复合材料阶梯形胶接接头渐进损伤分析  

Progressive Damage Analysis for Stepped-Lap Joints of Adhesive-Bonded Composite

作　　者：乔玉[1] 周光明[1] 刘伟先[1] 陶伊凡 

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

出　　处：《南京航空航天大学学报》2014年第4期632-637,共6页Journal of Nanjing University of Aeronautics & Astronautics

基　　金：江苏高校优势学科建设工程资助项目

摘　　要：建立了复合材料层合板双阶梯形胶接接头的三维(3D)有限元模型,并进行了拉伸载荷下的渐进损伤分析(Progressive damage analysis,PDA)。采用含正交各向异性损伤的连续介质损伤力学(Continuum damage mechanics,CDM)本构方程对层合板进行描述。采用粘聚区模型(Cohesive zone model,CZM)对共胶接界面进行模拟。引入合适的损伤起始和损伤扩展准则,预测了双阶梯形胶接接头的损伤扩展方式和连接效率。进一步讨论了台阶长度、外加铺层搭接长度及厚度对失效模式及连接效率的影响。A three-dimensional （3D） finite element model is established for the progressive damage analysis （PDA） of the double-stepped-lap joints of adhesive-bonded composite under tensile loading.The laminate is modeled with the constitutive equations of continuum damage mechanics （CDM） in an orthotropic damage.The co-bonding layer is simulated by the cohesive zone model （CZM）.Appropriate criterions are chosen to predict the initiation and progression of the damage.The failure modes and bonding efficiency of the double stepped-lap joints are predicted.Also,the effects of various parameters,such as step length,overlap length and thickness of the additional plies on the failure modes and bonding efficiency are investigated.

关 键 词：复合材料 阶梯形接头 渐进损伤分析 粘聚区模型 连接效率 

分 类 号：TB332[一般工业技术—材料科学与工程]