含有小尺寸分层缺陷复合材料压力容器的应变响应及分析

Strain Response and Analysis of Pressure Vessels with Small Delamination Defects

采用乙烯基酯树脂预浸料,利用缠绕法制造了ECR耐腐蚀玻璃纤维增强环氧树脂基复合材料压力容器,在水压试验过程中基于电测法测量压力容器筒体的应变变化情况,结合Abaqus/Explicit有限元模拟重点预测了含有内部分层缺陷的压力容器在外载荷作用下的应变响应。试验和模拟结果表明:该有限元模型的结果与实验结果的相对误差小于12%;当含有内部分层缺陷(缺陷直径分别为10、20、30、40和50 mm)的复合材料压力容器受到位移载荷时,周向应变是主要应变,最大纵向应变和Mises应力位置与加载位置重合,且最大Mises应力随分层面积的增加而增大。

Using vinyl ester resin prepreg and winding method,a ECR corrosion resistant glass fiber reinforced epoxy resin matrix composite pressure vessel was manufactured.The strain variation of the pressure cylinder was measured in the hydraulic test using the electrical method.And the strain response of the pressure vessel with internal delamination defects under external loadings was predicted by Abaqus/Explicit finite element simulation.The experimental and simulation results show that the error between the results of the finite element model and the experimental results is less than 12%.When the composite pressure vessel containing internal delamination defects(defect diameter 10,20,30,40 and 50 mm)is subjected to displacement load,the circumferential strain is the main strain,the maximum longitudinal strain and Mises stress position coincide with the loading position,and the maximum Mises stress increases with the increasing delamination area.