H. Golmakani, ُسیامک مزدک, Saman Moradi besheli, Ebrahim ُSharifi
{"title":"Numerical and experimental comparison of deep drawing process of the square sample with rubber matrix and metal die","authors":"H. Golmakani, ُسیامک مزدک, Saman Moradi besheli, Ebrahim ُSharifi","doi":"10.52547/masm.2.2.172","DOIUrl":"https://doi.org/10.52547/masm.2.2.172","url":null,"abstract":"","PeriodicalId":167079,"journal":{"name":"Mechanic of Advanced and Smart Materials","volume":"145 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115001007","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
S. Jafari Mehrabadi, A. Nezamabadi, Ehsan Moayeedi
In this article bending analysis of composite Euler-Bernoulli micro-beam made of functionally graded materials resting on elastic foundation by strain gradient theory has been studied. The material properties of structure have been assumed by Reddy ’ s power law model such as the bottom layer and top layer being ceramic and metal material respectively. At first, by using the assumptions of elasticity strain gradient theory and calculating the total potential energy of system after determining the work of external distributed load by using the Hamilton's principal the equations of motion have been derived. Note that the work down by the Winkler elastic foundation is considered. Because the solutions of mentioned equations are not possible by analytical method, the equations have been solved by generalized differential quadrature method in simply supported boundary conditions. By comparing the answers of problem with other published references, we confident form the obtained results. At the end, effect of material length scale and power law index coefficient of functionally graded materials and stiffness of elastic foundation on deflection of micro-beam has been studied. 5-Obtained deflection based on the classical theory is more than obtained deflection from the couple stress theory. Also, Obtained deflection based on the couple stress theory is more than the obtained deflection based on the strain gradient theory. This difference of the results increases by increasing the non-dimensional parameter h/l.
{"title":"Deflection analysis of composite micro-beam on elastic foundation by strain gradient theory","authors":"S. Jafari Mehrabadi, A. Nezamabadi, Ehsan Moayeedi","doi":"10.52547/masm.2.1.94","DOIUrl":"https://doi.org/10.52547/masm.2.1.94","url":null,"abstract":"In this article bending analysis of composite Euler-Bernoulli micro-beam made of functionally graded materials resting on elastic foundation by strain gradient theory has been studied. The material properties of structure have been assumed by Reddy ’ s power law model such as the bottom layer and top layer being ceramic and metal material respectively. At first, by using the assumptions of elasticity strain gradient theory and calculating the total potential energy of system after determining the work of external distributed load by using the Hamilton's principal the equations of motion have been derived. Note that the work down by the Winkler elastic foundation is considered. Because the solutions of mentioned equations are not possible by analytical method, the equations have been solved by generalized differential quadrature method in simply supported boundary conditions. By comparing the answers of problem with other published references, we confident form the obtained results. At the end, effect of material length scale and power law index coefficient of functionally graded materials and stiffness of elastic foundation on deflection of micro-beam has been studied. 5-Obtained deflection based on the classical theory is more than obtained deflection from the couple stress theory. Also, Obtained deflection based on the couple stress theory is more than the obtained deflection based on the strain gradient theory. This difference of the results increases by increasing the non-dimensional parameter h/l.","PeriodicalId":167079,"journal":{"name":"Mechanic of Advanced and Smart Materials","volume":"22 1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130701435","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
In this paper, the hydromagnetic propulsion system in marine application is taken into account. If the conduction fluid channel is exposed to a magnetic field and an electric field perpendicular to the fluid flow, under the interaction of electric current and magnetic field, a force is generated to flow the fluid, which is the basis of hydromagnetic propulsion systems. Hydromagnetic propulsion systems have a variety of applications which the most important ones are molten metal transfer system, small hydromagnetic pumps and marine propulsion system. Therefore, in this research, a literature review is performed and 70 valid scientific references in this field are studied and presented. Various classifications of the hydromagnetic thrust system are presented based on the installation location, type of electric field, type of fluid conducting channel, etc. The operating applications of hydromagnetic thrust systems are presented for all types of marine and submarine cargos. This paper can be a benchmark for future researches on hydromagnetic propulsion systems. model to describe the hydromagnetic thrust. The results showed that the efficiency of the system
