Symmetric and anti-symmetric buckle propagation modes in subsea corroded pipelines |
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| Institution: | 1. Department of Mechanics and Civil Engineering, Jinan University, Guangzhou, Guangdong 510632, China;2. Department of Mechanical Engineering, The University of Akron, Akron, OH 44325, USA;1. School of New Energy and Materials, Southwest Petroleum University, Chengdu-610500, Sichuan, China;2. School of Civil Engineering and Architecture, Southwest Petroleum University, Chengdu-610500, Sichuan, China;3. Department of Zoology, School of Bioengineering and Biosciences, Lovely Professional University, Phagwara, Punjab 144402, India;4. Institute of Photovoltaics, Southwest Petroleum University, No. 8 Xindu Road, Chengdu 610500, China;1. Department of Civil Engineering, Tianjin University, Tianjin 300072, China;2. Key Laboratory of Coast Civil Structure and Safety, Ministry of Education (Tianjin University), Tianjin 300072, China;1. Department of Civil Engineering, Tianjin University, Tianjin 300072, China;2. Key Laboratory of Coast Civil Structure and Safety, Ministry of Education (Tianjin University), Tianjin 300072, China;3. Department of Civil and Environmental Engineering, Imperial College London, London SW7 2AZ, United Kingdom |
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| Abstract: | Solutions for the steady-state buckle propagation modes and pressures in a corroded pipeline subjected to external hydrostatic pressure are presented. The buckle propagation pressure of a corroded pipeline is obtained analytically with a rigid-plastic analysis and numerically from finite element analysis (ABAQUS). Both the rigid-plastic analysis and ABAQUS program reveal symmetric and anti-symmetric buckling modes, depending on the depth and angular extent of the corrosion. Snap-through and global buckling of the pipeline are also distinguished in both solutions. The rigid-plastic solutions for buckle propagation pressure and corresponding collapse modes are found to be within 15% with numerical solutions. |
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