STP808: Deformation Behavior of Depleted Uranium/Tungsten Fiber Composites in Compression

    Pattnaik, A
    Materials Engineers and Supervisory Materials Engineer, Composite Materials Branch, Naval Research Laboratory, Washington, D.C.

    Kim, C
    Materials Engineers and Supervisory Materials Engineer, Composite Materials Branch, Naval Research Laboratory, Washington, D.C.

    Weimer, RJ
    Materials Engineers and Supervisory Materials Engineer, Composite Materials Branch, Naval Research Laboratory, Washington, D.C.

    Pages: 22    Published: Jan 1983


    Abstract

    Longitudinal and transverse compression testing of depleted uranium (U-0.75 Ti)/tungsten fiber (either pure tungsten or W-3Re) unidirectional composites has been carried out by using cylindrical specimens with various length-to-diameter (l/d) ratios. Inelastic column buckling was eliminated by using a proper l/d ratio for the specimen. The test fixture included constraining rings at the ends of the specimen to prevent brooming failure, and compressive loads were applied directly to the end faces of the specimen. The compressive yield strength of the longitudinal specimen increased linearly with volume fraction of fibers obeying a rule-of-mixture equation, and the composite did not fail catastrophically. However, the strength of the transverse specimens decreased with increasing fiber volume fraction and the specimen failed catastrophically on a plane 30 deg to the compression axis. Both longitudinal and transverse compressive strengths were significantly increased by heat treatment of the composite.

    Keywords:

    metal matrix composite, depleted uranium, tungsten fiber, unidirectional composites, heat treatment, compression testing, longitudinal and transverse compression, deformation, failure


    Paper ID: STP36208S

    Committee/Subcommittee: E28.02

    DOI: 10.1520/STP36208S


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