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Effect of residual stresses on the crack-tip constraint in a modified boundary layer model
- Source :
-
International Journal of Solids & Structures . Jun2009, Vol. 46 Issue 13, p2629-2641. 13p. - Publication Year :
- 2009
-
Abstract
- Abstract: Residual stresses play a crucial role in structural integrity assessment. In this study, a large cracked cylinder with a weld in the center is applied to investigate the effect of residual stresses on the crack-tip constraint. A modified boundary layer model with a remote displacement-controlled elastic K-field and T-stress under small scale yielding has been used to simulate the problem. A two-dimensional tensile residual stress field due to the weld is introduced into the model by the so-called eigenstrain method. It has been shown that the residual stresses can significantly elevate the crack-tip constraint and thus increase the probability for cleavage fracture. The constraint parameter R introduced by the authors can be used to rank the crack-tip constraint induced by the bi-axial residual stresses. The R value decreases with the increase in the applied J-integral. The residual stress-induced constraint is also coupled with the T-stress. The R value becomes smaller with larger T-stress. [Copyright &y& Elsevier]
Details
- Language :
- English
- ISSN :
- 00207683
- Volume :
- 46
- Issue :
- 13
- Database :
- Academic Search Index
- Journal :
- International Journal of Solids & Structures
- Publication Type :
- Academic Journal
- Accession number :
- 39353624
- Full Text :
- https://doi.org/10.1016/j.ijsolstr.2009.02.009