数学与系统科学研究院

计算数学所学术报告

报告人：       Prof. Wei CAI

                 Department of Mechanical Engineering, Stanford University

报告题目： Understanding Crystal Plasticity by Dislocation Dynamics

报告摘要：

  Quantitative prediction of crystals plastic strength based on their microscopic physics has been the dream of computational materials scientists for many years. It remains a grand challenge to date, because the activities of dislocations - the underlying carrier of plasticity, are very complex and span a wide range of length and time scales. This talk presents several advances towards reaching this goal by connecting atomistic and higher scale models of crystal plasticity. First, large-scale molecular dynamics simulations reveal an important yet previously not appreciated transition in the mode of dislocation motion in iron. Second, a self-consistent continuum theory for dislocation is developed which removes the singularity associated in the classical theory. Third, a massively parallel dislocation dynamics code models the collective behavior of a large number of interacting dislocation lines and directly computes materials response to virtual mechanical tests.

报告时间： 2005年6月9日 下午4：00-5：00

报告地点： 科技综合楼三层311报告厅

           欢迎大家参加!