Characterizing dynamic fracture toughness of linepipe steels using the pressed-notch drop-weight-tear test specimen
✍ Scribed by David L. Rudland; Yong-Yi Wang; Gery Wilkowski; David J. Horsley
- Publisher
- Elsevier Science
- Year
- 2004
- Tongue
- English
- Weight
- 425 KB
- Volume
- 71
- Category
- Article
- ISSN
- 0013-7944
No coin nor oath required. For personal study only.
✦ Synopsis
This paper presents the development of a procedure for calculating the dynamic J -R curve from the load-displacement trace of a pressed-notch drop-weight-tear test specimen. The slope of the J M -R curves generated provides technical insight into the range of steady-state propagation that occurs during these experiments. The slope of the J M -R curve (dJ M =da) is compared to visually measured crack-tip-opening angle values and conclusions about the relationship between these parameters and the steady-state crack propagation resistance are made. These results are key in the development of a procedure to predict axial crack arrest in gas pipelines from laboratory specimen data.