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Constraint of Semi-elliptical Surface Cracks in T and L-joints
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 Title & Authors
Constraint of Semi-elliptical Surface Cracks in T and L-joints
Lee, Hyeong-Il;
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 Abstract
Critical defects in pressure vessels and pipes are generally found in the form of a semi-elliptical surface crack, and the analysis of which is consequently an important problem in engineering fracture mechanics. Furthermore, in addition to the traditional single parameter K or J-integral, the second parameter like T-stress should be measured to quantify the constraint effect. In this work, the validity of the line-spring finite element is investigated by comparing line-spring J-T solutions to the reference 3D finite element J-T solutions. A full 3D-mesh generating program for semi-elliptical surface cracks is employed to provide such reference 3D solutions. Then some structural characteristics of the surface-cracked T and L-joints are studied by mixed mode line-spring finite element. Negative T-stresses observed in T and L-joints indicate the necessity of J-T two parameter approach for analyses of surface-cracked T and L-joints.
 Keywords
Semi-elliptical Surface Crack;Finite Element Analysis;Line-spring Finite Element;J-integral;T-stress;T-joint;L-joint;
 Language
Korean
 Cited by
 References
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