An experiment-based cohesive-frictional constitutive model for cemented materials

S. M.C.U. Senanayake, A. Haque, H. H. Bui

Research output: Contribution to journalArticleResearchpeer-review

Abstract

Experiment-based damage laws at the contact bond level are often absent in the computational modelling of cemented materials using cohesive contact-bond models. In this paper, in-situ X-Ray Computed Tomography on element-scale cement bonds subjected to pure compression, shear and tensile loading was conducted to investigate their failure mechanisms and associated damage laws. A new cohesive-frictional constitutive model was subsequently developed using results obtained from X-Ray CT tests. The new constitutive model was capable of describing the behaviour of contact bonds subjected to complex loading conditions, including mixed-mode and compression damage. The new model was then implemented in an open-access Discrete Element Code (YADE) to simulate several challenging laboratory-scale tests (e.g., triaxial, Brazilian and Splitting tests) and very good agreements with the experimental data were achieved.

Original languageEnglish
Article number104862
Number of pages21
JournalComputers and Geotechnics
Volume149
DOIs
Publication statusPublished - Sep 2022

Keywords

  • Cemented soils
  • Constitutive model
  • Damage
  • Discrete element method
  • Plasticity
  • X-Ray CT

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