Buckle Propagation in Steel Pipes of Ultra-high Strength: Experiments, Theories and Numerical Simulations

An Investigation on the Effect of Widespread Internal Corrosion Defects on the Collapse Pressure of Subsea Pipelines

“…Before performing the parametric studies of the collapse pressure of pipe with randomly distributed internal corrosion defects, it was necessary to verify that the choice of element type could accurately replicate the results from existing standard analytical models (Det Norske Veritas, 2012), experiments and numerical models (Netto et al, 2007;Sakakibara et al, 2008). In previous studies, 8-node solid continuum element with reduced integration (C3D8R) (Fallqvist, 2009;He et al, 2014;Jin, 2016;Zhang and Pan, 2020) and 4-node doubly-curved shell element with reduced integration (S4R) (Hauch and Bai, 2000;Liang et al, 2020;Sadowski and Rotter, 2013) have been used for numerical analysis of the collapse behaviour under external pressure and global buckling of both thick-walled and thin-walled pipelines. Hence, these elements are considered in the validation and mesh convergence exercise to select the most appropriate finite element for the current study.…”