Relationship Between Differential Stress Intensity Factor and Crack Growth Rate in Cyclic Tension in Westerly Granite

K Kim; A Mubeen

doi:10.1520/STP28304S

SYMPOSIA PAPER Published: 01 January 1981

STP28304S

Relationship Between Differential Stress Intensity Factor and Crack Growth Rate in Cyclic Tension in Westerly Granite

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The laws of fatigue crack propagation in rock may be used to predict life of underground structures for energy storage. The experiments on Westerly granite suggest that this material follows the law da/dN = C(ΔK)^m for fatigue crack growth rate and values of C and m are determined. It is observed that m is constant for various ratios of σ_min/σ_max whereas C is a parametric constant depending upon the stress ratio. The fatigue cracking in Westerly granite is predominantly along the grain boundaries and the crack is often stopped for a long period at such boundaries that are unfavorably disposed.

Author Information

Kim, K

Michigan Technological University, Houghton, Mich.

Mubeen, A

Michigan Technological University, Houghton, Mich.

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Details

Developed by Committee: E08

Pages: 157–168

DOI: 10.1520/STP28304S

ISBN-EB: 978-0-8031-4811-6

ISBN-13: 978-0-8031-0731-1

Relationship Between Differential Stress Intensity Factor and Crack Growth Rate in Cyclic Tension in Westerly Granite

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