Finite Element Simulations of Dynamic Fracture of Full-Scale Gas Transmission Pipelines

• 来源期刊: 固体力学学报（英文版）
• 年，卷（期）: 2018,（3）
• 页码范围: 357-368
• 页数: 12页
• 语种: 英文

摘要

The dynamic crack growth in a full-scale gas pipeline of API X80 steel is analyzed using the finite element method with the cohesive zone model.Based on the simulation,it is revealed that for the moderate steady-state crack growth,the crack-tip-opening angle strongly depends on the crack growth speed.In addition,the threshold initial crack sizes under different internal pressures are analyzed,which show a significant three-dimensional effect due to the wall thickness of the pipeline.The presented model offers a feasible way to study some details of the dynamic fracture of full-scale pipelines when tests are difficult or expensive.