Open Access

ARTICLE

A Three Dimensional Numerical Investigation of the T* integral along a Curved Crack Front

by J. H. Jackson¹, A. S. Kobayashi², S. N. Atluri³

1 5353 Memorial Drive 1037, Houston, TX, 77007
2 University of Washington, Department of Mechanical Engineerng, Seattle, WA 98195-2600
3 University of California, Irvine, Aerospace Engineering, 5252 California Ave. Ste 140, Irvine, CA 92612

Computer Modeling in Engineering & Sciences 2004, 6(1), 17-30. https://doi.org/10.3970/cmes.2004.006.017

Abstract

The T_ε^*  integral was calculated numerically along an extending, tunneling crack front in an 8 mm thick, aluminum three-point bend (3PB) specimen, using a numerical model driven by experimentally obtained surface displacements. The model provided input to a contour integration for the T_ε^*  integral, via the Equivalent Domain Integral (EDI) method with incremental plasticity. Validity of the analysis was ensured by the agreement of the T_ε^*  integral obtained on the surface (plane stress) and the plane stress values from previous studies. T_ε^*   was observed to decrease from the outer surface of the specimen to the more constrained mid-plane. This difference became more pronounced as the crack grew.

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Keywords

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