Failure criteria for unidirectional fiber composites

Abstract

Three-dimensional failure criteria of unidirectional fiber composites are established in terms of quadratic stress polynomials which are expressed in terms of the transversely isotropic invariants of the applied average stress state. Four distinct failure modes-tensile and compressive fiber and matrix modes-are modeled separately, resulting in a piecewise smooth failure surface. © 1980 by ASME.