Effects of biaxial loading on crack driving force and constraints in shallow semi-elliptical surface flaws
Effects of biaxial loading on crack driving force and constraints in shallow semi-elliptical surface flaws
Three-dimensional, elastic-plastic finite element analyses have been carried out to investigate the effects of biaxial loading on J-integrals and Q-values for shallow semi-elliptical surface flaws in wide plates. Direct tension and pure bending loading of up to about 10 times the yield strain were applied to models with linear elastic-power hardening and tripartite material behaviours. Crack depths were limited to 15 percent of the plate thickness. Differences were observed between the effects of biaxiality on J-strain behaviour for cracks in semi-infinite plates and those in finite width plates. The cracked semi-infinite geometry was considered more representative of structural applications. In this case, biaxial loading gave a large increase in J-integrals compared to uniaxial loading, but had negligible effect on constraint, as measured using the Q-value.
biaxial loading, uniaxial loading, cracked geometry, plasticity
37-54
Lee, M.M.K.
b0eec6ec-1557-494d-bbc5-4cd053cfbe46
Boothman, D.P.
175ce142-5138-437d-8ab9-d04de63284da
Luxmoore, A.R.
307e05c5-bacc-4f32-9ea7-4363f2e526e8
May 1999
Lee, M.M.K.
b0eec6ec-1557-494d-bbc5-4cd053cfbe46
Boothman, D.P.
175ce142-5138-437d-8ab9-d04de63284da
Luxmoore, A.R.
307e05c5-bacc-4f32-9ea7-4363f2e526e8
Lee, M.M.K., Boothman, D.P. and Luxmoore, A.R.
(1999)
Effects of biaxial loading on crack driving force and constraints in shallow semi-elliptical surface flaws.
International Journal of Fracture, 98 (1), .
(doi:10.1023/A:1018731604580).
Abstract
Three-dimensional, elastic-plastic finite element analyses have been carried out to investigate the effects of biaxial loading on J-integrals and Q-values for shallow semi-elliptical surface flaws in wide plates. Direct tension and pure bending loading of up to about 10 times the yield strain were applied to models with linear elastic-power hardening and tripartite material behaviours. Crack depths were limited to 15 percent of the plate thickness. Differences were observed between the effects of biaxiality on J-strain behaviour for cracks in semi-infinite plates and those in finite width plates. The cracked semi-infinite geometry was considered more representative of structural applications. In this case, biaxial loading gave a large increase in J-integrals compared to uniaxial loading, but had negligible effect on constraint, as measured using the Q-value.
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Published date: May 1999
Keywords:
biaxial loading, uniaxial loading, cracked geometry, plasticity
Identifiers
Local EPrints ID: 75380
URI: http://eprints.soton.ac.uk/id/eprint/75380
ISSN: 0376-9429
PURE UUID: 351c241b-1771-4465-85c6-b40f2635a4fa
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Date deposited: 11 Mar 2010
Last modified: 13 Mar 2024 22:51
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Author:
M.M.K. Lee
Author:
D.P. Boothman
Author:
A.R. Luxmoore
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