{"title":"Hydromagnetic Propulsion System\u0000 in Marine Applications: a Literature Review","authors":"M. Nasiri, M. Nazemizadeh","doi":"10.52547/masm.2.1.13","DOIUrl":"https://doi.org/10.52547/masm.2.1.13","url":null,"abstract":"In this paper, the hydromagnetic propulsion system in marine application is taken into account. If the conduction fluid channel is exposed to a magnetic field and an electric field perpendicular to the fluid flow, under the interaction of electric current and magnetic field, a force is generated to flow the fluid, which is the basis of hydromagnetic propulsion systems. Hydromagnetic propulsion systems have a variety of applications which the most important ones are molten metal transfer system, small hydromagnetic pumps and marine propulsion system. Therefore, in this research, a literature review is performed and 70 valid scientific references in this field are studied and presented. Various classifications of the hydromagnetic thrust system are presented based on the installation location, type of electric field, type of fluid conducting channel, etc. The operating applications of hydromagnetic thrust systems are presented for all types of marine and submarine cargos. This paper can be a benchmark for future researches on hydromagnetic propulsion systems. model to describe the hydromagnetic thrust. The results showed that the efficiency of the system","PeriodicalId":167079,"journal":{"name":"Mechanic of Advanced and Smart Materials","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123874665","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The widespread use of lightweight and flexible structures in industries such as aerospace and the increasing use of thin plates in these structures, which are easily fluttered and unstable in rapid air currents, make the use of active and inactive flutter control methods inevitable. In the present study, by examining the governing equations and employing SOF (Static Output Feedback) method, we have tried to position the vibration sensors to get the closest performance to the LQR controller. To do this, a rectangular plate exposed to supersonic current is considered. A piezoelectric patch is used to control the vibrations. A rectangular plate exposed to supersonic current is considered. A piezoelectric patch is used to control the vibrations. Von Karman thin plate theory and Mindlin moderately thick plate theory are used for simulating the plate. The first-order piston theory is used to model the airflow. The equations of motion are obtained using the Lagrange method and the displacement field approximation by finite power series. Then, a criterion for finding the points whose displacement feedback combination can provide the closest control performance to the LQR controller is presented. Finally, the performance of the obtained criterion has been evaluated and confirmed by numerical simulation. The results show that the plate's flutter can be effectively suppressed at speeds beyond twice the critical velocity, feeding back a specific combination of certain points' displacements. The results show this method presents a performance comparable to the LQR controller, despite removing the state estimator.
{"title":"Optimal placement of the sensors for Static Output Feedback of fluttering plates in the supersonic flow","authors":"S. Farhadi, Kamran Asadi","doi":"10.52547/masm.2.1.73","DOIUrl":"https://doi.org/10.52547/masm.2.1.73","url":null,"abstract":"The widespread use of lightweight and flexible structures in industries such as aerospace and the increasing use of thin plates in these structures, which are easily fluttered and unstable in rapid air currents, make the use of active and inactive flutter control methods inevitable. In the present study, by examining the governing equations and employing SOF (Static Output Feedback) method, we have tried to position the vibration sensors to get the closest performance to the LQR controller. To do this, a rectangular plate exposed to supersonic current is considered. A piezoelectric patch is used to control the vibrations. A rectangular plate exposed to supersonic current is considered. A piezoelectric patch is used to control the vibrations. Von Karman thin plate theory and Mindlin moderately thick plate theory are used for simulating the plate. The first-order piston theory is used to model the airflow. The equations of motion are obtained using the Lagrange method and the displacement field approximation by finite power series. Then, a criterion for finding the points whose displacement feedback combination can provide the closest control performance to the LQR controller is presented. Finally, the performance of the obtained criterion has been evaluated and confirmed by numerical simulation. The results show that the plate's flutter can be effectively suppressed at speeds beyond twice the critical velocity, feeding back a specific combination of certain points' displacements. The results show this method presents a performance comparable to the LQR controller, despite removing the state estimator.","PeriodicalId":167079,"journal":{"name":"Mechanic of Advanced and Smart Materials","volume":"137 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122815778","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The perturbation friction process is a solid state method used to modify the surface, improve mechanical properties, and produce composites. In this research, the effect of effective parameters on the surface compositing of AZ31B / CNT alloy with carbon nanotubes has been investigated by the turbulent friction process method and by the Sobel sensitivity analysis method. Input parameters in this study were advance speed, rotation speed, weight percentage of carbon nanotubes and number of welding passes. Also considered outputs included hardness and weight loss. In order to analyze the results, Sobel sensitivity analysis has been used to investigate the qualitative and quantitative effect of inputs on outputs. The results of this study showed that the weight percentage of carbon nanotubes, rotation speed, number of welding passes and advancing speed affect hardness, respectively. Also, the weight percentage of carbon nanotubes, the number of welding passes, the rotation speed and the advancing speed affect the weight loss.
