Sensing delamination in a carbon fiber polymer-matrix composite during fatigue by electrical resistance measurement

被引:85
作者
Wang, XJ [1 ]
Chung, DDL [1 ]
机构
[1] SUNY Buffalo, Composite Mat Res Lab, Buffalo, NY 14260 USA
关键词
D O I
10.1002/pc.10322
中图分类号
TB33 [复合材料];
学科分类号
摘要
Delamination in a crossply [0/90] continuous carbon fiber polymer-matrix composite was sensed in real time during fatigue by measuring the electrical resistance of the composite in the through-thickness direction. Upon O degrees tension-tension fatigue at a maximum stress of 57% of the fracture stress, the resistance irreversibly increased both in spurts and continuously, because of delamination, which started at 33% of the fatigue life. The resistance increased upon loading and decreased upon subsequent unloading in every cycle, thereby allowing strain sensing. The minimum resistance at the end of a cycle irreversibly increased during the first 0.1% of the fatigue life. The resistance became noisy starting at 62% of the fatigue Life, at which delamination occurred rapidly and the fraction of laminate area delaminated reached 4.3%.
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页码:692 / 700
页数:9
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