MATERIALS DESIGN FROM BOTTOM TO UP BASED ON THE MULTI-SCALE COMPUTATION FRAMEWORK

摘要：

In this paper,a multi-scale framework is established to guide the engineering design of materials at various spatial and temporal scales.By performing molecular dynamics (MD) simulations,a hyper-surface is formulated to describe the combined size and strain rate effects on the plastic yield stress of fcc metals.Molecular dynamics (MD) simulation is restricted by its loading rate,length and time scales.To bridge micro-scale and macro-scale simulations,we couple continuum mechanics and 3D discrete dislocation dynamics (DD),in which the plastic strain is explicitly computed by the motion of discrete dislocations.This approach is verified by compared with analytical results.

关键词： Multi-scale Molecular dynamics Dislocation dynamics FEM Hyper-surface

作者: Z.Zhuang Z.L.Liu X.C.You Y.Guo

作者单位: FML,Department of Engineering Mechanics,Tsinghua University,Beijing 100084,China

会议类型: 国际会议

会议名称: 第二届国际非均质材料力学会议(The Second International Conference on Heterogeneous Material Mechanics)

会议地点: 安徽黄山

会议语种:英文

页码: 374-377

在线出版日期: 2008-06-03（万方平台首次上网日期，不代表论文的发表时间）