Failure Pressure Analysis of Corroded Moderate-to-High Strength Pipelines  

作　　者：苏晨亮 李昕 周晶 

机构地区：[1]State Key Laboratory of Coastal and Offshore Engineering,Dalian University of Technology

出　　处：《China Ocean Engineering》2016年第1期69-82,共14页中国海洋工程（英文版）

基　　金：financially supported by Ministry of Science and Technology of China(Grant No.2011CB013702);the Program for New Century Excellent Talents in University(Grant No.NCET-11-0051)

摘　　要：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.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.

关 键 词：steel pipeline stress-based criteria failure pressure effect of corrosion width 

分 类 号：P755.3[天文地球—海洋科学]