Penetration of Steel Catenary Riser in Soft Clay Seabed: Finite-Element and Finite-Volume Methods

Hawlader, Bipul; Dutta, Sujan; Fouzder, Anup; Zakeri, Arash

doi:10.1061/(asce)gm.1943-5622.0000474

Cited by 27 publications

(1 citation statement)

References 39 publications

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“…A number of other advanced numerical approaches are available for the analysis of geotechnical problems involving large plastic deformations. These include the material point method, [31][32][33][34] smoothed particle hydrodynamics, [35][36][37][38] and the distinct element method, [39][40][41][42][43][44] although at present the most widely used approaches are FE-based methods such as the arbitrary Lagrangian-Eulerian, 45,46 remeshing and interpolation technique with small strain (RITSS), [47][48][49][50] and coupled Eulerian-Lagrangian (CEL) [51][52][53][54][55][56][57][58] techniques. The RITSS method originally developed by Hu and Randolph 47 is an improved arbitrary Lagrangian-Eulerian approach that divides a large-deformation problem into a series of small-deformation FE analyses.…”

Section: Application To Geotechnical Problemsmentioning

confidence: 99%

Modelling large plastic deformations of cohesive soils using sequential limit analysis

Kong

Martin

Byrne

2017

Num Anal Meth Geomechanics

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Summary This paper introduces sequential limit analysis (SLA) as a method for modelling large plastic deformations of purely cohesive materials such as undrained clay. The method involves solving a series of consecutive small‐deformation plastic collapse problems using finite element limit analysis, thus ensuring high levels of accuracy, efficiency, and robustness. The techniques needed to develop an SLA implementation for two‐dimensional (plane strain) problems are described in detail, including model geometry updating routines, treatment of rigid bodies, interfaces and boundaries, and periodic remeshing and interpolation of field variables. A simple total stress‐based constitutive model is used to account for strain softening and strain rate effects. Extensive verifications and validations are performed using analytical solutions and physical model test results, comparing both collapse loads and failure mechanisms, to demonstrate the effectiveness of the SLA approach. Additional solution quality checks on the bracketing discrepancy between lower‐bound and upper‐bound limit analysis solutions, and on the incompressibility of the rigid‐plastic material, are also presented.

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