Accession Number : AD0759827

Title :   Strength of Molded Discontinuous Fiber Composites.

Descriptive Note : Technical rept. Jul 71-Apr 72,

Corporate Author : AIR FORCE MATERIALS LAB WRIGHT-PATTERSON AFB OHIO

Personal Author(s) : Jerina,K. L. ; Halpin,J. C.

Report Date : OCT 1972

Pagination or Media Count : 46

Abstract : The strength of randomly oriented short fiber composites will be modeled by a quasi- isotropic laminate. Lamination theory and a failure criterion will be used to approximate the stress strain response of a FRP/epoxy composite as it is loaded to failure. Experimental data are presented in light of the failure tensor and maximum strain failure criteria. An invariant method of determining the interaction term of the failure tensor is investigated and evaluated with respect to experimental data. The laminate analogy for strength is also applied to a flow molded or extruded short fiber composite with a known fiber orientation distribution. (Author-PL)

Descriptors :   (*COMPOSITE MATERIALS, STRUCTURAL PROPERTIES), GLASS TEXTILES, LAMINATES, SYNTHETIC FIBERS, BRITTLENESS, STRESSES, LOADS(FORCES), FAILURE(MECHANICS), NUMERICAL ANALYSIS

Subject Categories : Laminates and Composite Materials
      Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE