{"id":654,"date":"2020-08-04T13:57:43","date_gmt":"2020-08-04T11:57:43","guid":{"rendered":"http:\/\/www.lmgc.univ-montp2.fr\/perso\/emilien-azema\/?p=654"},"modified":"2021-12-10T10:44:06","modified_gmt":"2021-12-10T09:44:06","slug":"combined-effects-of-contact-friction-and-particle-shape-on-strength-properties-and-microstructure-of-sheared-granular-media","status":"publish","type":"post","link":"https:\/\/www.lmgc.univ-montp2.fr\/perso\/emilien-azema\/2020\/08\/04\/combined-effects-of-contact-friction-and-particle-shape-on-strength-properties-and-microstructure-of-sheared-granular-media\/","title":{"rendered":"Combined effects of contact friction and particle shape on strength properties and microstructure of sheared granular media"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">Theechalit Binaree, Emilien Az\u00e9ma, Nicolas Estrada, Mathieu Renouf, and Itthichai Preechawuttipong Phys. Rev. E 102, 022901 \u2013 Published 3 August 2020<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">We present a systematic numerical investigation concerning the combined effects of sliding friction and particle shape (i.e., angularity) parameters on the shear strength and microstructure of granular packings. Sliding friction at contacts varied from 0 (frictionless particles) to 0.7, and the particles were irregular polygons with an increasing number of sides, ranging from triangles to disks. We find that the effect of local friction on shear strength follows the same trend for all shapes. Strength first increases with local friction and then saturates at a shape-dependent value. In contrast, the effect of angularity varies, depending on the level of sliding friction. For low friction values (i.e., under 0.3), the strength first increases with angularity and then declines for the most angular shapes. For high friction values, strength systematically increases with angularity. At the microscale, we focus on the connectivity and texture of the contact and force networks. In general terms, increasing local friction causes these networks to be less connected and more anisotropic. In contrast, increasing particle angularity may change the network topology in different directions, directly affecting the macroscopic shear strength. These analyses and data constitute a first step toward understanding the joint effect of local variables such as friction and grain shape on the macroscopic rheology of granular systems.<br><\/p>\n\n\n\n<figure class=\"wp-block-image is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/www.lmgc.univ-montp2.fr\/perso\/emilien-azema\/wp-content\/uploadWP\/sites\/18\/2020\/08\/ForceNetwork-700x1056.jpg\" alt=\"\" class=\"wp-image-655\" width=\"554\" height=\"832\" \/><figcaption>Particle-scale views of the normal force network of six packings, for different values of local friction \u03bcs and particle angularity. Forces are represented as lines, whose thickness is proportional to the force magnitude.<\/figcaption><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>Theechalit Binaree, Emilien Az\u00e9ma, Nicolas Estrada, Mathieu Renouf, and Itthichai Preechawuttipong Phys. Rev. E 102, 022901 \u2013 Published 3 August 2020 We present a systematic numerical investigation concerning the combined effects of sliding friction and particle shape (i.e., angularity) parameters on the shear strength and microstructure of granular packings. Sliding friction at contacts varied from [&hellip;]<\/p>\n","protected":false},"author":15,"featured_media":655,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[],"class_list":["post-654","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-articles"],"_links":{"self":[{"href":"https:\/\/www.lmgc.univ-montp2.fr\/perso\/emilien-azema\/wp-json\/wp\/v2\/posts\/654","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=654"}],"version-history":[{"count":1,"href":"https:\/\/www.lmgc.univ-montp2.fr\/perso\/emilien-azema\/wp-json\/wp\/v2\/posts\/654\/revisions"}],"predecessor-version":[{"id":657,"href":"https:\/\/www.lmgc.univ-montp2.fr\/perso\/emilien-azema\/wp-json\/wp\/v2\/posts\/654\/revisions\/657"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.lmgc.univ-montp2.fr\/perso\/emilien-azema\/wp-json\/wp\/v2\/media\/655"}],"wp:attachment":[{"href":"https:\/\/www.lmgc.univ-montp2.fr\/perso\/emilien-azema\/wp-json\/wp\/v2\/media?parent=654"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.lmgc.univ-montp2.fr\/perso\/emilien-azema\/wp-json\/wp\/v2\/categories?post=654"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.lmgc.univ-montp2.fr\/perso\/emilien-azema\/wp-json\/wp\/v2\/tags?post=654"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}