Micro-mechanical numerical analyses on damage of ductile metals

当前轻质结构工程的发展对所用材料提出了很高的要求。因此，有必要详细了解它们的行为，以便能够数值预测结构部件或复杂的创新轻质结构的安全性。在这种情况下，增强的连续损伤和失效模型将进行数值模拟广义动态加载条件下的延性金属的变形和失效行为。唯象模型是基于系统的数值分析的微观尺度上，能够检测到不同的损伤机制，最终断裂。基于数值结果，将有可能开发本构方程，并确定相应的材料参数，不能通过实验确定。本研究计画的目标之一是建立一套“数值实验”，用于结构工程、航空工程或汽车工业等实际学科的安全分析与使用寿命预测的参数辨识。

Current developments in lightweight structural engineering require high demands on used materials. Therefore, detailed knowledge on their behavior is necessary to be able to numerically predict the safety of structural components or complex innovative lightweight structures. In this context, enhancement of a continuum damage and failure model will be performed to numerically simulate the deformation and failure behavior of ductile metals under generalized dynamic loading conditions. The phenomenological model is based on systematic numerical analyses on the micro-scale to be able to detect different damage mechanisms up to final fracture. Based on numerical results it will be possible to develop constitutive equations and to identify corresponding material parameters which cannot be determined by experiments. One goal of this research project is to establish a set of "numerical experiments" used for parameter identification in analysis of safety and service life prediction in practical disciplines like structural and aviation engineering or car industry.