{"title":"Investigation of the effect of turbulent friction process parameters on the surface mechanical properties of AZ31B/CNT nanocomposite using Sobel sensitivity analysis","authors":"E. Mansouri, Hasan Hooshangi, Milad Salehi","doi":"10.52547/masm.2.1.108","DOIUrl":"https://doi.org/10.52547/masm.2.1.108","url":null,"abstract":"The perturbation friction process is a solid state method used to modify the surface, improve mechanical properties, and produce composites. In this research, the effect of effective parameters on the surface compositing of AZ31B / CNT alloy with carbon nanotubes has been investigated by the turbulent friction process method and by the Sobel sensitivity analysis method. Input parameters in this study were advance speed, rotation speed, weight percentage of carbon nanotubes and number of welding passes. Also considered outputs included hardness and weight loss. In order to analyze the results, Sobel sensitivity analysis has been used to investigate the qualitative and quantitative effect of inputs on outputs. The results of this study showed that the weight percentage of carbon nanotubes, rotation speed, number of welding passes and advancing speed affect hardness, respectively. Also, the weight percentage of carbon nanotubes, the number of welding passes, the rotation speed and the advancing speed affect the weight loss.","PeriodicalId":167079,"journal":{"name":"Mechanic of Advanced and Smart Materials","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122674359","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Investigation of hydroforming process loading paths based on experimental and improvement based on Sobol sensitivity analysis","authors":"S. H. Bathaee, M. Sabzevari, Hasan Moslemi Naeini","doi":"10.52547/masm.2.1.53","DOIUrl":"https://doi.org/10.52547/masm.2.1.53","url":null,"abstract":"","PeriodicalId":167079,"journal":{"name":"Mechanic of Advanced and Smart Materials","volume":"94 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125262721","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The purpose of this study is to investigate the method of mechanical alloying and its effect on the compounds obtained from the Ti-Si- ternary powder system. At first, a mixture of Ti, Si and C powders with stoichiometric ratio according to Ti 3 SiC 2 chemical composition was milled by high energy planetary ball milling with balls to powder weight ratio of 20: 1 and a rotation speed of 360 rpm. To evaluate the thermal stability of the formed phases and determine the mechanism of reactions, the 40 h milled sample was analyzed by DTA. Then, to test the peaks obtained during DTA analysis, the 20 milled sample thermal treated at 1200°C and 1400°C for 1h. To identify phase development, XRD was used and the microstructural evaluation was obtained by SEM / EDS. The results showed that increasing the milling time not only does not increase the purity of Ti 3 SiC 2 but also causes more impurities mainly TiC and SiC. But heat treatment at 1200 ° C increases the purity of Ti 3 SiC 2 . The mechanism that occurs in the 3Ti-Si-2C system is that first TiC is formed and its heat causes more mixing and the formation of Ti and Si melt. As the TiC process continues, it reacts with the Ti-Si melt to form Ti 3 SiC 2 .
