摘要
发展了一种基于物理机制的复合材料结构失效分析方法,方法包括建立基于物理机制的面内失效起始准则,和对应的连续型损伤演化方法,方法所需的材料参数都具有明确的物理意义,无需经验参数。对两种层合板的开孔拉伸试验进行了数值模拟,模拟结果表明基于物理机制的失效分析方法能很好的模拟层合板的失效起始和演化,预测结构的失效强度、失效过程及最终破坏模式与试验吻合较好。同时还发现,无论是纤维主导还是基体主导的破坏模式,层合板内都出现了不可忽视的大面积分层,在模拟失效时考虑分层十分必要。
A physically based failure analysis method for laminated composite structures was developed.The method includes a physically based intralaminar failure onset criteria and corresponding continuum based damage evolution law.All the parameters used in the method have physical meaning,no empirical parameters are needed. Two open hole tensile laminates were simulated.The results show that the developed method can reproduce the failure initiation and evolution well.The predicted failure strength and pattern correlate well with experimental observation.In addition,it was found that the laminates sustain large area of delamination no matter the laminate is fiber or matrix dominate failure mode.It is necessary to consider the delamination in failure analysis method.
出处
《复合材料学报》
EI
CAS
CSCD
北大核心
2013年第S1期158-162,共5页
Acta Materiae Compositae Sinica
基金
航空基金(20120953010)
关键词
复合材料层合板
原位效应
开孔拉伸
失效分析
分层
laminated composites
in-situ effect
open hole tension
failure analysis
delamination
