An experimental—Numerical evaluation of the<Emphasis Type="Italic">T</Emphasis><Stack><Subscript>ε</Subscript><Superscript>*</Superscript></Stack> integral for a three-dimensional crack front期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

*An experimental—Numerical evaluation of theTε integral for a three-dimensional crack front**

Authors:	J. H. Jackson A. S. Kobayashi S. N. Atluri

Affiliation:	(1) University of Washington, 98195 Seattle, WA, USA;(2) Department of Mechanical Engineering, University of Washington, 98195-2600 Seattle, WA, USA;(3) University of California Irvine, 5252 California Avenue, Suite 140, 92612, CA, USA

Abstract:	TheT _ε ^* integral was calculated on the surface of single edge notched, three-point bend (SE(B)) specimens using experimentally obtained displacements. Comparison was made withT _ε ^* calculated with the measured surface displacements andT _ε ^* calculated at several points through the thickness of a finite element (FE) model of the SE(B) specimen. Good comparison was found between the surfaceT _ε ^* calculated from displacements extracted from the FE model and the surfaceT _ε ^* calculated from experimentally obtained displacements. The computedT _ε ^* integral was also observed to decrease as the crack front was traversed from the surface to the mid-plane of the specimen. Mid-planeT _ε ^* values tend to be approximately 10% of the surface values.

Keywords:	T _ε ^* integral three-dimensional fracture CTOA stable crack growth crack tunneling
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