Abstract
Tensile residual stresses, such as those generated by welding, act as crack opening stresses and can have a negative effect on the fatigue and fracture performance of a component. In this work the effect of representative residual stress distributions on the fracture behaviour of a ferritic steel has been examined using finite element analysis. A Gurson-type void growth model is used to model the effect of ductile tearing ahead of a crack. For the cases examined it is seen that a tensile residual stress field may lead to a reduction in the toughness of the material (as represented by the J-resistance curve). The observed difference in toughness can be linked to the different constraint levels in the specimens due to the introduction of the residual stress field and can be rationalised through the use of a two parameter, J - Q approach.
| Original language | English |
|---|---|
| Pages (from-to) | 175-180 |
| Number of pages | 6 |
| Journal | American Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP |
| Volume | 434 |
| DOIs | |
| Publication status | Published - 2002 |
| Externally published | Yes |
| Event | Computational Weld Mechanics, Constraint and Weld Fracture (2002 ASME Prssure Vessels and Piping Conference) - Vancouver, BC, Canada Duration: 5 Aug 2002 → 9 Aug 2002 |