{"title":"Investigation of compounds obtained from Ti-Si-C ternary powder system by mechanical alloying and spark plasma sintering","authors":"M. Zarezadeh Mehrizi, mohaddeseh kandi","doi":"10.52547/masm.2.1.35","DOIUrl":"https://doi.org/10.52547/masm.2.1.35","url":null,"abstract":"The purpose of this study is to investigate the method of mechanical alloying and its effect on the compounds obtained from the Ti-Si- ternary powder system. At first, a mixture of Ti, Si and C powders with stoichiometric ratio according to Ti 3 SiC 2 chemical composition was milled by high energy planetary ball milling with balls to powder weight ratio of 20: 1 and a rotation speed of 360 rpm. To evaluate the thermal stability of the formed phases and determine the mechanism of reactions, the 40 h milled sample was analyzed by DTA. Then, to test the peaks obtained during DTA analysis, the 20 milled sample thermal treated at 1200°C and 1400°C for 1h. To identify phase development, XRD was used and the microstructural evaluation was obtained by SEM / EDS. The results showed that increasing the milling time not only does not increase the purity of Ti 3 SiC 2 but also causes more impurities mainly TiC and SiC. But heat treatment at 1200 ° C increases the purity of Ti 3 SiC 2 . The mechanism that occurs in the 3Ti-Si-2C system is that first TiC is formed and its heat causes more mixing and the formation of Ti and Si melt. As the TiC process continues, it reacts with the Ti-Si melt to form Ti 3 SiC 2 .","PeriodicalId":167079,"journal":{"name":"Mechanic of Advanced and Smart Materials","volume":"57 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132783766","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A. Sadeghi, Adel Pour Esmaeil Fatideh, Matin Mohseni, Fatemeh Shahrizadegan
which is considered as a natural skin cell, using JPK atomic force microscope (made in Germany), Nano Wizard 3 in both extension and retraction modes, and obtained at a temperature of 37 degrees Celsius. Based on the results, the average elastic modulus for the cell in the extension mode (as the valid mode in the reports) is equal to 574.4 Pa . The adhesion force is equivalent to 2.112×10 -21 N in retraction mode. Based on images taken from the surface of the cell with an atomic force microscope, its maximum height is 0.4 micrometers.
{"title":"Defining of Mechanical Properties of Ago-1522 Living Cell Using Atomic Force Microscope","authors":"A. Sadeghi, Adel Pour Esmaeil Fatideh, Matin Mohseni, Fatemeh Shahrizadegan","doi":"10.52547/masm.2.1.1","DOIUrl":"https://doi.org/10.52547/masm.2.1.1","url":null,"abstract":"which is considered as a natural skin cell, using JPK atomic force microscope (made in Germany), Nano Wizard 3 in both extension and retraction modes, and obtained at a temperature of 37 degrees Celsius. Based on the results, the average elastic modulus for the cell in the extension mode (as the valid mode in the reports) is equal to 574.4 Pa . The adhesion force is equivalent to 2.112×10 -21 N in retraction mode. Based on images taken from the surface of the cell with an atomic force microscope, its maximum height is 0.4 micrometers.","PeriodicalId":167079,"journal":{"name":"Mechanic of Advanced and Smart Materials","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133376465","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Introduction 1. n recent years, with the increasing growth of various industries, the development of advanced industrial structures has been widely increased in many industries such as aerospace, turbines, reactors, and other rotary machines. One of the most applicable rotating structures in this type is rotating drum in air turbine engines, which is very important due to the thermo-mechanical loads applied on it. The drum is a rotary structure that in recent years has been widely used in various sectors such as aerospace industries and nuclear facilities and has a very similar geometry to a thick-walled circular cylinder. This structure is under thermo-mechanical loads. Analysis of rotating drum stresses and investigating effective parameters including loadings at inner and outer radius, rotating speed, and using advanced materials like FGMs instead of homogenous materials is very important in the design of air turbine engine drums. A bunch of useful materials are FGM materials with a non-homogeneous coefficient which is suitable for redesigning a drum with lower stresses and higher safety factor. FGM materials are special types of composites and their properties can change steady and slowly in one or more arbitrary directions. These materials