DELAMINATION GROWTH IN COMPOSITE LAMINATES
含分层损伤复合材料层合板分层扩展研究

Under compressive load, delaminated composite plates may undergo postbuckling that can lead to delamination growth. The Mindlin plate finite element is used to analysis delamination growth in composite laminates with an elliptical delamination. The total strain energy release rate, which is used as the criteria of delamination growth, is calculated with the aid of the virtual crack closure technology (VCCT). The delamination growth behavior is modeled with self-adaptive grid moving technology and considering contact effect at the delamination front. The main issue concerns the effect of the delamination shape and the boundary condition on the delamination growth behavior. The results show that the delamination growth behavior is affected significantly by the shape of delamination.