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中文摘要：
考虑湿热条件、横向剪切变形、几何非线性和压电效应的影响，建立具脱层压电层合梁的本构关系和非线性平衡微分方程，采用有限差分法和迭代法对问题进行求解；在此基础上，应用Griffith准则，导出了脱层前缘处的能量释放率表达式，讨论了不同因素对压电层合梁后屈曲性能和脱层扩展的影响．
英文摘要：
Considering the effect of hygrothermal environments,transverse shear deformation,geometrical nonlinearity and piezoelectricity, the constitutive relations and the nonlinear equilibrium equations of piezoelectric laminated beams with delamination are obtained. The finite difference method and the iterative technique arc used to solve the problems under consideration. Then, the expressions of energy release rate at the delamination front are obtained according to the Griffith criterion. The effects of various factors on the postbuckling behavior and delamination growth for the laminated beams are discussed in detail.
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