{"id":363,"date":"2018-09-11T09:59:33","date_gmt":"2018-09-11T07:59:33","guid":{"rendered":"http:\/\/www.lmgc.univ-montp2.fr\/perso\/emilien-azema\/?p=363"},"modified":"2019-03-03T11:12:57","modified_gmt":"2019-03-03T10:12:57","slug":"scaling-behavior-of-cohesive-self-gravitating-aggregates","status":"publish","type":"post","link":"https:\/\/www.lmgc.univ-montp2.fr\/perso\/emilien-azema\/2018\/09\/11\/scaling-behavior-of-cohesive-self-gravitating-aggregates\/","title":{"rendered":"Scaling behavior of cohesive self-gravitating aggregates"},"content":{"rendered":"<div class=\"page\" title=\"Page 1\">\n<div class=\"layoutArea\">\n<div class=\"column\">\n<p>Emilien Az\u00e9ma, \u00a0Paul S\u00e1nchez, and Daniel J. Scheeres. Physical review E (Rapid Communication) 98 030901(R) (2018)<\/p>\n<\/div>\n<div class=\"page\" title=\"Page 1\">\n<div class=\"layoutArea\">\n<div class=\"column\">\n<div id=\"attachment_365\" style=\"width: 248px\" class=\"wp-caption alignleft\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-365\" class=\" wp-image-365\" src=\"http:\/\/www.lmgc.univ-montp2.fr\/perso\/emilien-azema\/wp-content\/uploadWP\/sites\/18\/2018\/09\/Fig1a-300x224.png\" alt=\"\" width=\"238\" height=\"178\" srcset=\"https:\/\/www.lmgc.univ-montp2.fr\/perso\/emilien-azema\/wp-content\/uploads\/sites\/18\/2018\/09\/Fig1a-300x224.png 300w, https:\/\/www.lmgc.univ-montp2.fr\/perso\/emilien-azema\/wp-content\/uploads\/sites\/18\/2018\/09\/Fig1a-768x573.png 768w, https:\/\/www.lmgc.univ-montp2.fr\/perso\/emilien-azema\/wp-content\/uploads\/sites\/18\/2018\/09\/Fig1a-700x522.png 700w, https:\/\/www.lmgc.univ-montp2.fr\/perso\/emilien-azema\/wp-content\/uploads\/sites\/18\/2018\/09\/Fig1a.png 778w\" sizes=\"auto, (max-width: 238px) 100vw, 238px\" \/><p id=\"caption-attachment-365\" class=\"wp-caption-text\">Snapshots of a simulated granular asteroid under diamet- rical compression for (a) \u03b5h = 0 and (b) \u03b5h = 0.1. Force chains are represented by lines joining the centers of two touching particles. Compressive forces in red, and tensile forces in blue.<\/p><\/div>\n<p>By means of extensive three-dimensional contact dynamics simulations, we analyze the strength properties and microstructure of a granular asteroid, modeled as a self-gravitating cohesive granular aggregate composed of spherical particles, and subjected to diametrical compression tests. We show that, for a broad range of system parameters (shear rate, cohesive forces, asteroid diameter), the behavior can be described by a modified inertial number that incorporates interparticle cohesion and gravitational forces. At low inertial numbers, the behavior is ductile with a well-defined stress peak that scales with internal pressure with a prefactor \u2243 0.9. As the inertial number increases, both the prefactor and fluctuations around the mean increase, evidencing a dynamical crisis resulting from the destabilizing effect of particle inertia. From a micromechanical description of the contact and force networks, we propose a model that accounts for solid fraction, local stress, particle connectivity, and granular texture. In the limit of small inertial numbers, we find a very good agreement of the theoretical estimate of compressive strength, evidencing the major role of these structural parameters for the modeled aggregates.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Emilien Az\u00e9ma, \u00a0Paul S\u00e1nchez, and Daniel J. Scheeres. Physical review E (Rapid Communication) 98 030901(R) (2018) By means of extensive three-dimensional contact dynamics simulations, we analyze the strength properties and microstructure of a granular asteroid, modeled as a self-gravitating cohesive granular aggregate composed of spherical particles, and subjected to diametrical compression tests. We show that, [&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-363","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\/363","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=363"}],"version-history":[{"count":3,"href":"https:\/\/www.lmgc.univ-montp2.fr\/perso\/emilien-azema\/wp-json\/wp\/v2\/posts\/363\/revisions"}],"predecessor-version":[{"id":368,"href":"https:\/\/www.lmgc.univ-montp2.fr\/perso\/emilien-azema\/wp-json\/wp\/v2\/posts\/363\/revisions\/368"}],"wp:attachment":[{"href":"https:\/\/www.lmgc.univ-montp2.fr\/perso\/emilien-azema\/wp-json\/wp\/v2\/media?parent=363"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.lmgc.univ-montp2.fr\/perso\/emilien-azema\/wp-json\/wp\/v2\/categories?post=363"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.lmgc.univ-montp2.fr\/perso\/emilien-azema\/wp-json\/wp\/v2\/tags?post=363"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}