Failure Pressure Analysis of Corroded Moderate-to-High Strength Pipelines |
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| Authors: | SU Chen-liang LI Xin and ZHOU Jing |
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| Institution: | State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology,
Dalian 116023, China;State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology,
Dalian 116023, China;State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology,
Dalian 116023, China |
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| Abstract: | Based on the elastic-plastic, large-deformation finite element method, burst capacity of steel pipeline with longitudinal corrosion defect subjected to internal pressure is studied. The appropriate stress-based criterion is used to predict the failure pressure of finite element model of corroded pipeline under internal pressure. By considering the pipe steel grades and geometries of corrosion defects, a series of finite element analyses is conducted. The effects of corrosion depth, length and width on burst capacity are also discussed. A specific failure pressure solution for the assessment of corrosion defects in moderate-to-high strength pipeline is proposed on the base of numerical results. The failure pressures predicted by the proposed method are in better agreement with the experimental results than the results by the other methods. |
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| Keywords: | steel pipeline stress-based criteria failure pressure effect of corrosion width |
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