项目名称: 纳米孪晶材料塑性及断裂力学行为数值模拟与理论研究
项目编号: No.11272003
项目类型: 面上项目
立项/批准年度: 2013
项目学科: 数理科学和化学
项目作者: 郑勇刚
作者单位: 大连理工大学
项目金额: 86万元
中文摘要: 青年基金项目主要围绕材料力学行为的多尺度模拟方法和多尺度分析开展研究工作,主要研究了耦合分子动力学-有限元多尺度计算方法、初步研发了分子动力学和有限元及其耦合程序、开展了一维纳米材料力学行为的理论模型研究及数值分析、纳米通道流体流动行为多尺度分析、生物环境中的金纳米粒子力学行为多尺度分析以及多尺度有限元方法研究。相关研究成果在计算力学及其交叉领域的国内外重要学术期刊上发表论文12篇(其中SCI收录12篇,EI收录11篇,影响因子3.0以上6篇),相关研究成果得到了国内外同行的关注与正面引用,截止目前SCI他引30次。本项目将在已有研究工作的基础上进一步开展纳米孪晶材料塑性及断裂力学行为研究,发展纳米孪晶材料基本模型生成算法,揭示材料的塑性变形及断裂机理,建立可用于纳米孪晶材料的尺寸和应变速率关联理论模型,为优化材料微结构,制备和应用高强高韧纳米晶体材料提供理论依据。
中文关键词: 纳米孪晶材料;塑性变形机理;断裂行为;分子动力学;格子玻尔兹曼方法
英文摘要: The current project of the Young Scientists Fund supported by NSFC mainly focuses on the development of multiscale simulation method for and multiscale analysis of mechanical behaviors of materials. During the execution of the project, we studied the coupling technique for molecular dynamics and finite element methods, developed basic computer codes for these two methods and their coupling method. We also carried out theoretical/numerical analysis of one-dimensional nanostructured materials and multiscale analysis of the transport behavior of fluid confined in nanochannel, proposed multiscale coarse-grained model for the simulation of golden nanoparticles in biological environment and a new kind of multiscale finite element method for the mechanical analysis of liquid cell materials. Based on the results of these studies, 12 scientific papers have been published on several well-known journals for computational mechanics and related disciplines, among which 12 and 11 papers have been indexed by SCI and EI, respectively, and 6 papers been published in journals with impact factor larger than 3.0. In addition, our works have attracted much attention and many papers have been cited positively by researchers. Until now, these papers have attracted 30 times of citation by SCI-indexed papers. Based on the atomistic, con
英文关键词: nanotwined materials;plastic deformation mechanism;fracture behavior;molecular dynamics;lattice Boltzmann method