{"id":145,"date":"2012-05-16T10:23:19","date_gmt":"2012-05-16T08:23:19","guid":{"rendered":"http:\/\/www.lmgc.univ-montp2.fr\/perso\/emilien-azema\/?p=145"},"modified":"2019-03-03T11:13:26","modified_gmt":"2019-03-03T10:13:26","slug":"particle-shape-dependence-in-2d-granular-media-2","status":"publish","type":"post","link":"https:\/\/www.lmgc.univ-montp2.fr\/perso\/emilien-azema\/2012\/05\/16\/particle-shape-dependence-in-2d-granular-media-2\/","title":{"rendered":"Particle shape dependence in 2D granular media"},"content":{"rendered":"<div class=\"page\" title=\"Page 1\">\n<div class=\"layoutArea\">\n<div class=\"column\">\n<p>CEGEO, B. Saint-Cyr, K. Szarf, C. Voivret, E. Aze \u0301ma, V. Richefeu, J.-Y. Delenne, G. Combe, C. Nouguier-Lehon, P. Villard, P. Sornay, M. Chaze and F. Radjai,\u00a0EPL, 98 (2012) 44008<\/p>\n<\/div>\n<div class=\"page\" title=\"Page 5\">\n<div class=\"layoutArea\">\n<div class=\"column\">\n<div id=\"attachment_142\" style=\"width: 168px\" class=\"wp-caption alignleft\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-142\" class=\" wp-image-142\" src=\"http:\/\/www.lmgc.univ-montp2.fr\/perso\/emilien-azema\/wp-content\/uploadWP\/sites\/18\/2017\/03\/particle-shape-300x300.jpg\" alt=\"\" width=\"158\" height=\"158\" srcset=\"https:\/\/www.lmgc.univ-montp2.fr\/perso\/emilien-azema\/wp-content\/uploads\/sites\/18\/2017\/03\/particle-shape-300x300.jpg 300w, https:\/\/www.lmgc.univ-montp2.fr\/perso\/emilien-azema\/wp-content\/uploads\/sites\/18\/2017\/03\/particle-shape-150x150.jpg 150w, https:\/\/www.lmgc.univ-montp2.fr\/perso\/emilien-azema\/wp-content\/uploads\/sites\/18\/2017\/03\/particle-shape-768x767.jpg 768w, https:\/\/www.lmgc.univ-montp2.fr\/perso\/emilien-azema\/wp-content\/uploads\/sites\/18\/2017\/03\/particle-shape-700x699.jpg 700w, https:\/\/www.lmgc.univ-montp2.fr\/perso\/emilien-azema\/wp-content\/uploads\/sites\/18\/2017\/03\/particle-shape.jpg 1261w\" sizes=\"auto, (max-width: 158px) 100vw, 158px\" \/><p id=\"caption-attachment-142\" class=\"wp-caption-text\">Snapshots of the simulated packings in the densest isotropic state<\/p><\/div>\n<p>Particle shape is a key to the space-filling and strength properties of granular matter. We consider a shape parameter \u03b7 describing the degree of distortion from a perfectly spherical shape. Encompassing most specific shape characteristics such as elongation, angularity and non-convexity, \u03b7 is a low-order but generic parameter that we used in a numerical benchmark test for a systematic investigation of shape dependence in sheared granular packings composed of particles of different shapes. We find that the shear strength is an increasing function of \u03b7 with nearly the same trend for all shapes, the differences appearing thus to be of second order compared to \u03b7. We also observe a non-trivial behavior of packing fraction which, for all our simulated shapes, increases with \u03b7 from the random close packing fraction for disks, reaches a peak considerably higher than that for disks, and subsequently declines as \u03b7 is further increased. These findings suggest that a low-order description of particle shape accounts for the principal trends of packing fraction and shear strength. Hence, the effect of second-order shape parameters may be investigated by considering different shapes at the same level of \u03b7.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>CEGEO, B. Saint-Cyr, K. Szarf, C. Voivret, E. Aze \u0301ma, V. Richefeu, J.-Y. Delenne, G. Combe, C. Nouguier-Lehon, P. Villard, P. Sornay, M. Chaze and F. Radjai,\u00a0EPL, 98 (2012) 44008 Particle shape is a key to the space-filling and strength properties of granular matter. We consider a shape parameter \u03b7 describing the degree of distortion [&hellip;]<\/p>\n","protected":false},"author":15,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[],"class_list":["post-145","post","type-post","status-publish","format-standard","hentry","category-articles"],"_links":{"self":[{"href":"https:\/\/www.lmgc.univ-montp2.fr\/perso\/emilien-azema\/wp-json\/wp\/v2\/posts\/145","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.lmgc.univ-montp2.fr\/perso\/emilien-azema\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.lmgc.univ-montp2.fr\/perso\/emilien-azema\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.lmgc.univ-montp2.fr\/perso\/emilien-azema\/wp-json\/wp\/v2\/users\/15"}],"replies":[{"embeddable":true,"href":"https:\/\/www.lmgc.univ-montp2.fr\/perso\/emilien-azema\/wp-json\/wp\/v2\/comments?post=145"}],"version-history":[{"count":1,"href":"https:\/\/www.lmgc.univ-montp2.fr\/perso\/emilien-azema\/wp-json\/wp\/v2\/posts\/145\/revisions"}],"predecessor-version":[{"id":146,"href":"https:\/\/www.lmgc.univ-montp2.fr\/perso\/emilien-azema\/wp-json\/wp\/v2\/posts\/145\/revisions\/146"}],"wp:attachment":[{"href":"https:\/\/www.lmgc.univ-montp2.fr\/perso\/emilien-azema\/wp-json\/wp\/v2\/media?parent=145"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.lmgc.univ-montp2.fr\/perso\/emilien-azema\/wp-json\/wp\/v2\/categories?post=145"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.lmgc.univ-montp2.fr\/perso\/emilien-azema\/wp-json\/wp\/v2\/tags?post=145"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}