Numerical Simulation of CPT with the Clay and Sand Model (CASM) Including Effects of Bonding

Helmut F. Schweiger*, Laurin Hauser

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference paperpeer-review


The simulation of cone penetration tests (CPT) poses still a challenge to numerical modelling because large deformations and large displacements have to be considered. In this work the Particle Finite Element Method code G-PFEM, which employs an updated Lagrangian description, is utilized. The use of linear elements in combination with a stabilized mixed formulation and frequent remeshing of critical regions ensures computational efficiency. The well-known Clay and Sand Model (CASM), which is a model based on critical state soil mechanics principles, has been implemented in G-PFEM and extended to account for effects of bonding and destructuration. Cone penetration in a low permeable silt under undrained conditions has been simulated and the influence of the degree of bonding and the rate of debonding on calculated cone resistance is evaluated. In an additional study the influence of the shape of the yield surface, which can be controlled by two input parameters in the model, on cone resistance is investigated.

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
PublisherSpringer Science and Business Media Deutschland GmbH
Number of pages10
ISBN (Print)9783030645137
Publication statusPublished - 2021
Event16th International Conference on Computer Methods and Advances in Geomechanics: IACMAG 2021 - Turin, Italy
Duration: 5 May 20218 May 2021

Publication series

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


Conference16th International Conference on Computer Methods and Advances in Geomechanics
Abbreviated titleIACMAG 2021


  • Clay and Sand Model
  • Cone penetration
  • Debonding
  • Particle Finite Element Method
  • Silt

ASJC Scopus subject areas

  • Civil and Structural Engineering

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