纺织学报 ›› 2022, Vol. 43 ›› Issue (08): 74-79.doi: 10.13475/j.fzxb.20210505207
孙晓伦1,2, 陈利1,2, 张一帆1,2(), 李默涵1,2
SUN Xiaolun1,2, CHEN Li1,2, ZHANG Yifan1,2(), LI Mohan1,2
摘要:
为研究开孔尺寸对三维机织复合材料拉伸力学行为、破坏模式以及失效机制的影响规律,设计了3种不同孔径的三维机织复合材料试样,利用非接触全场应变测试系统和显微图像技术进行表征。结果表明:6、10、14 mm 的孔径对三维机织复合材料的拉伸模量几乎没有影响,开孔后全截面拉伸强度分别下降35.6%、44.5%和51.8%,但开孔后的净截面拉伸强度基本相同,与未开孔试样相比,平均拉伸强度下降约22.4%;未开孔试样的全场应变呈现均匀分布,而开孔试样在孔左右两侧呈现出应变集中;开孔试样的断口形貌相似,主要表现为经纱的断裂,并伴随有部分纱线的抽拔以及层间开裂。
中图分类号:
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