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., Pb_0.92La_0.08(Zr_0.65Ti_0.35)_0.98O₃ (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(Mg_1/3Nb_2/3)O₃-0.35PbTiO₃ (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.

光致伸缩是一种包括光伏效应和逆压电效应的多物理场现象。广泛研究的光致伸缩材料是锆钛酸铅镧，即Pb _0.92 La _0.08 (Zr _0.65 Ti _0.35 ) _0.98 O ₃ (PLZT)陶瓷。与传统的改善挠度响应的方法相比，当前的研究提出了一个 0-3 复合模型来显着增强有效材料特性，从而显着改善挠度响应。基于有限元分析的计算框架被用于 PLZT 为基体和 Pb(Mg _1/3 Nb _2/3)O ₃ -0.35PbTiO ₃(PMN-35PT) 作为夹杂物。具有代表性的体积元素（RVE）或晶胞技术用于结合组成特性的局部变化并计算光致伸缩特性，例如有效的弹性，介电，压电和热电特性。使用光-电-热-机械有限元公式来获得粘合到悬臂梁和简支梁上的光致伸缩材料的驱动响应。与纯 PLZT 材料相比，悬臂梁的最大挠度与 0-3 复合材料中夹杂物体积分数为 25% 的光致伸缩复合贴片的最大偏转相比增加了 38%。已确定光机电 0-3 复合执行器在轻巧、紧凑和无线驱动应用中具有很高的潜力。