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Micromechanical Insights of Strain Rate Effect on Crushable Granular Materials

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Micro to MACRO Mathematical Modelling in Soil Mechanics

Part of the book series: Trends in Mathematics ((TM))

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Abstract

Granular materials exhibit significant strain rate dependent response depending upon the size, morphology, and mineralogy of grains as observed in several existing experimental analyses. However, most of such analyses only focused on the macroscopic behavior of the granular assembly. The objective of the present study is to explore the effects of different and sudden strain rate variation at the grain scale level and link it with the macroscopic response utilizing discrete element modelling (DEM). In addition, the effects of crushability of grains on the rate-dependent response and vice-versa are studied. The study simulates conventional drained triaxial compression to capture the rate-dependent behavior for both crushable and non-crushable granular materials. The simulation results indicate that particle crushing alters the coordination number and contact force distribution, and thus reduces the macroscopic deviatoric stress response. However, with increasing strain-rate, the possibility of crushing reduces and thus strain hardening is observed.

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Acknowledgments

The second author wishes to thank DORD IIT Kanpur (grant no. IITK/CE/2014156) and CSIR (grant no. 22(0732)/17/EMR-II) for the financial support of this research on crushable granular materials.

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Authors and Affiliations

  1. Department of Civil Engineering, IIT Kanpur, Kanpur, India

    Soukat Kumar Das & Arghya Das

Authors
  1. Soukat Kumar Das
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  2. Arghya Das
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Correspondence to Soukat Kumar Das .

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Editors and Affiliations

  1. DICEAM, University Mediterranea, Reggio Calabria, Italy

    Pasquale Giovine

  2. DICeA, University of Florence, Florence, Italy

    Paolo Maria Mariano

  3. DICEAM, University Mediterranea, Reggio Calabria, Italy

    Giuseppe Mortara

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Das, S.K., Das, A. (2018). Micromechanical Insights of Strain Rate Effect on Crushable Granular Materials. In: Giovine, P., Mariano, P., Mortara, G. (eds) Micro to MACRO Mathematical Modelling in Soil Mechanics. Trends in Mathematics. Birkhäuser, Cham. https://doi.org/10.1007/978-3-319-99474-1_10

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