Experimental and analytical results are presented for the post-failure behavior of unnotched quasi-isotropic glass-epoxy laminates. The analysis is based on a simplified tangent modulus method and a maximum stress ply failure criterion. Several ply failure models are considered, involving vari ous combinations of stiffness reduction. The most significant finding is that matrix failure in the 90° layers must be supplemented by reduction of E11 as a result of a fiber instability mode.
Get full access to this article
View all access options for this article.
References
1.
S.W. Tsai, and H.T. Hahn, "Failure Analysis of Composite Materials", Inelastic Behavior of Composite Materials, (C. T. Herakovich , ed.), Proc. 1975 ASME Winter Annual Meeting , Houston, TX, November 30 to December 5, 1975, p. 73-96.
2.
E.M. Wu , "Phenomenological Anisotropic Failure Criterion ", Composite Materials, ( G. P. Sendeckyj, ed.), Academic Press, New York, 1974.
