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J-estimation for semi-elliptical surface cracks in wide plates under direct tension

J-estimation for semi-elliptical surface cracks in wide plates under direct tension
J-estimation for semi-elliptical surface cracks in wide plates under direct tension
Large marine structures can be subjected to extensive localized damage, with strains reaching 10 times the yield strain. Small defects might propagate, and accurate defect assessment is required for safe operation. To simulate this problem, J-integrals have been computed for semielliptical cracks in wide steel plates under tension. Three-dimensional (3D) elastic–plastic finite element analysis was used to model shallow crack geometries with 0.2???a/c???0.57 and 0.05???a/t???0.15. The material responses were linear elastic followed either by power hardening, or perfect plasticity and power hardening. It was found that, in contrast to previous studies on single edge notch geometries, the material law does not have a major influence on the J–strain behaviour. Results obtained from the 3D analyses form the basis for the development of a J-based estimation scheme.


elastic–plastic behaviour, finite element analysis, j-integral estimations, semielliptical cracks, wide plate
8756-758X
333-346
Boothman, D.P.
175ce142-5138-437d-8ab9-d04de63284da
Lee, M.M.K.
b0eec6ec-1557-494d-bbc5-4cd053cfbe46
Luxmoore, A.R.
307e05c5-bacc-4f32-9ea7-4363f2e526e8
Sumpter, J.G.D.
0649ee1a-191d-4a52-a379-23d86f9d205f
Boothman, D.P.
175ce142-5138-437d-8ab9-d04de63284da
Lee, M.M.K.
b0eec6ec-1557-494d-bbc5-4cd053cfbe46
Luxmoore, A.R.
307e05c5-bacc-4f32-9ea7-4363f2e526e8
Sumpter, J.G.D.
0649ee1a-191d-4a52-a379-23d86f9d205f

Boothman, D.P., Lee, M.M.K., Luxmoore, A.R. and Sumpter, J.G.D. (1998) J-estimation for semi-elliptical surface cracks in wide plates under direct tension. Fatigue and Fracture of Engineering Materials and Structures, 21 (3), 333-346. (doi:10.1046/j.1460-2695.1998.00478.x).

Record type: Article

Abstract

Large marine structures can be subjected to extensive localized damage, with strains reaching 10 times the yield strain. Small defects might propagate, and accurate defect assessment is required for safe operation. To simulate this problem, J-integrals have been computed for semielliptical cracks in wide steel plates under tension. Three-dimensional (3D) elastic–plastic finite element analysis was used to model shallow crack geometries with 0.2???a/c???0.57 and 0.05???a/t???0.15. The material responses were linear elastic followed either by power hardening, or perfect plasticity and power hardening. It was found that, in contrast to previous studies on single edge notch geometries, the material law does not have a major influence on the J–strain behaviour. Results obtained from the 3D analyses form the basis for the development of a J-based estimation scheme.


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More information

Published date: March 1998
Keywords: elastic–plastic behaviour, finite element analysis, j-integral estimations, semielliptical cracks, wide plate

Identifiers

Local EPrints ID: 75374
URI: https://eprints.soton.ac.uk/id/eprint/75374
ISSN: 8756-758X
PURE UUID: 14a1c3bf-79ba-4db2-85dc-1c008d08bf3f

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Date deposited: 11 Mar 2010
Last modified: 18 Jul 2017 23:43

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Contributors

Author: D.P. Boothman
Author: M.M.K. Lee
Author: A.R. Luxmoore
Author: J.G.D. Sumpter

University divisions

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