粘接结构胶层热应力分布影响因素  

Influence Factors of Thermal Stress Distribution on Resin Layer of Bonded Structure

作　　者：吴楠 周光明[1] 蔡登安[1] 钱元[2] WU Nan;ZHOU Guangming;CAI Deng’an;QIAN Yuan(State Key Laboratory of Mechanics and Control of Mechanical Structures,Nanjing University of Aeronautics&Astronautics,Nanjing,210016,China;Purple Mountain Observatory,Chinese Academy of Sciences,Nanjing,210008,China)

机构地区：[1]南京航空航天大学机械结构力学及控制国家重点实验室,南京210016 [2]中国科学院紫金山天文台,南京210008

出　　处：《南京航空航天大学学报》2020年第1期66-72,共7页Journal of Nanjing University of Aeronautics & Astronautics

基　　金：南京航空航天大学(实验室)开放基金(kfjj20180107)资助项目;上海航天科技创新基金(SAST2018-071)资助项目;江苏省基础研究计划(自然科学基金)(BK20190394)资助项目;江苏高校优势学科建设工程资助项目。

摘　　要：通过建立粘接结构的有限元模型来研究温度变化引起的粘接结构中胶层的热应力分布情况。通过胶层应变测试试验,对比胶层侧边中点及端点处的应变与仿真结果的差异,验证有限元仿真结果的可靠性。研究了多种因素,包括胶层厚度、胶层两侧被粘接材料的热膨胀系数的差异和被粘接材料的刚度的变化对胶层热应力分布的影响规律。最后探讨了大温差环境中使用的粘接结构在设计过程中需考虑胶层的热应力来选取胶层的厚度及被粘接材料。The thermal stress distribution of adhesive layer in bonded structures is studied by establishing a finite element model(FEM).Through the environmental test of the adhesive layer,the difference between the strain at the middle point and the end point of the adhesive layer and the simulation results is compared,and the reliability of the finite element simulation results is verified.The influence of several factors,such as the thickness of the adhesive layer,the difference of the coefficient of thermal expansion(CTE)of the bonded materials on both sides of the adhesive layer and the change of stiffness of the bonded materials,on the thermal stress distribution of the adhesive layer is studied.Finally,for the adhesive structure that needs to be used in the environment with large temperature span,the thickness of the adhesive layer and the type of bonding materials should be selected by considering the thermal stress damage of the adhesive layer.

关 键 词：粘接结构 胶层 热应力 有限元模型 

分 类 号：TB332[一般工业技术—材料科学与工程]