Accession Number : AD0741763

Title :   Evaluation of Dog Bone Fiber Composites for Use in Weapon Components.

Descriptive Note : Final rept.,

Corporate Author : MARVALAUD INC WESTMINSTER MD

Personal Author(s) : Pond,Robert B. , Jr. ; Pond,Robert B. , Sr

Report Date : FEB 1972

Pagination or Media Count : 59

Abstract : The potentials of a new concept involving staple fiber-reinforced composite materials with swollen-end fibers (dog bone) were examined for use in weapon hardware. This concept deals with the capacity of the composite system to sustain loads by viscous interaction of the matrix with geometric constraints of dog bone fibers. Systems with a tin matrix and 17-7 PH stainless steel dog bone fibers and systems with straight fibers for comparative purposes were studied. The mechanical test results showed an increase in UTS with increasing dog bone fiber volume yielding an 80 per cent increase with a 16 per cent fiber volume. The straight fibers exhibited only insignificant effects on the UTS values. The energy absorption to failure decreased with increasing fiber density for both the straight and the dog bone fibers due to contamination caused by the laminate processing technique. Ductilities were also limited in composites processed by the liquid infiltration techniques because of support wire cavities. However, calculations based on a theoretical model for flow stress, under the assumption that the interaction of the matrix and the fiber was viscous, compared favorably with the mechanical test data. (Author, modified-PL)

Descriptors :   (*WEAPON SYSTEMS, FIBER METALLURGY), (*COMPOSITE MATERIALS, MECHANICAL PROPERTIES), (*FIBER METALLURGY, COMPOSITE MATERIALS), STAINLESS STEEL, TIN, LAMINATES, MANUFACTURING, TENSILE PROPERTIES, DEFORMATION, TEST METHODS

Subject Categories : Laminates and Composite Materials
      Metallurgy and Metallography

Distribution Statement : APPROVED FOR PUBLIC RELEASE