STP864: Impact Resistance of Fiber Composites: Energy-Absorbing Mechanisms and Environmental Effects

    Chamis, CC
    National Aeronautics and Space Administration, Lewis Research Center, Cleveland, OH

    Sinclair, JH
    National Aeronautics and Space Administration, Lewis Research Center, Cleveland, OH

    Pages: 20    Published: Jan 1985


    Abstract

    Energy-absorbing mechanisms are identified and evaluated using several approaches. The energy-absorbing mechanisms considered are those in unidirectional composite beams subjected to impact. The approaches used include mechanistic models, statistical models, transient finite-element analysis, and simple beam theory. Predicted results are correlated with experimental data from Charpy impact tests. The environmental effects on impact resistance are also evaluated. Working definitions for energy-absorbing and energy-releasing mechanisms are proposed and a dynamic fracture progression is outlined. Possible generalizations to angleplied laminates are described.

    Keywords:

    composite mechanics, predictive models, mechanistic, statistical, finite element, transient analysis, dominant mechanisms, energy absorption, energy release, correlation, fracture initiation, fracture progression, generalization, definitions


    Paper ID: STP32798S

    Committee/Subcommittee: D30.02

    DOI: 10.1520/STP32798S


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