{"170331":{"#nid":"170331","#data":{"type":"event","title":"Interrogating a Granular Material: Force Networks, State Variables, and Acoustics","body":[{"value":"\u003Ch3\u003E\u003Cstrong\u003ESchool of Physics Nonlinear Science \u0026amp; Mathematical Physics: Presenting Karen Daniels, North Carolina State University\u003C\/strong\u003E\u003C\/h3\u003E\u003Cp\u003EGranular materials exhibit large spatial variations in their response to external loading, whether static or dynamic. As such, continuum models of properties such as the shear modulus and sound speed often fail. A promising alternative is to build an understanding of bulk behaviors from measurements at the particle scale, by analogy with the statistical mechanics of thermal systems. I will describe experiments in which we utilize photoelastic particles and piezo-embedded \u0027smart\u0027 particles to explore how two familiar properties -- temperature equilibration and densities of states -- might arise in this new context.\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"\u003Ch2 class=\u0022mainTitle\u0022\u003EInterrogating a Granular Material: Force Networks, Sstate Variables, and Acoustics\u003C\/h2\u003E","format":"limited_html"}],"field_summary_sentence":[{"value":"Interrogating a granular material: force networks, state variables, and acoustics"}],"uid":"27664","created_gmt":"2012-11-12 11:17:32","changed_gmt":"2016-10-08 02:01:11","author":"Alison Morain","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2012-11-14T14:00:00-05:00","event_time_end":"2012-11-14T15:00:00-05:00","event_time_end_last":"2012-11-14T15:00:00-05:00","gmt_time_start":"2012-11-14 19:00:00","gmt_time_end":"2012-11-14 20:00:00","gmt_time_end_last":"2012-11-14 20:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"related_links":[{"url":"https:\/\/www.physics.gatech.edu\/seminars-colloquia\/series\/nonlinear-science-and-mathematical-physics\/karen-daniels-20121114","title":"https:\/\/www.physics.gatech.edu\/seminars-colloquia\/series\/nonlinear-science-..."}],"groups":[{"id":"126011","name":"School of Physics"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cp\u003E\u003Ca href=\u0022mailto:alison.morain@physics.gatech.edu\u0022\u003Ealison.morain@physics.gatech.edu\u003C\/a\u003E\u003C\/p\u003E","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}}}