Progressive failure of 3-D textile composites under impact loadings
Progressive failure of 3-D textile composites under impact loadings
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DOI：
10.1016/j.compstruct.2017.02.067
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发表时间：
2017-05
影响因子：
6.3
通讯作者：
Zhongxiang Pan;B. Gu;B. Sun;J. Xiong
中科院分区：
文献类型：
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作者：
Zhongxiang Pan;B. Gu;B. Sun;J. Xiong
三维纺织结构复合材料动态破坏的研究进展还不够深入。本工作旨在利用高速成像系统研究三维编织、双轴向经编和角度交错编织复合材料在冲击载荷下的渐进破坏。实时图像是逐帧列出的，位于应力-应变曲线中。在灾难性破坏下，应力存在急剧下降和稳定下降两个阶段。这两个阶段揭示了渐进破坏中不同的损伤形态。对于面外冲击压缩，在没有灾难性破坏的情况下，由于增强体的结构回复，复合材料的回弹有限。如果发生灾难性破坏，复合材料结构将发生分裂。对于面内冲击压缩，三维编织、双轴向经编和角度交错编织结构在爆炸裂纹/剪切/分层破坏下保护自己不被彻底撕裂。
Progress of dynamic failure of 3-D textile structural composites have not been sufficiently studied. This work is aimed to investigate the progressive failure of 3-D braided, biaxial warp-knitted and angle-interlock woven composites by high-speed imaging system during impact loadings. Real-time images are listed frame by frame and located in stress-strain curves. There is a sharp decrease stage and a steady decrease stage in stress under catastrophic failures. These two stages reveal different damage morphologies in progressive failures. For the out-of-plane impact compression, if there is no catastrophic failure, composites get limited rebound because of structural recovery of their reinforcements. If catastrophic failure occurs, composite structures would be split. For the in-plane impact compression, the 3-D braided, biaxial warp-knitted and angle-interlock woven structures protect themselves from being thoroughly split under explosive cracks/shear/delamination failures.