Fiber stacking sequence effects on impact damage dimensions

Tóm tắt

Predicting impact behavior on composite plate is important for application into real products. Using numerical simulation method (ABAQUS), damage initiation and damage propagation can be observed, evaluated and analyzed. However, the proposed model needs validating with experimental results to ensure the accuracy of simulations. It is employed by comparing with results of papers using models without cohesive elements [2,3]. Firstly, the impact simulation was carried out on a 16 ply-crossply [04/904]S CFRP. The composite plate has a circular shape subjected by the impact of a steel ball falling down without initial velocity from a given height. The material properties are taken from the specimens used in the litterature. After that, a cohesive zone is attached into the interfaces of the composite plate to model delamination phenomenon and to determine the best optimized fiber direction against impact among [04/154]S, [04/304]S, [04/454]S, [04/604]S and [04/904]S configurations and for different levels of impact energy. It is shown that the delamination shape obtained from the numerical model is similar to the experimental work. It has also been revealed that damage dimensions are maximum for [04/454]S and minimum for [04/904]S