Development of a Robust Coupled Material Point Method

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Abstract

The material point method (MPM) shows promise for the simulation of large deformations in history-dependent materials such as soils. However, in general, it suffers from oscillations and inaccuracies due to its use of numerical integration and stress recovery at non-ideal locations. The development of a hydro-mechanical model, which does not suffer from oscillations is presented, including a number of benchmarks which prove its accuracy, robustness and numerical convergence. In this study, particular attention has been paid to the formulation of two-phase coupled material point method and the mitigation of volumetric locking caused numerical instability when using low-order finite elements for (nearly) incompressible problems. The numerical results show that the generalized interpolation material point (GIMP) method with selective reduced integration (SRI), patch recovery and composite material point method (CMPM) (named as GC-SRI-patch) is able to capture key processes such as pore pressure build-up and consolidation.
Original languageEnglish
Title of host publicationChallenges and Innovations in Geomechanics - Proceedings of the 16th International Conference of IACMAG - Volume 1
EditorsMarco Barla, Alice Di Donna, Donatella Sterpi
Place of PublicationCham
PublisherSpringer
Pages819-826
Number of pages8
ISBN (Electronic)978-3-030-64514-4
ISBN (Print)9783030645137
DOIs
Publication statusPublished - 2021
Event16th International Conference of IACMAG (postponed): International Association for Computer Methods and Advances in Geomechanics - Torino, Italy
Duration: 5 May 20218 May 2021
http://www.iacmag2020.org

Publication series

NameLecture Notes in Civil Engineering
Volume125
ISSN (Print)2366-2557
ISSN (Electronic)2366-2565

Conference

Conference16th International Conference of IACMAG (postponed)
Abbreviated titleIACMAG 2021
CountryItaly
CityTorino
Period5/05/218/05/21
Internet address

Keywords

  • Consolidation
  • Coupled behavior
  • Hydro-mechanical
  • Large deformation
  • Material point method
  • Reduced integration

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