NASA-CR-2057

Tensile failure criteria for fiber composite materials

Note:

This document has not been validated by ESDU. It is provided to our users as a useful reference source.

Abstract:

The analysis provides insight into the failure mechanics of these materials and defines criteria which serve as tools for preliminary design material selection and for material reliability assessment. The model incorporates both dispersed and propagation type failures and includes the influence of material heterogeneity. The important effects of localized matrix damage and post-failure matrix shear stress transfer are included in the treatment. The model is used to evaluate the influence of key parameters on the failure of several commonly used fiber-matrix systems. Analyses of three possible failure modes were developed. These modes are the fiber break propagation mode, the cumulative group fracture mode, and the weakest link mode. Application of the new model to composite material systems has indicated several results which require attention in the development of reliable structural composites. Prominent among these are the size effect and the influence of fiber strength variability.

Author(s):
B.W. Rosen; C.H. Zweben

Indexed under:

  • None

Details:

NASA-CR-2057
Format:
  • PDF (from scanned original)
Status:
  • Original, issued 01 Jan 1972
Previous Releases:
  • None available