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首页> 外文期刊>International journal of mechanics and materials in design >A finite element computational framework for enhanced photostrictive performance in 0-3 composites
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A finite element computational framework for enhanced photostrictive performance in 0-3 composites

机译：有限元计算框架，用于在0-3复合材料中提高可照片性能

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摘要

Photostriction is a multiphysics phenomenon comprising of both photovoltaic effect and converse piezoelectric effect. The extensively researched photostrictive material is lead lanthanum zirconate titanate, i.e., Pb0.92La0.08(Zr0.65Ti0.35)(0.98)O-3 (PLZT) ceramic. In contrast to the traditional approaches of improving deflection response, the current study proposes a 0-3 composite model to substantially enhance the effective material properties, which in turn significantly improves the deflection response. A computational framework based on finite element analysis is employed to 0-3 photostrictive composite of PLZT as matrix and Pb(Mg1/3Nb2/3)O-3-0.35PbTiO(3) (PMN-35PT) as the inclusions. The representative volume element (RVE) or unit cell technique is used to incorporate the local variation of constituent properties and to calculate photostrictive properties such as effective elastic, dielectric, piezoelectric, and pyroelectric properties. An opto-electro-thermo-mechanical finite element formulation was engaged to get the actuation response of photostrictive material bonded to cantilever and simply supported beam. The maximum deflection for cantilever beam attached to photostrictive composite patch having 25% inclusions volume fraction in 0-3 composite is found to be 38% more in comparison to pure PLZT material. It is established that the opto-electro-mechanical 0-3 composite actuators possess high potential in lightweight, compact and wireless actuation applications.
机译：光照是一种多体性现象，包括光伏效应和逆转压电效应。广泛研究的可照性材料是锆锆钛酸镧，即PB0.92LA0.08（Zr0.65Ti0.35）（0.98）O-3（PLZT）陶瓷。与改进偏转响应的传统方法相比，目前的研究提出了0-3个复合模型，以大大提高有效材料特性，这又显着提高了偏转响应。基于有限元分析的计算框架用于PLZT作为矩阵的0-3个可照处复合物和PB（MG1 / 3NB2 / 3）O-3-0.35PBTIO（3）（PMN-35pt）作为夹杂物。代表性体积元件（RVE）或单位电池技术用于掺入构成性质的局部变化，并计算有效弹性，电介质，压电和热电学性质的可吸收性质。接合光电热热机械有限元配方，以获得粘合到悬臂的可照处材料的致动响应，并简单地支撑梁。与纯PLZT材料相比，悬臂上附着于具有25％夹杂物体积分数的可照子复合贴片的最大偏转率为38％。建立光电机械0-3复合致动器在轻质，紧凑和无线致动应用中具有高潜力。

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