approachThe most important design parameters of the porous materials are the cell structure and wall thickness. These two design criteria are difficult to control in porous materials produced by conventional production methods. In the study, two different wall thicknesses and four different pore diameters of the porous structure were determined as design parameters.FindingsA compression test was applied to the produced samples. Also, the densities of the produced samples were compared. As a result of the study, changes in mechanical properties were observed according to the cell wall thickness and pore size.Originality/valueThe originality of the study is that, unlike traditional porous structure production, the pore structure and cell wall thicknesses can be produced in desired dimensions. In addition, a closed pore structure was tried to be produced in the study. Studies in the literature generally have a tube-type pore structure.
目的本文旨在通过增材制造设计和制造可用于不同工程应用的多孔材料。设计/方法/方法多孔材料最重要的设计参数是孔道结构和壁厚。在通过传统生产方法生产的多孔材料中,这两个设计标准很难控制。在研究中,确定了多孔结构的两种不同壁厚和四种不同孔径作为设计参数。发现对生产的样品进行了压缩试验。此外,还对生产的样品的密度进行了比较。作为研究的结果,观察到机械性能根据细胞壁厚度和孔径的变化。独创性/价值该研究的独创性在于,与传统的多孔结构生产不同,孔结构和细胞壁厚度可以按所需尺寸生产。此外,在研究中还试图产生一种闭孔结构。文献中的研究通常具有管状孔结构。
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引用次数: 0
The effect of memory and stiffness on energy ratios at the interface of distinct media 记忆和刚度对不同介质界面能量比的影响
IF 2 4区 材料科学 Q1 Mathematics Pub Date : 2023-03-15 DOI: 10.1108/mmms-10-2022-0209
M. Barak, Rajesh Kumar, Rajneesh Kumar, V. Gupta
PurposeThis paper aims to study the energy ratios of plane waves on an imperfect interface of elastic half-space (EHS) and orthotropic piezothermoelastic half-space (OPHS).Design/methodology/approachThe dual-phase lag (DPL) theory with memory-dependent derivatives is employed to study the variation of energy ratios at the imperfect interface.FindingsA plane longitudinal wave (P) or transversal wave (SV) propagates through EHS and strikes at the interface. As a result, two waves are reflected, and four waves are transmitted, as shown in Figure 2. The amplitude ratios are determined by imperfect boundaries having normal stiffness and transverse stiffness. The variation of energy ratios is computed numerically for a particular model of graphite (EHS)/cadmium selenide (OPHS) and depicted graphically against the angle of incidence to consider the effect of stiffness parameters, memory and kernel functions.Research limitations/implicationsThe energy distribution of incident P or SV waves among various reflected and transmitted waves, as well as the interaction of waves for imperfect interface (IIF), normal stiffness interface (NSIF), transverse stiffness interface (TSIF), and welded contact interface (WCIF), are important factors to consider when studying seismic wave behavior.Practical implicationsThe present model may be used in various disciplines, such as high-energy particle physics, earthquake engineering, nuclear fusion, aeronautics, soil dynamics and other areas where memory-dependent derivative and phase delays are significant.Originality/valueIn a variety of technical and geophysical scenarios, wave propagation in an elastic/piezothermoelastic medium with varying magnetic fields, initial stress, temperature, porosity, etc., gives important information regarding the presence of new and modified waves.
