摘要
采用基于粘聚区模型(CZM)的粘接元方法对含分层缺陷复合材料层合板进行了分层扩展研究。在缺少材料层间试验数据的情形下,应用了一种参数估算法确定粘接元的界面强度和刚度,并计算得到了含分层缺陷复合材料层合板的分层起始及扩展载荷,计算结果与试验值吻合良好,验证了所用方法的有效性。在此基础上,分析了不同分层位置对分层屈曲载荷、分层起始及扩展载荷的影响,并讨论了铺层角度对分层扩展方向的影响。
The delamination propagation of composite laminate with delamination defects is investigated through cohesive element which is based on the theory of CZM model .A method of evaluating the parame-ters of cohesive element when the interface parameters are unknown is applied and the simulation results based on this method fit the experimental results well .With the foundation of the finite element model ver-ified above,the influence of different delamination location on the sublaminate buckling load ,delamina-tion initiation and propagation are analysed ,and the impact of ply orientation on the direction of delamina-tion propagation is discussed .
出处
《航空计算技术》
2014年第5期73-76,共4页
Aeronautical Computing Technique
基金
江苏高校优势学科建设工程项目资助
关键词
复合材料
层合板
分层缺陷
分层扩展
composite
laminate
delamination defects
delamination propagation
