{"id":219,"date":"2014-05-16T15:37:17","date_gmt":"2014-05-16T13:37:17","guid":{"rendered":"http:\/\/www.lmgc.univ-montp2.fr\/perso\/emilien-azema\/?p=219"},"modified":"2019-03-03T11:12:59","modified_gmt":"2019-03-03T10:12:59","slug":"dense-granular-flows-structure-and-microscopic-origins-of-internal-friction","status":"publish","type":"post","link":"https:\/\/www.lmgc.univ-montp2.fr\/perso\/emilien-azema\/2014\/05\/16\/dense-granular-flows-structure-and-microscopic-origins-of-internal-friction\/","title":{"rendered":"Dense Granular Flows : Structure and Microscopic Origins of Internal Friction"},"content":{"rendered":"<p>E. Az\u00e9ma and F. Radjai, pp. 347-353, in Advances in bifurcation and degradation in geomaterials (Springer, Dordrecht), \u00e9dit\u00e9 par K ;-T. Chau and J. Zhao, ISBN 978-3-319-13506-9.<\/p>\n<div class=\"page\" title=\"Page 1\">\n<div class=\"layoutArea\">\n<div class=\"column\">\n<p><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-217 alignleft\" src=\"http:\/\/www.lmgc.univ-montp2.fr\/perso\/emilien-azema\/wp-content\/uploadWP\/sites\/18\/2017\/03\/Unknown.jpeg\" alt=\"\" width=\"122\" height=\"184\" \/>By means of three-dimensional Contact Dynamics simulations, we inves- tigate the microstructural properties of sheared granular packings by varying sys- tematically the inertial number I from the quasi-static to the collisional regime. A detailed analysis of the connectivity of the particles reveals that the transition be- tween the regimes is correlated to profound changes of the nature of the contact net- work. In particular, we show that the increase of internal friction angle with inertial number is mainly a consequence of contact anisotropy. As the inertial number in- creases, the role of force chains decreases and that of friction mobilization increases as long as percolating force chains are present in the system. A detailed analysis of the spatial correlations of floating particles, i.e., particles without bearing con- tacts, reveals the occurrence of \u201cfluidized\u201d volumes in the dense flow regime, which increase in size and coalesce at the approach of the collisional regime.<\/p>\n<\/div>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>E. Az\u00e9ma and F. Radjai, pp. 347-353, in Advances in bifurcation and degradation in geomaterials (Springer, Dordrecht), \u00e9dit\u00e9 par K ;-T. Chau and J. Zhao, ISBN 978-3-319-13506-9. By means of three-dimensional Contact Dynamics simulations, we inves- tigate the microstructural properties of sheared granular packings by varying sys- tematically the inertial number I from the quasi-static [&hellip;]<\/p>\n","protected":false},"author":15,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4],"tags":[],"class_list":["post-219","post","type-post","status-publish","format-standard","hentry","category-books_chapter"],"_links":{"self":[{"href":"https:\/\/www.lmgc.univ-montp2.fr\/perso\/emilien-azema\/wp-json\/wp\/v2\/posts\/219","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=219"}],"version-history":[{"count":1,"href":"https:\/\/www.lmgc.univ-montp2.fr\/perso\/emilien-azema\/wp-json\/wp\/v2\/posts\/219\/revisions"}],"predecessor-version":[{"id":220,"href":"https:\/\/www.lmgc.univ-montp2.fr\/perso\/emilien-azema\/wp-json\/wp\/v2\/posts\/219\/revisions\/220"}],"wp:attachment":[{"href":"https:\/\/www.lmgc.univ-montp2.fr\/perso\/emilien-azema\/wp-json\/wp\/v2\/media?parent=219"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.lmgc.univ-montp2.fr\/perso\/emilien-azema\/wp-json\/wp\/v2\/categories?post=219"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.lmgc.univ-montp2.fr\/perso\/emilien-azema\/wp-json\/wp\/v2\/tags?post=219"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}