目的研究弹性半空间(EHS)和正交各向异性压热弹性半空间的非完美界面上平面波的能量比。设计/方法/方法采用具有记忆相关导数的双相位滞后(DPL)理论研究非完美界面处能量比的变化。发现平面纵波(P)或横波(SV)通过EHS传播并撞击界面。结果,两个波被反射,四个波被传输,如图2所示。振幅比由具有法向刚度和横向刚度的不完美边界确定。针对石墨(EHS)/硒化镉(OPHS)的特定模型,对能量比的变化进行了数值计算,并根据入射角以图形方式进行了描述,以考虑刚度参数、记忆和核函数的影响。研究局限性/含义入射P波或SV波在各种反射波和透射波之间的能量分布,以及不完美界面(IIF)、法向刚度界面(NSIF)、横向刚度接口(TSIF)和焊接接触界面(WCIF)的波的相互作用,是研究地震波行为时需要考虑的重要因素。实际意义本模型可用于各种学科,如高能粒子物理学、地震工程、核聚变、航空、土壤动力学和其他记忆相关导数和相位延迟显著的领域。独创性/价值在各种技术和地球物理场景中,具有不同磁场、初始应力、温度、孔隙率等的弹性/压热弹性介质中的波传播提供了有关新波和修正波存在的重要信息。
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引用次数: 5
Analytical and inverse method for determining high temperature properties of materials using small punch creep: a review 利用小冲孔蠕变测定材料高温性能的解析与反演方法综述
IF 2 4区 材料科学 Q1 Mathematics Pub Date : 2023-03-14 DOI: 10.1108/mmms-12-2022-0291
Ming Li, Hongwei Liu, J. Du, Z. Wen, Z. Yue, Wei Sun
PurposeThis paper presents a review concerning the analytical and inverse methods of small punch creep test (SPCT) in order to evaluate the mechanical property of component material at elevated temperature.Design/methodology/approachIn this work, the effects of temperature, specimen size and shape on material properties are mainly discussed using the finite element (FE) method. The analytical approaches including membrane stretching, empirical or semi-empirical solutions that are currently used for data interpretation have been presented.FindingsThe state-of-the-art research progress on the inverse method, such as non-linear optimization program and neutral network, is critically reviewed. The capabilities of the inverse technique, the uniqueness of the solution and future development are discussed.Originality/valueThe state-of-the-art research progress on the inverse method such as non-linear optimization program and neutral network is critically reviewed. The capabilities of the inverse technique, the uniqueness of the solution and future development are discussed.
本文综述了用小冲头蠕变试验(SPCT)的分析方法和反方法来评价构件材料在高温下的力学性能。设计/方法/方法在这项工作中,主要使用有限元方法讨论了温度、试样尺寸和形状对材料性能的影响。已经提出了目前用于数据解释的分析方法,包括膜拉伸、经验或半经验解决方案。综述了非线性优化程序和神经网络等逆方法的最新研究进展。讨论了逆技术的能力、解的唯一性和未来的发展。原创性/价值对非线性优化程序和神经网络等逆方法的最新研究进展进行了评述。讨论了逆技术的能力、解的唯一性和未来的发展。
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引用次数: 0
Fracture mechanism and failure criterion of S-07 steel for liquid rocket engine 液体火箭发动机用S-07钢断裂机理及失效准则
IF 2 4区 材料科学 Q1 Mathematics Pub Date : 2023-03-01 DOI: 10.1108/mmms-11-2022-0257
Yushan Gao, Wei Jiang, S. Huo
PurposeThe fracture mechanism of S-07 steel was investigated by observing the fracture surface of the specimens with scanning electron microscope (SEM). Furthermore, the overall elastic–plastic behaviors and the stress state evolution during the loading procedure of all specimens were simulated by FE analysis to obtain the local strain at crack nucleated location and the average triaxiality of each type of specimen.Design/methodology/approachThree types of tests under various stress states were performed to study the ductile fracture characteristics of S-07 high strength steel in quasi-static condition.FindingsUnder tensile and torsion loading conditions, S-07 steel exhibits two distinctive rupture mechanisms: the growth and internal necking of voids governs the rupture mechanism in tension dominated loading mode, while the change of void shape and internal shearing in the ligaments between voids dominants for shear conditions.Originality/valueThe failure criterion for S-07 steel considering the influence of the triaxial stress state was established.
目的利用扫描电镜(SEM)观察S-07钢试样断口形貌,探讨其断裂机理。通过有限元分析,模拟了各试件在加载过程中的整体弹塑性行为和应力状态演化,得到了各试件在裂纹成核位置的局部应变和平均三轴度。设计/方法/方法通过三种不同应力状态下的试验,研究了S-07高强度钢在准静态状态下的韧性断裂特性。结果:在拉伸和扭转加载条件下,S-07钢表现出两种不同的断裂机制:在拉伸主导加载模式下,孔洞的生长和内缩颈主导断裂机制,而在剪切模式下,孔洞形状的变化和孔洞间韧带的内部剪切主导断裂机制。建立了考虑三轴应力状态影响的S-07钢破坏准则。
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引用次数: 0
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 Q1 Mathematics 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。
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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 Q1 Mathematics 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。
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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 Q1 Mathematics 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。
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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 Q1 Mathematics 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。
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引用次数: 0
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Multidiscipline Modeling in Materials and Structures
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