{"id":247856,"date":"2025-10-07T09:45:31","date_gmt":"2025-10-07T07:45:31","guid":{"rendered":"https:\/\/cimne.com\/?p=247856"},"modified":"2025-10-30T14:32:50","modified_gmt":"2025-10-30T13:32:50","slug":"cimne-coffee-talk-rotational-behaviour-in-granular-media-from-a-macroscopic-perspective-by-max-winkelmann","status":"publish","type":"post","link":"https:\/\/cimne.com\/es\/cimne-coffee-talk-rotational-behaviour-in-granular-media-from-a-macroscopic-perspective-by-max-winkelmann\/","title":{"rendered":"CIMNE Coffee Talk: \u201cRotational behaviour in granular media from a macroscopic perspective\u201d by Max Winkelmann"},"content":{"rendered":"<p>[et_pb_section fb_built=\u00bb1&#8243; _builder_version=\u00bb4.27.4&#8243; _module_preset=\u00bbdefault\u00bb global_colors_info=\u00bb{}\u00bb][et_pb_row _builder_version=\u00bb4.27.4&#8243; _module_preset=\u00bbdefault\u00bb global_colors_info=\u00bb{}\u00bb][et_pb_column type=\u00bb4_4&#8243; _builder_version=\u00bb4.27.4&#8243; _module_preset=\u00bbdefault\u00bb global_colors_info=\u00bb{}\u00bb][et_pb_text _builder_version=\u00bb4.27.4&#8243; _module_preset=\u00bbdefault\u00bb hover_enabled=\u00bb0&#8243; global_colors_info=\u00bb{}\u00bb sticky_enabled=\u00bb0&#8243;]<\/p>\n<h5 class=\"cimne blue-background\">ABSTRACT<\/h5>\n<p>In granular materials, friction and particle shape at the microscale strongly influence the bulk response, particularly the material&#8217;s rotational behaviour. These factors affect how grains rotate, interact, and dissipate energy. Using discrete-to-continuum (D2C) upscaling methods, we map discrete particle data onto continuous fields to study these effects. When rotational behaviour is included, additional micropolar fields and new dissipative mechanisms emerge. Through simulations of a split-bottom shear cell, we show how friction and particle shape give rise to these micropolar effects\u2014such as couple stresses and relative rotations\u2014that localise in shear bands and influence material dissipation. Understanding these effects paves the way for more realistic continuum models of granular matter.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-247860 size-full\" src=\"https:\/\/cimne.com\/wp-content\/uploads\/2025\/10\/20251028-Coffee-Talk-Granual-Media-Banner.png\" alt=\"Plot showing how particle shape affects rotation. Higher aspect ratio particles rotate more near the center (x\/d = 0). Six curves represent aspect ratios from 0.20 to 5.00, with matching symbols and particle illustrations.\" width=\"579\" height=\"450\" \/><\/p>\n<h5 class=\"cimne blue-background\">SPEAKER<\/h5>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignleft wp-image-247863 size-thumbnail\" src=\"https:\/\/cimne.com\/wp-content\/uploads\/2025\/10\/20251028-Coffee-Talk-Max-Winkelmann-150x150.png\" alt=\"Max Winkelmann\" width=\"150\" height=\"150\" \/>Mr. <a href=\"https:\/\/www.linkedin.com\/in\/maxwinkelmann\/\">Max Winkelmann<\/a> is a PhD student jointly affiliated with the University of Twente, the Netherlands, and the University of Edinburgh, UK, working under the supervision of Stefan Luding, Vanessa Magnanimo, and Stefanos-Aldo Papanicolopulos. His research focuses on the theoretical mechanics of granular media, with particular interest in linking particle-scale interactions to continuum-scale descriptions. He obtained his BSc and MSc degrees in Engineering Science from the Technical University of Berlin, where he specialised in continuum material theory. He is currently in the final year of his PhD studies.<\/p>\n<p>[\/et_pb_text][\/et_pb_column][\/et_pb_row][\/et_pb_section]<\/p>\n","protected":false},"excerpt":{"rendered":"<p>ABSTRACT In granular materials, friction and particle shape at the microscale strongly influence the bulk response, particularly the material&#8217;s rotational behaviour. These factors affect how grains rotate, interact, and dissipate energy. Using discrete-to-continuum (D2C) upscaling methods, we map discrete particle data onto continuous fields to study these effects. When rotational behaviour is included, additional micropolar [&hellip;]<\/p>\n","protected":false},"author":9,"featured_media":247863,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_et_pb_use_builder":"on","_et_pb_old_content":"","_et_gb_content_width":"","slim_seo":{"title":"CIMNE Coffee Talk: \u201cRotational behaviour in granular media from a macroscopic perspective\u201d by Max Winkelmann - CIMNE","description":"ABSTRACT In granular materials, friction and particle shape at the microscale strongly influence the bulk response, particularly the material's rotational behav"},"footnotes":""},"categories":[103,95],"tags":[],"class_list":["post-247856","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-coffee-talk","category-events"],"acf":[],"_links":{"self":[{"href":"https:\/\/cimne.com\/es\/wp-json\/wp\/v2\/posts\/247856","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/cimne.com\/es\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/cimne.com\/es\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/cimne.com\/es\/wp-json\/wp\/v2\/users\/9"}],"replies":[{"embeddable":true,"href":"https:\/\/cimne.com\/es\/wp-json\/wp\/v2\/comments?post=247856"}],"version-history":[{"count":0,"href":"https:\/\/cimne.com\/es\/wp-json\/wp\/v2\/posts\/247856\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/cimne.com\/es\/wp-json\/wp\/v2\/media\/247863"}],"wp:attachment":[{"href":"https:\/\/cimne.com\/es\/wp-json\/wp\/v2\/media?parent=247856"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cimne.com\/es\/wp-json\/wp\/v2\/categories?post=247856"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cimne.com\/es\/wp-json\/wp\/v2\/tags?post=247856"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}