Mode I delamination fatigue properties of interlayer-toughened CF/epoxy laminates
Mode I delamination fatigue properties of interlayer-toughened CF/epoxy laminates
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DOI：
10.1016/j.compscitech.2005.07.038
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发表时间：
2006-05-01
影响因子：
9.1
通讯作者：
Murakami, A
中科院分区：
文献类型：
--
作者：
Hojo, M;Matsuda, S;Murakami, A
研究了具有两种中间层/中间层的碳纤维/环氧树脂层板的I型分层疲劳裂纹扩展行为。一种是以聚酰胺细颗粒T80 OH/3900-2为非均质中间层，另一种是以新型热塑性树脂离聚物UT 500/111/离聚物为中间层。试验采用双悬臂梁试件进行。对于T80 OH/3900-2层合板，随着裂纹长度的增加，裂纹路径从异质层间区域（阶段I）转移到层间/基体层界面（阶段II）。T80 OH/3900-2层压板的抗分层疲劳裂纹扩展性比第一阶段的参考CFRP高约3倍。这一比例在第二阶段降至1.5倍。对于UT 500/111/离聚物层压板，保持高水平的疲劳裂纹扩展阻力，而不考虑裂纹长度。UT 500/111/离聚物层压板的阈值比基础UT 500/111层压板高约3倍。在断口观察和机理分析的基础上，对这些层间/夹层复合材料的增韧机理差异进行了探讨。(c)2005爱思唯尔有限公司保留所有权利。
Mode I delamination fatigue crack growth behavior was investigated in carbon fiber (CF)/epoxy laminates with two kinds of interlayer/interleaf. One was with heterogeneous interlayer with fine polyamide particles, T80OH/3900-2, and the other was with interleaf of new types of thermoplastic resin, ionomer, UT500/111/ionomer. Tests were carried out using double cantilever beam specimens. For T80OH/3900-2 laminates, the crack path shifted from the heterogeneous interlayer region (Stage I) to the interlayer/base lamina interface (Stage II) with the increase of the crack length. The delamination fatigue crack growth resistance of the T80OH/3900-2 laminates was about 3 times higher than that of the reference CFRP for Stage I. This ratio decreased to 1.5 times for Stage II. For UT500/111/ionomer laminates, the high level of the fatigue crack growth resistance was kept without respect to the crack length. The threshold value of UT500/111/ionomer laminates was about 3 times higher than base UT500/111 laminates. The mechanism of the difference of the toughening mechanism for these interlayer/interleaf laminates was discussed on the bases of fractrographic observation and mechanism consideration. (c) 2005 Elsevier Ltd. All rights reserved.