Local strain re-distribution and stiffness degradation in cross-ply polymer composites under tension

被引:27
作者
Katerelos, DG
McCartney, LN
Galiotis, C
机构
[1] Inst Chem Engn & High Temp Chem Proc, Fdn Res & Technol Hellas, GR-26504 Patras, Greece
[2] Natl Phys Lab, NPL Mat Ctr, Teddington TW11 0LW, Middx, England
[3] Univ Patras, Dept Mat Sci, GR-26504 Patras, Greece
关键词
Raman spectroscopy; polymer matrix composites; damage; non-destructive testing; modeling;
D O I
10.1016/j.actamat.2005.03.045
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Individual aramid Kevlar (R) 49 fibers were embedded into the 0 degrees ply of transparent cross-ply glass fiber reinforced polymer (GFRP) laminates and used as Raman sensors for the monitoring of the local strain field due to matrix cracking under quasi-static loading. The sensors were placed near the 0/90 interface, and the resulting strain within the 0 degrees ply and its dependence on the geometry of the specimen due to 90 degrees cracking were recorded. The decay of the strain magnification with the distance from the crack front, the residual strain and the axial modulus of elasticity reduction were derived from the strain distributions at each separate level of loading. The results obtained were compared with shear-lag calculations as well as numerical and analytical models. (c) 2005 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码:3335 / 3343
页数:9
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