摘要
本文运用弹塑性有限变形理论讨论了受压层合圆板层间剥离的扩展。初始缺陷的层间裂纹有一段稳定期,当压缩量超过临界值后,裂纹首先在缺陷层内迅速扩展并很快涉及邻近的各层。文中给出了裂纹扩展情况及应力分布的有限元模拟结果。将剥离后的基体层用小模量的弹性体替代,可避免确定剥离面分离或接触的难点,使计算大为简化。
In this paper, the dislamination, crack growth and propagation between layers of a laminated circular plate subjected uniform pressure is investigated by virtue of the elastic-plastic theory with finite deformation. The crack of initial imperfection has a critical one, firstly the crack grows in the imperfect layer then it propagats to the nearest layers rapidly. The simulation results of a crack growth and its stress dislaminated matrix layers are simplified as an elastic material with small modulus, then the difficulties of defining the separation or contact of the dislaminated interfaces could be avoided, the cost of the numerical calculation is reduced considerably.
出处
《复合材料学报》
EI
CAS
CSCD
北大核心
1992年第3期51-57,共7页
Acta Materiae Compositae Sinica
基金
国家自然科学基金
关键词
剥离
弹塑性
有限元
复合材料
层板
laminated plate
dislamination
finite deformation
clasticplastic finite element
