红外辐射作用下热力电耦合层合板壳的脱层屈曲及响应研究

项目名称： 红外辐射作用下热力电耦合层合板壳的脱层屈曲及响应研究

项目编号： No.11202144

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 数理科学和化学

项目作者： 杨昌锦

作者单位： 苏州大学

项目金额： 30万元

中文摘要： 微机电系统、功能涂层、红外探测器悬臂微桥等智能层合结构，实现功能转换，但层间脱层损伤严重影响结构使用。本项目应用智能材料热力电耦合本构关系、有限变形理论及奇异积分方程理论，对热力电耦合智能层合板壳在红外辐射作用下层间脱层屈曲问题进行研究，主要有：（1）对半无限智能材料基体（如PZT）与上金属层（如Pt）间的圆形、椭圆形等比较规则脱层形状及其临界载荷进行研究，重点研究智能材料层的热电及压电效应对脱层屈曲临界载荷的影响；（2）对有限厚智能材料层板两侧均存在金属层电极，及其他层构成的多层层合结构，当电极出现圆形、椭圆等规则脱层时的临界屈曲载荷，研究电极层间电场强度对脱层屈曲载荷的影响；（3）研究脱层尖端应力强度因子与脱层几何参数，结构材料参数，热力电等多场耦合的相互关系；（4）研究层间梯度层梯度参数与临界载荷、SIF等相互关系，智能层合器件出现脱层时信号响应。本项目为进一步研究损伤评估奠定基础。

中文关键词： 多层智能结构；功能梯度梁；力电耦合；奇异积分方程组；脱层屈曲

英文摘要： Smart structures such as Micro-Electro-Mechanical Systems(MEMS), functionally coating, and infrared detectors etc. are all multilayered structures which can realize energy exchange and transformation. But the delaminate damage can seriously effect their performance. Delaminating buckling research of the smart electro-thermo-mechanical coupling laminate structures applying the coupled constitutive relation of the smart material, finite deformation theory, and singular integral equation theory is the main content in this project including four aspects as follows: (1) Determination of the critical loading of buckling for penny-shaped and ellipse-shaped delaminating between semi-infinite substrate of smart material (such as PZT) and its metallic coating (such as Pt). The research is focused on the influence of the thermoelectric effect and the piezoelectric effect of the smart material on the critical loads of buckling. (2) Determination of the critical loading of buckling for penny-shaped and ellipse-shaped delaminating in the interface of the smart material panel and the metallic electrodes. Research is focused on the influence of the electric field on the critical loads of buckling. (3) Research of the mutual relations of the stress intensity factor (SIF) at the tip of the delaminate, geometrical parameters of th

英文关键词： Multilayer smart structure；functionally graded beam；Electro-mechanical Coupling；singular integral equations；delamination buckling