TY - JOUR
T1 - Damage development and property degradation in composite materials
AU - Daniel, Isaac M
AU - Lee, J. W.
AU - Yaniv, G.
PY - 1988/12/1
Y1 - 1988/12/1
N2 - Damage mechanisms and accumulation and associated stiffness reductions were investigated in crossply graphite/epoxy laminates subjected to tensile cyclic loading. Damage development consists of transverse matrix cracking, followed by longitudinal matrix cracking, local delaminations at crack intersections, and ultimately longitudinal fiber fractures of the primary load carrying plies. The reduction in axial modulus, even in normalized form, is a function of the cyclic stress level. The degradation of in-plane shear modulus was also monitored and found to be highly sensitive to longitudinal matrix cracking. The relationship between stiffness degradation and residual fatigue life was discussed.
AB - Damage mechanisms and accumulation and associated stiffness reductions were investigated in crossply graphite/epoxy laminates subjected to tensile cyclic loading. Damage development consists of transverse matrix cracking, followed by longitudinal matrix cracking, local delaminations at crack intersections, and ultimately longitudinal fiber fractures of the primary load carrying plies. The reduction in axial modulus, even in normalized form, is a function of the cyclic stress level. The degradation of in-plane shear modulus was also monitored and found to be highly sensitive to longitudinal matrix cracking. The relationship between stiffness degradation and residual fatigue life was discussed.
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M3 - Article
AN - SCOPUS:0024140465
SN - 0160-8835
VL - 92
SP - 149
EP - 160
JO - American Society of Mechanical Engineers, Applied Mechanics Division, AMD
JF - American Society of Mechanical Engineers, Applied Mechanics Division, AMD
ER -