Simulation of crack propagating in discontinuously reinforced metal matrix composite

Hiroyuki Toda, Toshiro Kobayashi

研究成果: ジャーナルへの寄稿学術誌査読

25 被引用数 (Scopus)


A fracture mechanics-based numerical simulation of a crack propagating under mode I loading through discontinuously reinforced metal matrix composites (MMCs) is presented. Microcrack initiation due to debonding and breakage of reinforcements, shielding and antishielding effects caused by both microcracks and the reinforcements, the effect of crack deflection, and growing crack singularity are considered in the calculation of local crack tip driving forces. Statistical variations of spatial distribution and strength of the reinforcements are also considered. The essential feature of the model is to predict crack initiation toughness and crack path morphologies using a mixed-mode crack propagation criterion. Application of the program to predict crack growth behavior in an SiC whisker/Al alloy composite is presented. Microcracking far ahead of the tip of a main crack, crack deflection toward the microcracks, and subsequent incorporation of the microcracks which most affect the main crack are well simulated. The predicted microcrack distribution and variation of mixed-mode crack tip driving forces with crack growth are also evaluated.

ジャーナルMetallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
出版ステータス出版済み - 1997

!!!All Science Journal Classification (ASJC) codes

  • 凝縮系物理学
  • 材料力学
  • 金属および合金


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