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

J. H. Jackson1, A. S. Kobayashi2, S. N. Atluri3
5353 Memorial Drive 1037, Houston, TX, 77007
University of Washington, Department of Mechanical Engineerng, Seattle, WA 98195-2600
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 Tε*  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 Tε*  integral, via the Equivalent Domain Integral (EDI) method with incremental plasticity. Validity of the analysis was ensured by the agreement of the Tε*  integral obtained on the surface (plane stress) and the plane stress values from previous studies. Tε*   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.

Keywords

Tε*  integral, 3-D fracture, CTOA, stable crack growth, crack tunneling.

Cite This Article

Jackson, J. H., Kobayashi, A. S., Atluri, S. N. (2004). A Three Dimensional Numerical Investigation of the T* integral along a Curved Crack Front. CMES-Computer Modeling in Engineering & Sciences, 6(1), 17–30.



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