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DTSTART;TZID=America/Detroit:20191101T150000
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SUMMARY:MICDE Seminar: Sanjay Govindjee\, Professor\, Civil Engineering\, University of California\, Berkeley
DESCRIPTION:Bio: Sanjay Govindjee is the Horace\, Dorothy\, and Katherine Johnson Professor in Engineering.  His main interests are in theoretical and computational mechanics with an emphasis on micro-mechanics of nonlinear phenomena in solid materials.  He was the winner of the inaugural Zienkiewicz Prize and Medal in 1998 and more recently received a 2018 Alexander von Humboldt Foundation Research Prize in honor of his lifetime achievements.  For the last two and half years\, he has been the PI and co-Director of the NSF NHERI SimCenter at Berkeley. \nThe NSF Natural Hazards Engineering Research Infrastructure (NHERI) Computation and Simulation Center (SimCenter) at Berkeley: An Overview\nIn October 2016\, the National Science Foundation awarded the NHERI SimCenter to Berkeley.  The SimCenter is the computational satellite to the eight experimental sites of the NHERI constellation.  Its primary goal is to advance natural hazards engineering through the use of simulation.  The center develops and stands-up open-source software to simulate the effects of seismic\, wind\, and water loads on structures with a focus on regional assessments of damage at high resolution under uncertainty.  The SimCenter’s work includes both research and educational components. \nThe SimCenter has just completed Year 3 or its original mandate and now offers a wide selection of user friendly front end applications that permit local as well as HPC cloud based execution of simulations.  Simulations can be of single detailed structural models subjected to a variety of harzards using state-of-the-art and state-of-the-practice loading methodologies.  They can also be of a larger regional nature using simpler models and further coupled to forward uncertainty propogation with Monte Carlo methods with or without surrogating.  Engineering demands can be further propogated into damage and loss\, downtime and recovery\, using Hazus methodologies\, FEMA P58 methods\, or user provided techniques with our hazard-blind framework.  All elements of the SimCenter’s software are desgined in a plug-n-play fashion to promote detailed research into natural hazard effects with the ability to see impacts on a larger scale. \nIn this presentation\, I will give an overview of the SimCenter’s recent activities and discuss research needs and how researchers can participate in the SimCenter’s activities\, along with a preview of upcoming developments anticipated in Year 4 \nProf. Govindjee is being hosted by Prof. Garikipati (ME).
URL:https://micde.umich.edu/event/fall2019-govindjee-ucberkeley/
LOCATION:1680 IOE\, 1205 BEAL AVE\, Ann Arbor\, MI\, 48109\, United States
CATEGORIES:Featured Events,MICDE Seminar Series
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DTSTART;TZID=America/Detroit:20191106T150000
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SUMMARY:MICDE Seminar: Pablo Zavattieri\, Professor\, Civil Engineering\, Purdue University
DESCRIPTION:Bio: Dr. Pablo Zavattieri is a Professor of Civil Engineering and University Faculty Scholar at Purdue University. Zavattieri received his BS/MS degrees in Nuclear Engineering from the Balseiro Institute (Argentina) and PhD in Aeronautics and Astronautics Engineering from Purdue University. He worked at the General Motors Research and Development Center as a staff researcher for 9 years\, where he led research activities in the general areas of computational solid mechanics\, smart and biomimetic materials. His current research lies at the interface between solid mechanics and materials engineering. He has focused on the fundamental aspects of how Nature uses elegant and efficient ways to make remarkable materials and their translation to engineering materials. He has contributed to the area of biomimetic materials by investigating the structure-function relationship of naturally-occurring high-performance materials at multiple length-scales\, combining state-of-the-art computational techniques and experiments to characterize the properties.   \nCLEVER ARCHITECTURES\, INTERFACES AND COMPETING MECHANISMS IN BIOLOGICAL MATERIALS\nNature uses modest constituents to synthesize composite materials with exceptional mechanical properties for structural and impact resistance purposes. In most cases\, these materials achieved outstanding mechanical properties avoiding the typical trade-offs often attained by manmade materials. While these materials require modern microscopy techniques to characterize their complex hierarchical structures\, most of our learnings come from the way these materials mitigate catastrophic damage\, revealing the most important mechanisms and features of their inner structure that contribute to energy dissipation and toughening. Considering the current progress in material synthesis and manufacturing\, these new concepts have converged to the field of architected materials.  In this talk\, I will describe some interesting mechanics problems that we encountered as we studied some extraordinary species\, and how we can translate these lessons learned to architected materials. In particular\, I will focus on a few examples related to how the combination of clever architectures\, interfaces\, material properties and competing mechanisms can promote delocalization to mitigate catastrophic failure\, hence\, improving toughness and impact resistance without sacrificing other important mechanical properties. Most of this discussion is driven by how we can eventually translate these lessons learned to the development and manufacturing of architected materials. \nProf. Zavattieri is being hosted by Prof. Evgueni Flipov (CEE). If you would like to meet with him during his visit\, please send an email to micde-events@umich.edu. If you are an MICDE or CEE student and would like to join Prof. Zavattieri for lunch please RSVP by Monday\, November 4th. 
