报告人：项阳教授

              香港科技大学

题目：Energy and Dynamics of Grain Boundaries Based on Underlying Mircrostructure

时间：2018年03月08日下午15:00

地点：海韵实验楼108

报告摘要：Grain boundaries are the interfaces of grains with different orientations in polycrystalline materials. Energetic and dynamic properties of grain boundaries play essential roles in the mechanical and plastic behaviors of the materials. These properties of grain boundaries strongly depend on their microscopic structures. We present continuum models for the energy and dynamics of grain boundaries based on the continuum distribution of the line defects (dislocations or disconnections) on them.  The long-range elastic interaction between the line defects is included in the continuum models to maintain stable microstructure on grain boundaries during the evolution. The continuum models is able to describe both normal motion and tangential translation of the grain boundaries due to both coupling and sliding effects that were observed in atomistic simulations and experiments.

报告人简介：项阳教授，香港科技大学数学系教授，在清华大学获学士学位，在美国纽约大学Courant研究所获博士学位。。

联系人：邱建贤教授

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