Residual Strength of Stitched Laminates After Low Velocity Impact
Residual Strength of Stitched Laminates After Low Velocity Impact
复制标题
低速冲击后缝合层压板的残余强度
DOI：
10.1177/0731684408090368
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发表时间：
2009-07-01
影响因子：
3.1
通讯作者：
Li Zhengneng
中科院分区：
文献类型：
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作者：
Cheng Xiaoquan;Al-Mansour, Ali;Li Zhengneng
用缝合层合板进行测试，以计算缝合层合板的CAI（冲击后压缩）强度和TAI（冲击后拉伸）强度。使用了两个水平的低速冲击能量。所有的试样由两种不同类型的铺叠顺序层压板制成，具有三个不同的缝合方向0度，45度和90度。利用MSC/PATRAN软件建立了缝纫层合板CAI和TAI强度的有限元模型。采用点应力准则（PS准则）和损伤区纤维断裂准则（FD准则）预测CAI强度。结果表明，预测的残余强度与试验结果吻合较好。缝合提高了层压板的剩余强度。
Tests were conducted with stitched laminates in order to calculate CAI (compression after impact) strength and TAI (tension after impact) strength for stitched laminates. Two levels of low velocity impact energy were used. All the specimens were made of two different types of lay-up sequence laminates with three different stitching directions of 0 degrees, 45 degrees, and 90 degrees. FEM model was developed using MSC/PATRAN software to predict the CAI and TAI strength of stitched laminates. PS criterion (point stress) and FD criterion (fiber breakage in damage zone) were applied to predict CAI strength. It showed that the predicted residual strengths were in agreement with the test results. Stitching improves the residual strength of the laminates.