Abstract
A comparative study of the application of four different types of finite-elements namely elbow (ring), shell, solid, and generalised plane strain to model the post collapse bending behaviour and flow area reduction in an initially straight thick cylindrical pipe made of a highly non-linear material is presented to evaluate their effectiveness. Large strain-large bending FE analyses were performed in each case and the results of moment-curvature relations and pipe-section deformation predictions are compared. The study shows that although solid elements do provide a reasonably accurate and effective solution these are computationally more expensive, while the generalised plane strain finite-elements yield an equally effective and reasonably accurate solution to the problem but are less expensive.
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