US-France Cooperative Research: Investigations on DynamicalDislocation - Crack Interactions

美法合作研究：动态位错-裂纹相互作用的研究

• 批准号: 8914718
• 负责人: Elias Aifantis
• 金额: $ 1.23万
• 依托单位: Michigan Technological University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1990
• 资助国家: 美国
• 起止时间: 1990-03-15 至 1992-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8914718&HistoricalAwards=false
• 关键词: US; France; Cooperative; Research; Investigations

This award will support collaborative research between Dr. Elias Aifantis, Michigan Technological University and Dr. Joel Lepinoux, Laboratory for Physical Metallurgy, Poitiers, France. The objective of the project is the study of dislocation-crack interactions under dynamical situations. Various conditions including mixed loading modes, as well as the influence of environment and microstructure will be considered. Two general approaches will be used: 1) classical dislocation simulations in two dimensions and 2) nonlinear dislocation dynamics. The possibility of using the cellular automata method will also be explored. The results of this research may lead to a framework for considering crack stability and growth, as well as a new fundamental understanding of fracture toughness related phenomena. This project will benefit from the complementary expertise of the two investigators. Both groups have been working for several years on the problem of self organization of disloca- tions by using two different methods: nonlinear dynamics (US) and simulation with cellular automata (France).

该奖项将支持密歇根理工大学的Elias Aifantis博士和法国普瓦捷物理冶金实验室的Joel Lepinoux博士之间的合作研究。该项目的目的是研究动态情况下的位错-裂纹相互作用。包括混合加载模式在内的各种条件，以及环境和微观结构的影响将被考虑在内。将采用两种一般方法：1)二维经典位错模拟和2)非线性位错动力学。我们还将探讨使用元胞自动机方法的可能性。本研究的结果可能会导致考虑裂纹稳定性和扩展的框架，以及对断裂韧性相关现象的新的基本认识。该项目将受益于两位研究者的互补专业知识。这两个小组已经用两种不同的方法研究位错的自组织问题好几年了：非线性动力学（美国）和元胞自动机模拟（法国）。