Abstract
The effects of a superposed hydrostatic stress on the deformation and failure behavior of whisker reinforced metal-matrix composites are analyzed numerically. The applied loading path consists of the imposition of a hydrostatic stress followed by tension along the fiber axis. Matrix cavitation is the sole failure mechanism analyzed and an elastic-viscoplastic material model is used that accounts for ductile fracture by the nucleation and subsequent growth of voids to coalescence. The effect of the distribution of the whiskers on failure is illustrated. A superposed hydrostatic stress is found to have a much greater effect on ductility when the whiskers are clustered than when they are uniformly distributed in the matrix. The predicted variations in ductility for tensile and compressive superposed hydrostatic stress, and the presence of zones which show highly localized strains, axe in qualitative agreement with available experimental results.
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© 1991 Springer-Verlag New York Inc.
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Christman, T., Llorca, J., Suresh, S., Needleman, A. (1991). The Effect of Superposed Hydrostatic Stress on the Mechanical Response of Metal-Matrix Composites. In: Dvorak, G.J. (eds) Inelastic Deformation of Composite Materials. International Union of Theoretical and Applied Mechanics. Springer, New York, NY. https://doi.org/10.1007/978-1-4613-9109-8_15
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DOI: https://doi.org/10.1007/978-1-4613-9109-8_15
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