讲座：Probabilistic Multiscale Modeling of Composite Materials，地点：A706
摘要：This talk presents Dr. Yun’s recent research thrust on probabilistic multiscale modeling for aerospace nanocomposite materials. The overarching goal of this project is to develop a general computational and design platform for ICME (Integrated Computational Materials Engineering) material and structural analysis of advanced composites. Focusing on structure-property relationships, molecular dynamic (MD) simulation and micromechanics theory characterized physical properties of graphene and CNT nanocomposites and their correlation with nanoscale parameters such as cross-linking density and morphological factors. Next, a general probabilistic modeling method was integrated to realize 3D randomly oriented and aligned nanocomposites. Variabilities from nanoscale features propagate to the microscale domain where effects of geometric uncertainties such as random fiber packing are entailed. To bridge multiple scales, a probabilistic computational homogenization method based on two-scale asymptotic expansion theory was utilized. Effects of statistical parameters of subscale properties on the RVE size will be presented. Finally, a novel sequential multiscale inverse analysis method will also be introduced that can potentially be used for optimal design of nanocomposites.
个人简介:Dr. Gunjin Yunholds Ph.D. in structural engineering and mechanics (University of Illinois Urbana-Champaign in 2006). Prior to joining Seoul National University in 2016, he was a tenured associate professor at The University of Akron, Ohio, USA from 2008.Dr. Yunhas research interests in multiscale analysis of composite materials, smart sensing materials, inverse problems in engineering mechanics, stochastic finite element/uncertainty quantification and integrated computational materials engineering (ICME).http://asml.snu.ac.kr