STP546: Crack-Tip Deformation Measurements Accompanying Fracture in Fibrous and Laminar Composites

    Underwood, JH
    Benét Weapons Laboratory, Watervliet, N.Y.

    Pages: 19    Published: Jan 1974


    Abstract

    Experimental measurements are described of various types and stages of crack-tip deformation which accompanies crack growth in boron-aluminum sheet and in laminar steel plate. Optical interference and oblique-light photography are used to show the interaction of a crack with individual fibers and layers in the two systems for various tensile loads and specimen configurations. A fracture mechanics analysis is used to categorize the fracture behavior of boron-aluminum specimens of different fiber orientation. The crack-tip deformation in laminar steel plate under fatigue load is related to the interlayer bond strength and to the subsequent fracture behavior of the plate.

    Keywords:

    composite materials, fracture tests, cyclic loads, crack propagation, deformation


    Paper ID: STP35500S

    Committee/Subcommittee: D30.04

    DOI: 10.1520/STP35500S


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