Tensor Transformations and Failure Criteria for the Analysis of Fiber Composite Materials
Final rept. Oct 1986-Mar 1987
LAWRENCE LIVERMORE NATIONAL LAB CA
Pagination or Media Count:
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.
- Laminates and Composite Materials