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首页> 外文期刊>Journal of thermal stresses >DYNAMIC THERMAL POSTBUCKLING ANALYSIS OF SHEAR DEFORMABLE PIEZOELECTRIC-FGM CYLINDRICAL SHELLS
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DYNAMIC THERMAL POSTBUCKLING ANALYSIS OF SHEAR DEFORMABLE PIEZOELECTRIC-FGM CYLINDRICAL SHELLS

机译：剪切变形压电-FGM圆柱壳的动态热后屈曲分析

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摘要

Dynamic thermal posthuckling behavior of functionally graded cylindrical shells with surface-bonded piezoelectric actuators subjected to the combined action of thermal load and applied actuator voltage is studied. The shell material is graded across the thickness according to a power law. The material properties of the functionally graded cylindrical shells are considered to he temperature dependent. The theoretical formulations are based on the Sanders nonlinear kinematic relations, which account for the transverse shear strains, and the third-order shear deformation shell theory is employed. Hamilton's principle is used to derive the equations of motion governing piezoelectric FGM cylindrical shells, A finite difference approximation combined with the Runge-Kutta method is employed to predict the posthuckling equilibrium paths, and the dynamic buckling temperature difference is detected according to Budiansky's stability criterion. Numerical results are presented to demonstrate the effects of the applied actuator voltage, shell geometry, volume fraction exponent in the power-law variation of the FGM, and the temperature dependency of the material properties on the posthuckling behavior of the shell. The results for simpler states are validated with the known results in the literature.
机译：研究了带有热键载荷和施加的致动器电压的组合作用的具有表面键合压电致动器的功能梯度圆柱壳的动态热后突行为。外壳材料根据幂定律在整个厚度上分级。功能梯度圆柱壳的材料性能被认为与温度有关。理论公式基于Sanders非线性运动学关系，它考虑了横向剪切应变，并采用了三阶剪切变形壳理论。用汉密尔顿原理导出控制压电FGM圆柱壳的运动方程，结合Runge-Kutta方法进行有限差分逼近来预测后哈勃的平衡路径，并根据Budiansky的稳定性准则检测动态屈曲温差。数值结果表明了施加的执行器电压，壳体几何形状，FGM的幂律变化中的体积分数指数以及材料特性对壳体的后断裂行为的温度依赖性的影响。对于较简单状态的结果，已用文献中的已知结果进行了验证。

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