Affiliation:
1. College of Pipeline and Civil Engineering China University of Petroleum (East China) Qingdao China
2. Province Key Laboratory of Safety of Oil & Gas Storage and Transportation China University of Petroleum (East China) Qingdao China
Abstract
AbstractCrack tip opening angle (CTOA) has been used to describe the arrest toughness of high‐grade pipelines. However, its evolutions and influencing factors during pipeline crack propagation are unclear. In view of this, this paper reproduces the full‐scale test using a numerical simulation method that is proven to be reliable. On this basis, the evolutions of CTOA during the dynamic crack propagation of the pipeline are systematically studied, and the effects on CTOA values are clarified. The results show that the critical CTOA of a pipeline is independent of the design factor, the pressure decompression, and the large change in the crack velocity and is also not sensitive to the pipe strength, pipe wall thickness, and the inertial effect of soil, but only related to the pipe diameter and pipe toughness. The above conclusions have laid a foundation for the subsequent establishment of the arrest control method for natural pipelines based on CTOA.
Funder
National Natural Science Foundation of China
Natural Science Foundation of Shandong Province
Postdoctoral Innovation Project of Shandong Province
Subject
Mechanical Engineering,Mechanics of Materials,General Materials Science
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