湿热条件下具脱层压电层合梁的后屈曲及脱层扩展分析  

ANALYSIS OF POSTBUCKLING AND DELAMINATION GROWTH FOR DELAMINATED PIEZOELECTRIC LAMINATED BEAMS UNDER HYGROTHERMAL CONDITIONS

作　　者：傅衣铭[1] 李盈利[1] 

机构地区：[1]湖南大学力学与航空航天学院,长沙410082

出　　处：《固体力学学报》2009年第3期309-317,共9页Chinese Journal of Solid Mechanics

基　　金：国家自然科学基金项目(10572049)资助

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.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.

关 键 词：湿热条件 横向剪切变形 压电效应 后屈曲 脱层扩展 

分 类 号：TM22[一般工业技术—材料科学与工程]