Engineering the translaminar fracture behaviour of thin-ply composites

Engineering the translaminar fracture behaviour of thin-ply composites
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设计薄层复合材料的跨层断裂行为

DOI:
10.1016/j.compscitech.2016.06.002
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发表时间:
2016
影响因子:
9.1
通讯作者:
Bullegas G
Bullegas G
中科院分区:
材料科学1区
文献类型:
--
作者:
Bullegas G

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生物启发模式的微切垂直于纤维方向的薄层CFRP层压板已被用来增加跨层断裂韧性的材料。建立了预测跨层裂纹扩展过程中纤维束拔出概率的分析模型,并通过实验参数研究进行了验证。该模型被用来设计三个层次模式的微切割和模式已被测试使用紧凑的拉伸试样。当与基线材料相比时,三种图案的断裂韧性的增加分别为+15%、+60%和+214%,从而证明了通过精心设计的微切口图案来工程化CFRP中的断裂表面以提高材料的损伤容限的潜力。
Bio-inspired patterns of micro-cuts perpendicular to the fibre direction in thin-ply CFRP laminates have been used to increase the translaminar fracture toughness of the material. An analytical model to predict the probability of bundle pull-out during translaminar crack propagation was developed and validated through an experimental parametric study. The model was used to design three hierarchical patterns of micro-cuts and the patterns have been tested using Compact Tension specimens. The increase in fracture toughness for the three patterns was +15%, +60% and +214% when compared with the baseline material, thereby demonstrating the potential of engineering the fracture surface in CFRPs through well-designed patterns of micro-cuts to improve the damage tolerance of the material.
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