STRESS INTENSITY FACTORS FOR CORNER CRACKS AT A HOLE BY A 3-D WEIGHT FUNCTION METHOD WITH STRESSES FROM THE FINITE ELEMENT METHOD |
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| Authors: | W Zhao J C Newman Jr M A Sutton X R Wu K N Shivakumar |
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| Affiliation: | University of South Carolina, Columbia, SC 29208, USA;NASA Langley Research Center, Hampton, VA 23681, USA;Institute of Aeronautical Materials, Beijing 100095, P.R. China;North Carolina A&T State University, Greensboro, NC 27410, USA |
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| Abstract: | Abstract— Stress intensity factors for quarter-elliptical corner cracks emanating from a circular hole are determined using a 3-D weight function method combined with a 3-D finite element method. The 3-D finite element method is used to analyze uncracked configurations and provide stress distributions in the region where a crack is likely to occur. Using this stress distribution as input, the 3-D weight function method is used to determine stress intensity factors. Three different loading conditions, i.e. remote tension, remote bending and wedge loading, are considered for a wide range of geometrical parameters. The significance of using 3-D uncracked stress distributions is studied. Comparisons are made with solutions available in the literature. |
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| Keywords: | Stress intensity factors Corner cracks Weight function method Stress concentrations |
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