Discrete element analysis of density dependency of granular materials under different directions of true triaxial cyclic loading

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Published: Sep 28, 2023
DOI: https://doi.org/10.14456/apst.2023.102
Keywords:
Cyclic loading Density DEM Granular materials True triaxial loading

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Daraporn Phusing
Department of Civil Engineering, Faculty of Engineering at Sriracha, Kasetsart University Sriracha Campus, Chonburi, Thailand
Korchoke Chantawarangkul
Department of Civil Engineering, Faculty of Engineering, Kasetsart University, Bangkok, Thailand
Pulpong Pongvithayapanu
Department of Civil Engineering, Faculty of Engineering at Sriracha, Kasetsart University Sriracha Campus, Chonburi, Thailand

Abstract

This paper introduces the macro and micro response behaviors of dense, medium, and loose samples of granular materials where the initial void ratio eo was 0.57, 0.67, and 0.73, respectively, under five different directions of true triaxial cyclic loading tests using the discrete element method (DEM). The experimental results with similar cyclic stress paths were applied to validate the DEM results. The results showed variations in the principal stress-strain relationship as well as the strain increment vector of each sample in the 1st and 5th cycles. There was a qualitative similarity between the strain increment vectors for the experimental results and the DEM. The micro response analysis indicated that there were substantial differences in the coordination number as well as the sliding contact fraction of all samples under different directions of cyclic testing. At the macro-micro level, the stress ratio and fabrics of the strong contact forces presented strong unity even under different directions of the cyclic principal stresses, which increased with the number of cycles. However, there was only one weak unity for the different levels of density.

Article Details

How to Cite
Phusing, D., Chantawarangkul, K., & Pongvithayapanu, P. (2023). Discrete element analysis of density dependency of granular materials under different directions of true triaxial cyclic loading. Asia-Pacific Journal of Science and Technology, 28(06), APST–28. https://doi.org/10.14456/apst.2023.102
Issue
Vol. 28 No. 06 (2023): NOV-DEC
Section
Research Articles
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This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

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