基于VCCT的复合材料低周疲劳性能研究

LOW-CYCLE FATIGUE OF COMPOSITES BASED ON VCCT

基于VCCT建立复合材料低周疲劳模型,对层合板结构分层损伤进行疲劳寿命预测。采用ABAQUS软件通过直接循环法计算复合材料低周疲劳分层扩展情况,在模拟中指定分层扩展所沿的界面,基于VCCT可以计算界面单元裂纹尖端的断裂能量释放率,通过Paris准则来判断疲劳裂纹的产生和扩展。

A composite low-cycle fatigue analysis model,which can forecast delamination fatigue life of laminates,is created based on VCCT. Low-cycle fatigue of delamination growth is analyzed by ABAQUS with the method of direct cyclic approach,by first defining the interface through delamination,and the fracture energy release rates at the crack tips in the interface. Elements are calculated based on VCCT technique,and the onset and delamination growth are characterized using the Paris law.