have high mechanical strength at high temperatures against applied loads, which makes them an appropriate selection in the above activity. In 2013, the elastic analysis of the FGM thick-walled cylindrical pressure vessels was analytically investigated [10]. In I 107 B. Shahriari, M. S. Sadeghi Nezhad Mechanics of Advanced and Smart Materials Journal Vol.1, Issue 2, (2022) 106 – 135 2015, thermoelastic analysis of a hollow circular cylinder for an FGM material with arbitrary properties distribution was studied [16]. In 2018, an investigation on an FGM rotating disk considering arbitrary changes in material properties and using the finite element method is carried out [19]. In this paper, analyzing a rotary drum and investigation on effective parameters including rotating speed, types of loading carrying on internal and external surfaces, thickness, and type of material has been studied. In order to investigate the drum, a thermoelastic analytical solution is performed for both homogenous and FGM states under internal and external loading conditions. The material properties are assumed to vary nonlinearly in the radial direction and the Poisson’s ratio is assumed constant. At first, differential equation of motion for FGM material is derived by assuming the properties functions exponentially and thermal gradients as an arbitrary function of radius. Then the equation is solved analytically using MATLAB engineering software. Stresses and displacements were calculated in clamp-clamp ends boundary conditions. Then, the governing thermal differential equation of the drum was solved and the response was replaced with an arbitrary thermal function considered at first stage of the analysis. After calculating the dis
介绍1。近年来，随着各行业的日益增长，先进产业结构的发展在航空航天、涡轮、反应器等旋转机械等许多行业得到了广泛的加强。在这种类型的旋转结构中，最适用的是空气涡轮发动机的旋转鼓，由于其上施加的热机械载荷，它非常重要。鼓是一种旋转结构，近年来已广泛应用于航空航天工业和核设施等各个部门，其几何形状与厚壁圆柱非常相似。该结构承受热机械载荷。在空气涡轮发动机转鼓的设计中，分析转鼓的应力并研究其有效参数，包括内外半径载荷、转速，以及采用先进材料如fgm代替均质材料是非常重要的。一堆有用的材料是具有非均匀系数的FGM材料，适合重新设计具有较低应力和较高安全系数的转鼓。FGM材料是一种特殊类型的复合材料，其性能可以在一个或多个任意方向上稳定缓慢地变化。这些材料在高温下对施加的载荷具有很高的机械强度，这使它们成为上述活动的适当选择。2013年，对FGM厚壁圆柱形压力容器的弹性分析进行了解析研究。[j]. [j]. Shahriari, M. S. Sadeghi Nezhad，先进与智能材料力学，Vol.1，第2期，(2022):106 - 135 2015，研究了具有任意性能分布的FGM材料的空心圆柱体热弹性分析[j]。2018年，采用有限元方法对考虑材料性能任意变化的FGM旋转盘进行了研究。本文对旋转滚筒进行了分析，并对转速、内外表面载荷类型、厚度、物料类型等有效参数进行了研究。为了研究鼓，在内外载荷条件下对均匀和FGM状态进行了热弹性分析。假定材料的性质沿径向呈非线性变化，泊松比为常数。首先，假设FGM材料的性能是指数函数，热梯度是半径的任意函数，推导了FGM材料的运动微分方程。然后利用MATLAB工程软件对方程进行解析求解。计算了夹头-夹头边界条件下的应力和位移。然后，求解鼓体的控制热微分方程，并将响应替换为分析第一阶段时考虑的任意热函数。在计算了鼓在FGM和均匀状态下的位移和应力后，进行了有效参数的研究。研究了均匀和非均匀系数FGM在相同工况下，不同参数值对应力和位移的影响，包括转速、大小和内外表面加载类型的变化。结果清楚地表明，加载条件、转鼓转速和材料部署对改善转鼓性能有显著影响。方法2。所研究的FGM厚壁转鼓在期望加载条件下的示意图如图1所示。图1所示。内、外载荷作用下厚壁转鼓的表示通过在径向上应用平衡关系，得到转鼓内部运动的控制平衡方程为:考虑FGM状态下的鼓体性能函数，包括弹性模量、密度、热膨胀系数、导热系数、屈服强度，将其视为指数函数，径向变量如下:
{"title":"Investigation on Effective Factors in Thermoelastic Analysis of FGM Rotating Drum in Air Turbine Engine under Nonlinear Thermal Loading","authors":"B. Shahriari, M. S. Sadeghi Nezhad","doi":"10.52547/masm.1.2.106","DOIUrl":"https://doi.org/10.52547/masm.1.2.106","url":null,"abstract":"Introduction 1. n recent years, with the increasing growth of various industries, the development of advanced industrial structures has been widely increased in many industries such as aerospace, turbines, reactors, and other rotary machines. One of the most applicable rotating structures in this type is rotating drum in air turbine engines, which is very important due to the thermo-mechanical loads applied on it. The drum is a rotary structure that in recent years has been widely used in various sectors such as aerospace industries and nuclear facilities and has a very similar geometry to a thick-walled circular cylinder. This structure is under thermo-mechanical loads. Analysis of rotating drum stresses and investigating effective parameters including loadings at inner and outer radius, rotating speed, and using advanced materials like FGMs instead of homogenous materials is very important in the design of air turbine engine drums. A bunch of useful materials are FGM materials with a non-homogeneous coefficient which is suitable for redesigning a drum with lower stresses and higher safety factor. FGM materials are special types of composites and their properties can change steady and slowly in one or more arbitrary directions. These materials have high mechanical strength at high temperatures against applied loads, which makes them an appropriate selection in the above activity. In 2013, the elastic analysis of the FGM thick-walled cylindrical pressure vessels was analytically investigated [10]. In I 107 