低速冲击下复合材料层合板损伤分析_温卫东.pdfVIP

6 材料工程 / 2007 年 7 期 低速冲击下复合材料层合板损伤分析 Damage Analysis of Laminated Composites Under Low Velocity Impact Loading 温卫东, 徐 颖, 崔海坡 ( 南京航空航天大学 能源与动力学院, 南京 210016) WEN Wei2dong, XU Ying, CU I H ai2po ( College of Ener gy and Power Engineering, N anjing University of Aeronautics and Astronautics, Nanjing 210016, China) 摘要: 根据低速冲击下复合材料层合板的分层损 伤机理, 发展 了一种 分层失 效准则, 该准 则同时 考虑了 层间拉 应力、层 间剪应力和基体开裂等因素对分层损伤的影响, 并在损伤分析中, 区分了冲击正面由挤压应力引起的纤 维挤压损伤和 冲 击背面由弯曲拉应力引起的纤维断裂损伤, 模拟 了纤维断裂、纤 维挤压、基体开裂、基体挤 压、分 层等五 种损伤 的起始 和 扩展过程, 完善了作者以前发展了低速冲击逐渐 累积损伤模型。通过与实验结果进行比较, 验证了模型的合理性 。 关键词: 低速冲击; 复合材料层合板; 失效准则; 逐渐损伤 中图分类号: TB33 文献标识码: A 文章编号: 100124381( 2007)0720006206 Abstr act: A new delamination criterion was proposed according to delamination damage mechanism under low velocity impact loading. T he influence of thr ough2thickness tensile stresses, interlaminar shear stresses and matrix cracking on delamination had been taken into consideration. The fiber crush2 ing caused by the crushing stresses of impact surface and fiber cracking ar oused by tensile str esses of impact back surface has been distinguished. T he initiation and propagation of fiber tensile failur e, fi2 ber compressive failure, matrix crushing, matr ix cracking and delamination were simulated in the im2 proved model. A good agreement was found between the predicted results and the test data. Key words: low velocity impact; laminated composite; failure criterion; progressive damage 复合材料层