{"659787":{"#nid":"659787","#data":{"type":"event","title":"PhD Defense by Noel R. Flores","body":[{"value":"\u003Cul\u003E\r\n\t\u003Cli\u003EDate: 8\/12\/2022\u003C\/li\u003E\r\n\t\u003Cli\u003ETime: 2:00 PM\u003C\/li\u003E\r\n\t\u003Cli\u003ELocation: SEB 122\u003C\/li\u003E\r\n\u003C\/ul\u003E\r\n\r\n\u003Cp\u003ENoel R. Flores\u003Cbr \/\u003E\r\n(Advisor: Dr. Lauren K. Stewart)\u003Cbr \/\u003E\r\nwill defend a doctoral thesis entitled,\u003Cbr \/\u003E\r\nExperimental Methods for Understanding the Performance of Impulsively\u003Cbr \/\u003E\r\nLoaded Cross\u2010Laminated Timber Panels\u003Cbr \/\u003E\r\nOn\u003Cbr \/\u003E\r\nFriday, August 12 at 2:00 p.m.\u003Cbr \/\u003E\r\nSEB Room 122\u003Cbr \/\u003E\r\nAbstract\u003Cbr \/\u003E\r\nCross\u2010laminated timber (CLT) is an innovative multi\u2010layered engineered wood product with\u003Cbr \/\u003E\r\nproven performance as a structural material in extreme events, including earthquake, wind,\u003Cbr \/\u003E\r\nand fire. Although research is limited, CLT has shown great potential for application in the force\u003Cbr \/\u003E\r\nprotection of structures. This research bridges the gap between the quasi\u2010static and high strain\u003Cbr \/\u003E\r\nrate loading regimes by investigating two areas that have remained unstudied or elusive, i.e.,\u003Cbr \/\u003E\r\nrolling shear failure of CLT under impulsive, blast\u2010like loading and intermediate strain rates in\u003Cbr \/\u003E\r\nCLT. A novel center\u2010point testing system and methodology was developed that permits the\u003Cbr \/\u003E\r\napplication of impulsive loading in a highly controlled and repeatable manner. The testing\u003Cbr \/\u003E\r\nsystem is highly adaptable and is capable of testing a variety of materials of variable widths,\u003Cbr \/\u003E\r\nlengths, and thicknesses. The impactor is interchangeable to permit changes to the load\u003Cbr \/\u003E\r\ncondition. Realistic boundary conditions can be simulated empirically via changes to the\u003Cbr \/\u003E\r\nboundary condition rotational rigidity. The testing system was validated and calibrated through\u003Cbr \/\u003E\r\na series of validation tests, finite element simulations, and via the development of a new\u003Cbr \/\u003E\r\nexperimental method. The Direct Force Method (DFM) is a new experimental method for\u003Cbr \/\u003E\r\nempirically determining the force history applied to a specimen that controls for inertial effects\u003Cbr \/\u003E\r\nthat arise during testing. Experiments featured multiple test phases: quasi\u2010static testing of\u003Cbr \/\u003E\r\nundamaged CLT specimens, impulsive testing of undamaged CLT specimens, and residual\u003Cbr \/\u003E\r\ncapacity testing of damaged CLT specimens. Short span\u2010to\u2010depth ratio CLT specimens are used\u003Cbr \/\u003E\r\nthroughout testing to encourage the development of shear modes of failure. As verified by the\u003Cbr \/\u003E\r\ntest results, the testing system consistently produced shear modes of failure and facilitated the\u003Cbr \/\u003E\r\nobservation of CLT panel behavior under impulsive loading. The testing programs validated\u003Cbr \/\u003E\r\nseveral hypotheses including the conditions that elicit shear modes of failure, strain\u2010rate\u003Cbr \/\u003E\r\nenhancement of CLT mechanical properties in the impulsive loading regime, and boundary\u003Cbr \/\u003E\r\ncondition rigidity\u0026rsquo;s role in affecting change in CLT panel behavior. The conclusions made on CLT\u003Cbr \/\u003E\r\npanel behavior under impulsive loading and CLT panel residual capacity and survivability\u003Cbr \/\u003E\r\nprovide validation for its implementation as a structural material in force protection\u003Cbr \/\u003E\r\napplications.\u003Cbr \/\u003E\r\nCommittee\u003Cbr \/\u003E\r\n\u0026bull; Dr. Lauren K. Stewart \u0026ndash; School of Civil and Environmental Engineering (Advisor)\u003Cbr \/\u003E\r\n\u0026bull; Dr. T. Russell Gentry \u0026ndash; School of Architecture (Co\u2010Advisor)\u003Cbr \/\u003E\r\n\u0026bull; Dr. Laurence J. Jacobs \u0026ndash; College of Engineering\u003Cbr \/\u003E\r\n\u0026bull; Dr. Lawrence F. Kahn \u0026ndash; School of Civil and Environmental Engineering\u003Cbr \/\u003E\r\n\u0026bull; Dr. Karl F. Meyer \u0026ndash; School of Civil and Environmental Engineering\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"Experimental Methods for Understanding the Performance of Impulsively Loaded Cross\u2010Laminated Timber Panels"}],"uid":"27707","created_gmt":"2022-08-01 13:57:02","changed_gmt":"2022-08-01 13:57:02","author":"Tatianna Richardson","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2022-08-12T15:00:00-04:00","event_time_end":"2022-08-12T17:00:00-04:00","event_time_end_last":"2022-08-12T17:00:00-04:00","gmt_time_start":"2022-08-12 19:00:00","gmt_time_end":"2022-08-12 21:00:00","gmt_time_end_last":"2022-08-12 21:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"221981","name":"Graduate Studies"}],"categories":[],"keywords":[{"id":"100811","name":"Phd Defense"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1788","name":"Other\/Miscellaneous"}],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"78751","name":"Undergraduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}}}