URL:https://micde.umich.edu/event/micde-seminar-pablo-zavattieri-professor-civil-engineering-purdue-university/
LOCATION:1303 EECS\, 1301 Beal Ave\, Ann Arbor\, MI\, 48109\, United States
CATEGORIES:Featured Events,MICDE Seminar Series
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DTSTART;TZID=America/Detroit:20191115T150000
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SUMMARY:MICDE Seminar: Irene Beyerlein\, Professor\, Mechanical Engineering\, University of California\, Santa Barbara
DESCRIPTION:Bio: Irene J. Beyerlein is a Professor at the University of California at Santa Barbara (UCSB) with a joint appointment in the Mechanical Engineering and Materials Departments. She currently holds the Robert Mehrabian Interdisciplinary Endowed Chair in the College of Engineering. After receiving her Ph.D. degree in Theoretical and Applied Mechanics at Cornell University in 1997\, she began a postdoctoral appointment as a J.R. Oppenheimer Fellow at Los Alamos National Laboratory\, where she remained on the scientific staff in the Theoretical Division\, until 2016\, when she joined UCSB. She has published one book\, nine book chapters\, and more than 300 peer-reviewed articles in the field of structural composites\, materials processing\, multiscale modeling of microstructure/property relationships\, deformation mechanisms\, and polycrystalline plasticity. She is an Editor for Acta Materialia and Scripta Materialia and an Associate Editor for Modelling and Simulation in Materials Science and Engineering.  In recent years\, she has been awarded the Los Alamos National Laboratory Fellow’s Prize for Research (2012)\, the International Plasticity Young Researcher Award (2013)\, the TMS Distinguished Scientist/Engineering Award (2018)\, and the Brimacombe Metal (2019). \nA COMPOSITE OF SUPERIOR PROPERTIES WITH NANOSTRUCTURED COMPOSITE MATERIAL\nMany future engineering systems will rely on high-performance metallic materials that are several times stronger and tougher than those in use today. In many situations\, these superior properties will be desired in harsh environments\, such as elevated temperatures\, at high rates\, and under irradiation. Nanolaminates\, built from stacks of crystalline layers\, each with nanoscale individual thicknesses\, are proving to exhibit a composite of many of these target properties. Examples span from nanotwinned materials to biphase nanolaminates\, comprised of alternating nano-thick layers that differ in orientation\, chemistry and crystal structure. Studies on these materials report exceptional properties far beyond a volume average value of their constituents\, such as strengths that are over five to ten times higher\, hardness values that are several orders of magnitude higher\, and unprecedented microstructural stability in harsh environments\, such as irradiation\, sudden impact\, or elevated temperatures. While the combination of properties is clearly attractive\, one roadblock to applying the nanolaminate concept to any general composite material system is their complex\, highly anisotropic deformation behavior\, making them less reliable than coarsely structured materials. Critical to designing the material nanostructure to achieve uniformity and reliability is understanding and predicting the strength properties of nanostructure materials based on known conditions and measurable variables\, such as basic nanostructure size scales and chemical composition. Multiscale models for conventional coarse-grained materials have been in development for several decades\, but analogous versions for nanostructured materials require extensions to explicitly account for the overriding dominance of internal boundaries on these microstructure/property relationships.  The computational materials challenge lies in how to represent the discrete and statistical dislocation glide processes in nanostructured materials so that the profound influence of the fine nanoscale crystals can be properly replicated in simulation. In this talk\, we will present recent examples of computational techniques and some unanticipated couplings between nanostructural size effects and microstructural evolution and strength that arise from their application. \nProf. Beyerlein is being hosted by Prof. Fan (ME). 
URL:https://micde.umich.edu/event/fall2019-beyerlein-ucsb/
LOCATION:1680 IOE\, 1205 BEAL AVE\, Ann Arbor\, MI\, 48109\, United States
CATEGORIES:Featured Events,MICDE Seminar Series
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