Discrete and phase field models of dislocations and their macroscopic limits

位错的离散和相场模型及其宏观极限

• 批准号: 35756821
• 负责人: Professor Dr. Patrick Dondl
• 金额: --
• 依托单位: Institut für Angewandte Mathematik (IAM)
• 依托单位国家: 德国
• 项目类别: Research Units
• 财政年份: 2007
• 资助国家: 德国
• 起止时间: 2006-12-31 至 2014-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/35756821?language=en
• 关键词: Discrete; phase; field; models; dislocations

Plastic behaviour is ultimately related to the motion (and its inhibition) of individual dislocations. While there has been considerable progress in the computational modeling of the motion of individual dislocations and the local interaction of different dislocations, the large number of dislocations in a given specimens requires a multiscale approach to understand the mesoscopic and macroscopic effects of dislocations. The objective of this project is first to understand the passage from atomistic theories to mesoscopic theories and second to analyze effects of dislocation patterning in mesoscopic theories and compare the results with experimental observations (the latter being carried out in project P7).

塑性行为最终与单个位错的运动（及其抑制）有关。尽管在单个位错的运动和不同位错的局部相互作用的计算模型中取得了很大的进步，但给定标本中的大量位错需要一种多尺度方法来理解介质和宏观效果的错位效应。该项目的目的是首先了解从原子理论到介质理论的通过，其次是分析介镜理论中错位构图的影响，并将结果与​​实验观察结果进行比较（后者在项目P7中进行了）。