Accession Number:

ADA232238

Title:

Tensor Transformations and Failure Criteria for the Analysis of Fiber Composite Materials

Descriptive Note:

Final rept. Oct 1986-Mar 1987

Corporate Author:

LAWRENCE LIVERMORE NATIONAL LAB CA

Personal Author(s):

Report Date:

1991-02-01

Pagination or Media Count:

48.0

Abstract:

Classical lamination theory for fiber composites is inherently limited to the two-dimensional conditions appropriate to thin shell configurations. A new derivation with appropriate tensor transformation is given which provides a fully three-dimensional lamination theory that is applicable to thick laminates involving out-of-plane stress teams. In connection with this work, a new failure criterion is derived for fiber composites, one which involves a minimum number of failure parameters and offers insight into the modes of failure. The key to both derivations is the restriction of five properties form of transversely isotropic media to a special form involving three independent properties. The reduced theoretical forms and the failure criterion are evaluated with respect to standard experimental data for fiber composites.

Subject Categories:

  • Laminates and Composite Materials

Distribution Statement:

APPROVED FOR PUBLIC RELEASE