Open Access

ARTICLE

Crack Linkup by Stable Crack Growth

by L. Ma¹, A.S. Kobayashi², S. N. Atluri³, P.W. Tan⁴

1 University of Washington, Department of Mechanical Engineering, Seattle, WA 98195-2600. Currently at United Technologies Research Center, Structural Integrity Group, East Hartford, CT 06108
2 University of Washington, Department of Mechanical Engineering, Seattle, WA 98195-2600
3 University of California, Los Angeles, Center for Aerospace Research and Education, Los Angeles, CA, 90095-1597
4 FAA William J. Hughes Technical Center, Atlantic City International Airport, NJ 08405

Computer Modeling in Engineering & Sciences 2000, 1(4), 19-26. https://doi.org/10.3970/cmes.2000.001.471

Abstract

Experimentally determined T_ε^* and CTOA resistance curves were used to simulate numerically, stable crack growth and the ensuing crack linkup in 0.8 mm thick 2024-T3 aluminum tension specimen with multiple site damage (MSD) subjected to monotonically/cyclically increasing loading. The T_ε^* integral correctly predicted the crack growth and linkup history as well as the onset of rapid fracture in MSD specimens. The CTOA criterion also predicted the crack growth history but in its present form, could not predict crack linkup and rapid fracture.

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Keywords

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