%0 Journal Article
%T Effects of particle shape mixture on strength and structure of sheared granular materials
%+ Chiang Mai University (CMU)
%+ Physique et Mécanique des Milieux Divisés (PMMD)
%A Binaree, Theechalit
%A Preechawuttipong, Itthichai
%A Azéma, Emilien
%Z Royal Golden Jubilee Ph.D Program (Grant No. PHD/0062/2558) under Thailand Research Fund (TRF) and French Embassy in Thailand
%< avec comité de lecture
%@ 2470-0045
%J Physical Review E
%I American Physical Society (APS)
%V 100
%N 1
%P 012904
%8 2019-07
%D 2019
%R 10.1103/PhysRevE.100.012904
%Z Engineering Sciences [physics]/Mechanics [physics.med-ph]/Mechanics of materials [physics.class-ph]
%Z Engineering Sciences [physics]/Mechanics [physics.med-ph]/Materials and structures in mechanics [physics.class-ph]
%Z Engineering Sciences [physics]/Mechanics [physics.med-ph]/Solid mechanics [physics.class-ph]Journal articles
%X Using bi-dimensional discrete element simulations, the shear strength and microstructure of granular mixtures composed of particles of different shapes are systematically analyzed as a function of the proportion of grains of a given number of sides and the combination of different shapes (species) in one sample. We varied the angularity of the particles by varying the number of sides of the polygons from 3 (triangles) up to 20 (icosagons) and disks. The samples analyzed were built keeping in mind the following cases: (1) increase of angularity and species starting from disks; (2) decrease of angularity and increase of species starting from triangles; (3) random angularity and increase of species starting from disks and from polygons. The results show that the shear strength vary monotonically with increasing numbers of species (it may increase or decrease), even in the random mixtures (case 3). At the micro-scale, the variation in shear strength as a function of the number of species is due to different mechanisms depending on the cases analyzed. It may result from the increase of both the geometrical and force anisotropies, from only a decrease of frictional anisotropy, or from compensation mechanisms involving geometrical and force anisotropies.
%G English
%2 https://hal.science/hal-02269096/document
%2 https://hal.science/hal-02269096/file/Art_Azema_al_PRE_2019.pdf
%L hal-02269096
%U https://hal.science/hal-02269096
%~ CNRS
%~ LMGC
%~ MIPS
%~ UNIV-MONTPELLIER
%~ TEST-HALCNRS
%~ UM-2015-2021