Paper number 1307

STRESS BASED YIELD/FAILURE CRITERIA FOR FIBER COMPOSITES

R. M. Christensen

Lawrence Livermore National Laboratory, P.O. Box 808, L-355, Livermore, CA 94550, USA
Stanford University, Stanford, CA 94305, USA

Summary

In the present work a new theory of yielding and failure is derived for fiber composite materials. The importance of this general area is underscored by the high degree of activity that has been expended over the past 30 years or so in searching for the elusive "best" formulation. The difficulty of the search is evident from the multitude of empirical approaches that have been offered. The approach given here stresses the need to derive the governing forms from some basic physical postulations. In performing this derivation, a balance is sought between achieving the maximum generality and minimizing the number of materials parameters that must be experimentally evaluated for applications to any particular material system.

Keywords

failure criteria, yield conditions, fiber composites.