力电冲击荷载下PZT/复合材料梁界面断裂分析  

Interfacial fracture analysis of PZT/composite beams under electrical-mechanical impact loading

作　　者：白瑞祥[1] 王亮[1] 陈浩然[1] 

机构地区：[1]大连理工大学工业装备结构分析国家重点实验室,辽宁大连116024

出　　处：《大连理工大学学报》2013年第5期625-629,共5页Journal of Dalian University of Technology

基　　金：国家自然科学基金资助项目(10872038);中央高校基本科研业务费专项资金资助项目(DUT11ZD(G)01)

摘　　要：基于非线性有限元方法,对力电冲击荷载作用下PZT/复合材料梁界面断裂进行了研究.通过虚裂纹闭合技术计算了界面裂纹前缘的能量释放率随时间变化的响应曲线,并且采用接触单元防止PZT片和界面裂纹分层前缘的复合材料发生穿透,然后通过比较证明了该求解方法的有效性,最后通过典型算例讨论了压电效应、界面接触、电压、铺层角度和压电材料阻尼对界面动态能量释放率的影响.研究方法和结论对动态工况下PZT/复合材料界面止裂设计具有一定的参考价值.The interfacial fracture for a PZT/composite beam under electrical-mechanical impact loading is investigated based on a nonlinear finite element analysis method. Virtual crack closure technique is used to evaluate the energy release rate of crack tip with the time. Contact elements are set up on crack surface and in the area in contact under impact loading to prevent the penetration between PZT and composites. The comparison between present and literature results shows the validality of solution scheme. Numerical results are provided to show the effects of piezoelectricity, the contact of crack surface, voltage, the stack sequence of composites and damping of piezoelectric composites on the resulting interface dynamic energy release rate. The proposed method and conclusions provided would be a useful contribution for dynamic interface crack arresting design of PZT/composites.

关 键 词：压电复合材料 界面断裂 冲击 裂纹 力电耦合 

分 类 号：V214.8[航空宇航科学与技术—航空宇航推进理论与工程]