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International Journal of Damage Mechanics
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Effect of Strain Rate on the Near Crack Tip Behavior of a Particulate Composite

S. C. Max Yen

Department of Civil Engineering, Southern Illinois Universitv at Carbondale, Carbondale, IL 62901, myen{at}siu.edu

C. T. Liu

Air Force Phillips Laboratory, PL/RKS, 10 E. Saturn, Edwards AFB, CA 93524-5790

This paper presents experimental results regarding the crack propagation and strain field near the crack tip of a particulate composite material under high strain rates. The particulate composite material presently being studied is viscoelastic in nature, therefore, the characteristics of stress relaxation and redistribution near the vicinity of the crack tip are thought to be different under different loading rates. In addition, the strain field ahead of the crack tip is related to the evolution of the damage zone and the crack propagation rate. In particular, the size and shape of a damage zone can dominate the crack propagation process.

Key Words: High strain rate • particulate composite material • near crack tip behavior • strain field • strain gradient • damage • crack propagation

International Journal of Damage Mechanics, Vol. 9, No. 4, 352-377 (2000)
DOI: 10.1106/TPQ4-FM1Q-DYXL-V0U6
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