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Damage Initiation and Growth in Fiber-Reinforced MMCs

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Abstract

Damage in continuous-fiber reinforced metal-matrix composites can be quite complex because of the number of constituents (e.g., fiber, matrix or fiber/matrix interface) that can fail. Multidirectional lay-ups have an even greater number of possible damage orientations. Based on the simplifying assumption of equivalent constituent strain states in the absence of damage, a strain-based failure criterion may be applied to determine when and where initial damage will occur. Depending on the relative fatigue behavior of the fiber and matrix, as well as the interface properties, the failure modes can be grouped into four categories.

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Authors
  1. C. R. Saff
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  2. D. M. Harmon
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  3. W. S. Johnson
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Additional information

C.R. Saff received his master’s degree in engineering mechanics from the University of Missouri-Rolla in 1976. He is currently section chief in the Structural Research Division at McDonnell Aircraft Company.

D.M. Harmon received his master’s degree in structures and dynamics from George Washington University in 1985. He is currently an engineer in the Structural Research Division at McDonnell Aircraft Company.

W.S. Johnson received his Ph.D. in solid and structural mechanics from Duke University in 1979. He is currently senior research engineer at NASA Langley Research Center.

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Saff, C.R., Harmon, D.M. & Johnson, W.S. Damage Initiation and Growth in Fiber-Reinforced MMCs. JOM 40, 58–63 (1988). https://doi.org/10.1007/BF03258813

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