Mode I fatigue cracking in a fiber reinforced metal matrix composite

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Abstract

The mode I fatigue crack growth behavior of a fiber reinforced metal matrix composite with weak interfaces is examined. In the longitudinal orientation, matrix cracks initially grow with minimal fiber failure. The tractions exerted by the intact fibers shield the crack tip from the applied stress and reduce the rate of crack growth relative to that in the unreinforced matrix alloy. In some instances, further growth is accompanied by fiber failure and a concomitant loss in crack tip shielding. The measurements are compared with model predictions, incorporating the intrinsic fatigue properties of the matrix and the shielding contributions derived from the intact fibers. The magnitude of the interface sliding stress inferred from the comparisons between experiment and theory is found to be in broad agreement with values measured using alternate techniques. The results also indicate that the interface sliding stress degrades with cyclic sliding, an effect yet to be incorporated in the model. In contrast, the transverse fatigue properties are found to be inferior to those of the monolithic matrix alloy, a consequence of the poor fatigue resistance of the fiber/matrix interface.

References (22)

  • R.M. McMeeking et al.

    Mech. Mater.

    (1990)
  • D.B. Marshall et al.

    Acta metall.

    (1985)
  • B. Budiansky et al.

    J. Mech. Phys. Solids

    (1986)
  • D.B. Marshall et al.

    Acta metall.

    (1987)
  • M.D. Thouless

    Acta metall.

    (1989)
  • D.P. Walls et al.

    Scripta metall. mater.

    (1991)
  • P.D. Warren et al.

    Acta metall. mater.

    (1992)
  • T.J. Mackin et al.

    Acta metall. mater.

    (1992)
  • B.N. Cox et al.

    Fatigue Fract. Engng Mater. Struct.

    (1991)
  • M.D. Sensmeier et al.
  • P.K. Wright et al.
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    Present address: United Technologies, Pratt and Whitney, West Palm Beach, FL 33410-9600, U.S.A.

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