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理学院青年学术论坛第35期——Various sizes of sliding event bursts in the plastic flow of metallic glasses based on a spatiotemporal dynamic model

发布者: [发表时间]:2014-12-19 [来源]: [浏览次数]:

讲座题目: Various sizes of sliding event bursts in the plastic flow of metallic glasses based on a spatiotemporal dynamic model

主讲人:任景莉 教授

主持人:田玉 副教授

间:20141219日(周五)上午1000-1100

点:主楼1214

主要内容:

This talk presents a spatiotemporal dynamic model based on the interaction between multiple shear bands in the plastic flow of metallic glasses during compressive deformation. Various sizes of sliding events burst in the plastic deformation as the generation of different scales of shear branches occurred; microscopic creep events and delocalized sliding events were analyzed based on the established model. The spatially uniform solutions and traveling wave solution are discussed. The phase space of the spatially uniform system applied in this study reflected the chaotic state of the system at a lower strain rate. Moreover, numerical simulation showed that the microscopic creep events were manifested at a lower strain rate, whereas the delocalized sliding events were manifested at a higher strain rate.

主讲人简介:

郑州大学数学与统计学院教授,博士生导师。2006年河南省杰出青年基金获得者,2008年德国洪堡高级研究员基金获得者,2010年入选教育部新世纪优秀人才支持计划,2011年获得河南省青年科技奖,2012年河南省省级学术带头人,2013年入选郑州大学首批高端人才支持计划。研究方向为常微分方程与应用数学方法,近几年主要关注材料数学的研究,在Phys. Rev. B, Appl. Phys. Lett., Nonl. Anal. RWA等数学或材料物理期刊上发表SCI论文34篇。主持三项国家自然科学基金项目(2006-20082010-20122013-2016)。