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Elyashiv, Hadar [Verfasser:in]; Bookman, Revital [Verfasser:in]; Siemann, Lennart [Verfasser:in]; Brink, Uri Ten [Verfasser:in]; Huhn, Katrin [Verfasser:in]

Numerical Characterization of Cohesive and Non-Cohesive ‘Sediments’ under Different Consolidation States Using 3D DEM Triaxial Experiments - [published Version]

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  • Medientyp: Sonstige Veröffentlichung; E-Artikel
  • Titel: Numerical Characterization of Cohesive and Non-Cohesive ‘Sediments’ under Different Consolidation States Using 3D DEM Triaxial Experiments
  • Beteiligte: Elyashiv, Hadar [Verfasser:in]; Bookman, Revital [Verfasser:in]; Siemann, Lennart [Verfasser:in]; Brink, Uri Ten [Verfasser:in]; Huhn, Katrin [Verfasser:in]
  • Erschienen: Basel : MDPI AG, 2020
  • Erschienen in: Processes 8 (2020), Nr. 10 ; Processes
  • Ausgabe: published Version
  • Sprache: Englisch
  • DOI: https://doi.org/10.15488/12621; https://doi.org/10.3390/pr8101252
  • Schlagwörter: Peak shear strength ; DEM ; Sediments ; Consolidation state ; Cohesion
  • Entstehung:
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  • Beschreibung: The Discrete Element Method has been widely used to simulate geo-materials due to time and scale limitations met in the field and laboratories. While cohesionless geo-materials were the focus of many previous studies, the deformation of cohesive geo-materials in 3D remained poorly characterized. Here, we aimed to generate a range of numerical ‘sediments’, assess their mechanical response to stress and compare their response with laboratory tests, focusing on differences between the micro- and macro-material properties. We simulated two endmembers—clay (cohesive) and sand (cohesionless). The materials were tested in a 3D triaxial numerical setup, under different simulated burial stresses and consolidation states. Variations in particle contact or individual bond strengths generate first order influence on the stress–strain response, i.e., a different deformation style of the numerical sand or clay. Increased burial depth generates a second order influence, elevating peak shear strength. Loose and dense consolidation states generate a third order influence of the endmember level. The results replicate a range of sediment compositions, empirical behaviors and conditions. We propose a procedure to characterize sediments numerically. The numerical ‘sediments’ can be applied to simulate processes in sediments exhibiting variations in strength due to post-seismic consolidation, bioturbation or variations in sedimentation rates.
  • Zugangsstatus: Freier Zugang
  • Rechte-/Nutzungshinweise: Namensnennung (CC BY)