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A dynamic large deformation finite element method based on mesh regeneration

A dynamic large deformation finite element method based on mesh regeneration
A dynamic large deformation finite element method based on mesh regeneration

In this paper, a large deformation finite element (LDFE) approach termed 'remeshing and interpolation technique with small strain (RITSS)' is extended from static to dynamic soil-structure interaction applications. In addition, a technique termed 'element addition' is developed to improve the computational efficiency of both static and dynamic LDFE analyses that involve moving boundaries. The RITSS approach is based on frequent mesh generation to avoid element distortion. In dynamic RITSS, the field variables mapped from the old to the new mesh involve not only the stresses and material properties, but also the nodal velocities and accelerations. Using the element addition technique, new soil elements are attached to the domain boundaries periodically when the soil near the boundaries becomes affected by large displacements of the structure. The procedures of this Abaqus-based dynamic LDFE analysis and element addition technique are detailed, and the robustness of the techniques is validated and assessed through three example analyses: penetration of a flat footing into a half-space and movement of rigid and deformable landslides down slopes.

Clays, Finite element method, Footing, Landslides, Large deformation, Penetration
0266-352X
192-201
Wang, D.
95bbe41e-377d-467d-bcd4-f5e0118c111f
Randolph, M.F.
75caa33a-e630-4ae8-84cd-758797bf9633
White, D.J.
a986033d-d26d-4419-a3f3-20dc54efce93
Wang, D.
95bbe41e-377d-467d-bcd4-f5e0118c111f
Randolph, M.F.
75caa33a-e630-4ae8-84cd-758797bf9633
White, D.J.
a986033d-d26d-4419-a3f3-20dc54efce93

Wang, D., Randolph, M.F. and White, D.J. (2013) A dynamic large deformation finite element method based on mesh regeneration. Computers and Geotechnics, 54, 192-201. (doi:10.1016/j.compgeo.2013.07.005).

Record type: Article

Abstract

In this paper, a large deformation finite element (LDFE) approach termed 'remeshing and interpolation technique with small strain (RITSS)' is extended from static to dynamic soil-structure interaction applications. In addition, a technique termed 'element addition' is developed to improve the computational efficiency of both static and dynamic LDFE analyses that involve moving boundaries. The RITSS approach is based on frequent mesh generation to avoid element distortion. In dynamic RITSS, the field variables mapped from the old to the new mesh involve not only the stresses and material properties, but also the nodal velocities and accelerations. Using the element addition technique, new soil elements are attached to the domain boundaries periodically when the soil near the boundaries becomes affected by large displacements of the structure. The procedures of this Abaqus-based dynamic LDFE analysis and element addition technique are detailed, and the robustness of the techniques is validated and assessed through three example analyses: penetration of a flat footing into a half-space and movement of rigid and deformable landslides down slopes.

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More information

Accepted/In Press date: 6 July 2013
e-pub ahead of print date: 6 August 2013
Published date: October 2013
Keywords: Clays, Finite element method, Footing, Landslides, Large deformation, Penetration

Identifiers

Local EPrints ID: 420157
URI: https://eprints.soton.ac.uk/id/eprint/420157
ISSN: 0266-352X
PURE UUID: 0645d71b-b76e-433b-a2ea-6cf8015a77e6
ORCID for D.J. White: ORCID iD orcid.org/0000-0002-2968-582X

Catalogue record

Date deposited: 27 Apr 2018 16:30
Last modified: 17 Jul 2019 00:25

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