Local buckling failure analysis of high-strength pipelines
投稿时间:2016-12-12  
英文关键词:Local buckling, High-strength pipeline, Finite element analysis, Critical bending moment, Critical compressive stress, Critical compressive strain
基金项目:The work is supported by the National Science-Technology Support Plan Projects of China, under Award No.2015BAK16B02.
作者单位
Yan Li Faculty of Mechanical and Transportation Engineering, China University of Petroleum, Beijing 102249, China 
Jian Shuai Faculty of Mechanical and Transportation Engineering, China University of Petroleum, Beijing 102249, China 
Zhong-Li Jin China ENFI Engineering Corporation, Beijing 100038, China 
Ya-Tong Zhao Faculty of Mechanical and Transportation Engineering, China University of Petroleum, Beijing 102249, China 
Kui Xu Faculty of Mechanical and Transportation Engineering, China University of Petroleum, Beijing 102249, China 
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英文摘要:
      Pipelines in geological disaster regions typically suffer the risk of local buckling failure because of slender structure and complex load. This paper is meant to reveal the local buckling behavior of buried pipelines with a large diameter and high strength, which are under different conditions, including pure bending and bending combined with internal pressure. Finite element analysis was built according to previous data to study local buckling behavior of pressurized and unpressurized pipes under bending conditions and their differences in local buckling failure modes. In parametric analysis, a series of parameters, including pipe geometrical dimension, pipe material properties and internal pressure, were selected to study their influences on the critical bending moment, critical compressive stress and critical compressive strain of pipes. Especially the hardening exponent of pipe material was introduced to the parameter analysis by using the Ramberg– Osgood constitutive model. Results showed that geometrical dimensions, material and internal pressure can exert similar effects on the critical bending moment and critical compressive stress, which have different, even reverse effects on the critical compressive strain. Based on these analyses, more accurate design models of critical bending moment and critical compressive stress have been proposed for high-strength pipelines under bending conditions, which provide theoretical methods for highstrength pipeline engineering.
Yan Li,Jian Shuai,Zhong-Li Jin,Ya-Tong Zhao,Kui Xu,2017.Local buckling failure analysis of high-strength pipelines.Petroleum Science,(3):549~559.
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