B. Shahriari, M. S. Sadeghi Nezhad Mechanics of Advanced and Smart Materials Journal Vol.1, Issue 2, (2022) 106 – 135 2015, thermoelastic analysis of a hollow circular cylinder for an FGM material with arbitrary properties distribution was studied [16]. In 2018, an investigation on an FGM rotating disk considering arbitrary changes in material properties and using the finite element method is carried out [19]. In this paper, analyzing a rotary drum and investigation on effective parameters including rotating speed, types of loading carrying on internal and external surfaces, thickness, and type of material has been studied. In order to investigate the drum, a thermoelastic analytical solution is performed for both homogenous and FGM states under internal and external loading conditions. The material properties are assumed to vary nonlinearly in the radial direction and the Poisson’s ratio is assumed constant. At first, differential equation of motion for FGM material is derived by assuming the properties functions exponentially and thermal gradients as an arbitrary function of radius. Then the equation is solved analytically using MATLAB engineering software. Stresses and displacements were calculated in clamp-clamp ends boundary conditions. Then, the governing thermal differential equation of the drum was solved and the response was replaced with an arbitrary thermal function considered at first stage of the analysis. After calculating the dis","PeriodicalId":167079,"journal":{"name":"Mechanic of Advanced and Smart Materials","volume":"16 3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125972114","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
In the current paper, the piezoelectric energy harvesting of inhomogeneous beams based on modified beam models is studied. Different classical boundary conditions, which are combination of free, simply and clamped, are contemplated for the structure. The beam mechanical properties are assumed to vary based on the power law along the thickness direction in which volume fractions of the ceramic and metal part can be adjusted using FG parameter. Here, various beam theories such as Euler-Bernoulli, exponential, trigonometric, hyperbolic and fifth-order are modelled using a unified formulation. These beam theories are capable of catching rotary inertia effects and transverse shear deformations. The vibrational performance of the beam is affected by the harmonic vibrations of the base. Additionally, two different types of damping including structural damping and viscous damping are modelled in the current formulation. Transverse deflection of the beam is obtained using modal expansion and then electrical power, current and voltage outputs are calculated. Ultimately, in the discussion section, the impacts of different parameters on the vibration and energy harvesting of the beam are analyzed.
{"title":"Piezoelectric Energy Harvesting from Functionally Graded Beams Using Modified Shear Deformation Theories","authors":"K. Khorshidi, M. Karimi, Mehdi Rezaeisaray","doi":"10.52547/masm.1.2.136","DOIUrl":"https://doi.org/10.52547/masm.1.2.136","url":null,"abstract":"In the current paper, the piezoelectric energy harvesting of inhomogeneous beams based on modified beam models is studied. Different classical boundary conditions, which are combination of free, simply and clamped, are contemplated for the structure. The beam mechanical properties are assumed to vary based on the power law along the thickness direction in which volume fractions of the ceramic and metal part can be adjusted using FG parameter. Here, various beam theories such as Euler-Bernoulli, exponential, trigonometric, hyperbolic and fifth-order are modelled using a unified formulation. These beam theories are capable of catching rotary inertia effects and transverse shear deformations. The vibrational performance of the beam is affected by the harmonic vibrations of the base. Additionally, two different types of damping including structural damping and viscous damping are modelled in the current formulation. Transverse deflection of the beam is obtained using modal expansion and then electrical power, current and voltage outputs are calculated. Ultimately, in the discussion section, the impacts of different parameters on the vibration and energy harvesting of the beam are analyzed.","PeriodicalId":167079,"journal":{"name":"Mechanic of Advanced and Smart Materials","volume":"103 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117293848","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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