BEGIN:VCALENDAR PRODID;X-RICAL-TZSOURCE=TZINFO:-//Calagator//EN CALSCALE:GREGORIAN X-WR-CALNAME:Calagator METHOD:PUBLISH VERSION:2.0 BEGIN:VTIMEZONE TZID;X-RICAL-TZSOURCE=TZINFO:America/Los_Angeles BEGIN:DAYLIGHT DTSTART:20160313T020000 RDATE:20160313T020000 TZOFFSETFROM:-0800 TZOFFSETTO:-0700 TZNAME:PDT END:DAYLIGHT END:VTIMEZONE BEGIN:VEVENT CREATED;VALUE=DATE-TIME:20160513T205439Z DTEND;TZID=America/Los_Angeles;VALUE=DATE-TIME:20160523T120000 DTSTART;TZID=America/Los_Angeles;VALUE=DATE-TIME:20160523T100000 DTSTAMP;VALUE=DATE-TIME:20160513T205439Z LAST-MODIFIED;VALUE=DATE-TIME:20160513T205439Z UID:http://calagator.org/events/1250470262 DESCRIPTION:Title: Drucker-Prager Elastoplasticity for Sand Animation \;\nSpeaker: Joseph Teran\, UCLA \;\n \;\nAbstract: \;\nWe simu late sand dynamics using an elastoplastic\, continuum assumption. We dem onstrate that the Drucker-Prager plastic flow model combined with a Henc ky-strain-based hyperelasticity accurately recreates a wide range of vis ual sand phenomena with moderate computational expense. We use the Mater ial Point Method (MPM) to discretize the governing equations for its nat ural treatment of contact\, topological change and history dependent con stitutive relations. The Drucker-Prager model naturally represents the f rictional relation between shear and normal stresses through a yield str ess criterion. We develop a stress projection algorithm used for enforci ng this condition with a non-associative flow rule that works naturally with both implicit and explicit time integration. We demonstrate the eff icacy of our approach on examples undergoing large deformation\, collisi ons and topological changes necessary for producing modern visual effect s. \;\n \;\nBio: \;\nJoseph Teran is a professor of applied mat hematics at UCLA. His research is focused on numerical methods for parti al differential equations arising in classical physics. This includes co mputational solids\, computational fluids\, multi-material interactions\ , fracture dynamics and computational biomechanics. Exciting application s include computer graphics and movie special effects at Walt Disney Ani mation. Professor Teran was a recipient of a 2011 Presidential Early Car eer Award for Scientists and Engineers (PECASE) and a 2010 Young Investi gator award from the Office of Naval Research. In 2008\, Discover Magazi ne named him one of the 50 “Best Brains in Science” which lauded him and other young scientists as “young visionaries who are transforming the w ay we understand the world”.\n\nImported from: http://calagator.org/even ts/1250470262 URL:http://web.cecs.pdx.edu/~fliu/seminar/flyer-teran.pdf SUMMARY:Computer Science Colloquium: Drucker-Prager Elastoplasticity for Sand Animation LOCATION:Portland State University Fourth Avenue Building (FAB) Room FAB 86-01: 1900 Southwest 4th Avenue\, Portland OR 97201 US SEQUENCE:1 END:VEVENT END:VCALENDAR