ELASTOPLASTIC BEHAVIOR OF THERMOPLASTIC COMPOSITE LAMINATES UNDER CYCLIC LOADING

被引:30
作者
KENNY, JM [1 ]
MARCHETTI, M [1 ]
机构
[1] UNIV ROME,DEPT AEROSP,ROME,ITALY
关键词
D O I
10.1016/0263-8223(95)00052-6
中图分类号
O3 [力学];
学科分类号
08 ; 0801 ;
摘要
An experimental and numerical study of the elasto-plastic behavior of thermoplastic matrix composite laminates under static and cyclic loads is presented. Off-axis and angle ply specimens cut from laminates of poly(ether ether ketone) (PEEK) reinforced with continuous carbon fibers have been tested under cyclic sinusoidal tensile loads and the hysteresis loops have been monitored. A micro mechanical model, which includes a parabolic criteria based on the plastic behavior of the matrix, has been adopted to study the composite non-linear behavior and a correlation between plastic deformation and a strong rise of damping and temperature at high stresses is outlined. Good agreement is shown between theory and experimental results. The mathematical mdoel presented here can be used to predict the visco-elastic-plastic response of the material at high stresses and its influence in the fatigue damage.
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收藏
页码:375 / 382
页数:8
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