Abstract
This chapter discusses constraint-based approaches, which have been introduced to reduce the level of conservatism inherent in a single parameter K- or J-based approach to fracture. The constraint-based approach incorporates additional information about the crack tip deformation to quantify the deviation from a high constraint stress field with the amplitude given by J. The theory behind constraint-based fracture is discussed and the different parameters used in the theory are outlined briefly. The incorporation of the constraint-based approach within the commonly used failure assessment diagram (FAD) approach is also described.
Original language | English |
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Title of host publication | Fracture and Fatigue of Welded Joints and Structures |
Publisher | Elsevier Ltd |
Pages | 17-30 |
Number of pages | 14 |
ISBN (Electronic) | 9781845695132 |
ISBN (Print) | 9781845695132 |
DOIs | |
Publication status | Published - Apr 2011 |
Keywords
- Constraint
- Failure assessment diagram
- Finite element analysis
- Fracture mechanics
- Fracture parameters
- Non-linear fracture mechanics
- Numerical models
- Q-stress
- T-stress