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TECHNICAL PAPERS

Influence of Confining Pressure on the Crack Growth Behavior in a Highly Filled Elastomer

[+] Author and Article Information
C. T. Liu

Materials Technology Center, Southern Illinois University, Carbondale, IL 62901

G. Ravichandran

Graduate Aeronautical Laboratories, California Institute of Technology, Pasadena, CA 91125

J. Appl. Mech 73(5), 778-782 (Jan 20, 2006) (5 pages) doi:10.1115/1.2189874 History: Received January 18, 2005; Revised January 20, 2006

In this study, the effect of confining pressure on the crack growth behavior in a highly filled elastomer was investigated. The material under investigation contains 86% by weight of hard particles embedded in a rubbery matrix. The specimens were tested at a constant strain rate under a confining pressure. Two confining pressures, 3.45MPa and 6.9MPa, and two types of loading, monotonically increasing and cyclic, were considered. The experimental data were analyzed, and the effects of confining pressure on the damage process as well as the constitutive and crack growth behavior in the material are discussed.

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Copyright © 2006 by American Society of Mechanical Engineers
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Figures

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Figure 2

Applied load versus applied strain under different confining pressure

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Figure 3

Volume dilatation versus applied strain under different confining pressure

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Figure 4

Stress-strain curves under cyclic loading (loading, unloading, and reloading under 6.90MPa confining pressure)

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Figure 5

Stress-strain curves under cyclic loading (loading and unloading under 6.90MPa confining pressure, reloading under ambient pressure)

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Figure 6

Crack length versus time curve

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Figure 7

Crack growth rate versus mode I stress intensity factor (pressure=3.45MPa)

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Figure 8

Crack growth rate versus mode I stress intensity factor (pressure=6.90MPa)

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Figure 1

Specimen geometry

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