摘要
采用概率逐步失效法评估带有初始缺陷的复合材料层合板承受轴向载荷时的可靠性 .初始缺陷和强度参数为设计变量 ,采用一阶矩法计算单元层的失效概率 .在某一单元层失效后修改层合板的刚度 ,然后重新分析直到结构最终破坏 ,得到系统的概率失效序列 .系统的失效概率通过主要失效序列来评估 .
A probabilistic progressive failure analysis method is applied to estimating the reliability of a simply supported laminated composite plate with an initial imperfection under bi-axial compression load. The initial imperfection and the strength parameters are considered as random variables. Ply-level failure probability is evaluated by the first order reliability method. The stiffnesses are modified to reflect the damage and the structure is reanalyzed until the last ply fails, so the significant failure sequences are obtained. The system failure probability is estimated through the union of significant failure sequences. A numerical example is presented to demonstrate the methodology proposed.
出处
《武汉理工大学学报（交通科学与工程版）》
北大核心
2004年第6期863-865,925,共4页
Journal of Wuhan University of Technology（Transportation Science & Engineering）
关键词
失效序列
层合板
可靠性
一阶矩法
failure sequences
laminated plate
structural reliability
first order reliability method
