Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7169302 | Engineering Fracture Mechanics | 2017 | 24 Pages |
Abstract
Running ductile fracture is one of the most catastrophic accidents of pipelines for natural gas transportation. Crack arrest toughness is important for preventing crack extension to a long distance along pipeline. Critical crack tip opening angle (CTOAC) is a promising parameter for characterizing crack arrest toughness. In this study, a new method is proposed to calculate the CTOAC from the energy-load curves in an instrumented drop weight tearing test (DWTT). Numerical analyses with the Gurson damage model have been conducted to verify the proposed method. It shows that results calculated from the energy-load curves are slightly lower than the results measured from specimen surface. Results calculated from the proposed method also agree well with experimental results reported in the literature.
Related Topics
Physical Sciences and Engineering
Engineering
Mechanical Engineering
Authors
Jian Shuai, Shengwen Tu, Junqiang Wang, Xiaobo Ren, Jianying He, Zhiliang Zhang,