Effect of residual stresses on crack behaviour in single edge bending specimens
Article first published online: 22 JUN 2012
© 2012 Wiley Publishing Ltd.
Fatigue & Fracture of Engineering Materials & Structures
Volume 36, Issue 2, pages 115–126, February 2013
How to Cite
FARAHANI, M., SATTARI-FAR, I., AKBARI, D. and ALDERLIESTEN, R. (2013), Effect of residual stresses on crack behaviour in single edge bending specimens. Fatigue & Fracture of Engineering Materials & Structures, 36: 115–126. doi: 10.1111/j.1460-2695.2012.01704.x
- Issue published online: 9 JAN 2013
- Article first published online: 22 JUN 2012
- Received in final form 05 May 2012
- crack-tip constraint;
- modified J-integral;
- residual stresses;
- single edge bending specimen
Residual stresses due to manufacturing processes, such as welding, change the load bearing capacity of cracked components. The effects of residual stresses on crack behaviour in single edge bending specimens were investigated using Finite element analyses. Three parameters (J, Q and R) were used to study the crack behaviour. The J-integral predicts the size scale over which large stresses and strains exist, the constraint parameter Q describes the crack-tip constraint as a result of geometry, loading mode and crack depth and the constraint parameter R is used to describe the constraint resulting from residual stresses. To carry out a systematic investigation on the effect of residual stresses on the J-integral and crack-tip constraints, models under different combinations of residual stresses and external loads with different crack depths were analysed. It has been shown that the crack-tip constraint R increased by tensile residual stresses around the crack-tip. On the other hand, the constraint parameter R decreased and tended to zero at high external load levels.