A general anisotropic damage theory of cracked laminates is formulated here.The deformationof composite laminates is composed of matrix elastic strains,pseudo-elastic damage strains due to crackingand permanent damage strains due to interlaminar slip.The surface of damage initiation is constructed accord-ing to the concept of linear elastic fracture mechanics for the virgin material.After the initial damage,apesudo-elastic damage can be used to describe the damage behaviour if interlaminar slip is negligible.Damageevolution,load induced anisotropy and interlaminar-intralaminar interaction for composite laminates are exam-ined;the latter can perturb the normality structure of damage strain rate.Explicit expressions are given forpseudo-elastic (or secant) moduli of the damaging composite laminates,under a non-interacting assumptionimposed on the cracks between different families.
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页码:335 / 343
页数:9
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Laws,N.,Dvorak,G. J. Int. J. Solids & Struct . 1987