Determining a representative element volume for DEM simulations of samples with non-circular particles
نویسندگان
چکیده
• Effects of particle shape and sample density on representative element volume (REV) for granular materials were investigated. The minimum REV reduces with increasing packing density. is sensitive to the characteristics measured. Analysis fluctuations around critical state stress ratio can be used determine REV. number contacts in samples indicates effect aspect Numerical studies particles or system size required attain a discrete method (DEM) simulations have almost always considered spherical circular particles. This study considers how many are needed 2D 2-disc cluster where (AR) was systematically varied. Dense loose assemblies simulated. assessed both by considering repeatability static shearing behaviour biaxial compression tests, investigating measured observed behaviour. data generally improved size. dense more repeatable suggesting that characteristic Although overall responses during shear deformation similar irrespective sizes, smaller size, higher responses. coefficient variation provide insight as whether attained. AR influences thus REV; this explained influence within samples.
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ژورنال
عنوان ژورنال: Particuology
سال: 2022
ISSN: ['1674-2001', '2210-4291']
DOI: https://doi.org/10.1016/j.partic.2021.10.007