FE simulation on fatigue failure due to cracks initiated at corrosion zone

• Main Author: Chong, Kah Leong
• Other Authors: Xiao Zhongmin
• Format: Final Year Project
• Language: English
• Published: Nanyang Technological University 2024
• Subjects: Engineering; FE simulation on cracks; Pipeline cracks
• Online Access: https://hdl.handle.net/10356/181656
• Institution: Nanyang Technological University

Deep-sea pipelines are subject to large plastic strains due to reeling installation methods.. While these pipelines can withstand small cracks generated during installation, cyclic loading in the deep-sea environment causes cracks to grow and merge, leading to fatigue failure. The corrosion zone in deep-sea pipelines is particularly susceptible to crack initiation and propagation. This study investigates the fatigue behaviour of 3D interacting cracks in the corrosion zone of deep-sea pipelines. The finite element method (FEM) is used to model the fatigue behaviour of these interacting cracks under cyclic loading. The parameters affecting the fatigue behaviour of deep-sea pipelines in the corrosion zone have been thoroughly studied.