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Development of methods for damage modeling with enhanced rheological models for the simulation of forming processes

开发损伤建模方法，使用增强的流变模型来模拟成形过程

基本信息

批准号：
184159192
负责人：
Professor Dr.-Ing. Anton Matzenmiller
金额：
--
依托单位：
Fachgebiet Numerische Mechanik
依托单位国家：
德国
项目类别：
Research Grants
财政年份：
2010
资助国家：
德国
起止时间：
2009-12-31 至 2017-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/184159192?language=en
关键词：
Development methods damage modeling enhanced

项目摘要

The research project is concerned with the modeling and simulation of thermomechanically coupled behavior of metallic materials for the application in industrial forming processes. The first funding period has been focused on the development of methods for the constitutive modeling, taking into account the evolution of damage in the material. For this purpose, the rheological concept for representing the thermoviscoplastic material behavior under the consideration of recovery processes and the storage / dissipation of energy during inelastic deformations, as proposed in preceding research works, has been enhanced for capturing thermomechanical consistently the damage processes as well. Moreover, based on a finite rheological network representation, a systematical approach has been developed to allow for the generalization of the constitutive equations of uniaxial rheological models for large deformations in the framework of nonlinear continuum mechanics.Besides some additional aspects of material modeling, the forthcoming third project year concentrates on the implementation of the constitutive model with damage into a commercial FE-programm for the explicit and implicit time integration of the equation of motion, as well as on the parameter identification and the validation of the model, to allow for the numerical analysis and the optimization of thermomechanically coupled, quasi-static and dynamical, complex practice-oriented forming processes.

本研究项目致力于金属材料在工业成形过程中的热力耦合行为的建模和仿真。第一个资助期的重点是开发本构模型的方法，同时考虑到材料中损伤的演变。为此，以前的研究工作中提出的表示热粘塑性材料在恢复过程和非弹性变形过程中能量存储/耗散的流变学概念已经得到增强，以一致地捕捉损伤过程。此外，基于有限流变学网络表示，发展了一种系统的方法，允许在非线性连续介质力学的框架下推广单轴大变形流变模型的本构方程。除了材料建模的一些额外方面，即将到来的第三个项目年集中于将含损伤的本构模型实现到商业有限元程序中，用于运动方程的显式和隐式时间积分，以及模型的参数识别和验证，以实现热力耦合、准静态和动态的、面向实际的复杂成形过程的数值分析和优化。