The restraining effect of ductile ligaments on plane strain crack propagation and arrest in ferritic steels
✍ Scribed by E. Smith
- Publisher
- Elsevier Science
- Year
- 1984
- Tongue
- English
- Weight
- 371 KB
- Volume
- 19
- Category
- Article
- ISSN
- 0013-7944
No coin nor oath required. For personal study only.
✦ Synopsis
In the transition regime plain strain crack propagation in ferritic steels proceeds by a combination of cleavage and ductile rupture processes, the latter being confined to ligaments that are parallel to the direction of macroscopic crack propagation. These ligaments rupture as the crack propagates, and it is generally accepted that they have a restraining effect on crack propagation, and also provide a major contribution to the arrest fracture toughness KI,. In modelling the propagation and arrest phenomena, and in quantifying this restraining effect, it is tempting to average the effect of the discrete ligaments over a region behind the crack tip. The result8 of this paper'8 theoretical analysis justify the use of the averaging procedure.