Validation of material models for sheet metals using an innovative tool

对于所有模型，在使用之前进行验证对于板材的材料模型也是必不可少的。在一个基础上，开发了一个创新的工具，它允许一个更有效和更高效的材料模型验证的可能性。新工具生成验证数据的基本能力得到了证明。该研究项目的目的是使用创新的工具概念开发和实施板材材料模型的验证策略。重点是屈服轨迹及其硬化行为。在第一阶段，将使用三种不同材料类别（IF钢，DP钢，铝）的材料进行广泛的实验研究。一方面，对测试结果的不同影响进行了研究，另一方面，为以下工作包生成了一个全面的数据库。为了明确验证硬化机制，在工具上研究了试样相对于轧制方向的不同取向。此外，预拉伸试样进行检查的新工具，这对材料模型的硬化行为方面的数值研究时，提出了非常复杂的要求。在第二阶段，建立各种模拟模型，在此基础上生成与实验进行比较的数值数据。这需要复杂的材料模型，以展示所用模型的各自可能性和局限性。此外，不同的材料模型的参数进行了研究，就其敏感性的模拟结果。以这种方式获得的知识有助于确定因果关系，并能够更好地评估模拟结果。最后，将实验结果与数值计算结果进行了比较。在此基础上，得出了不同材料模型使用的一般性建议。非预拉伸和预拉伸验证试验的进行和评价2.在试验的基础上建立数值分析和基本灵敏度分析的仿真模型3.验证所用材料模型并推导一般建议

As for all models, a validation prior to their use is essential for material models of sheet materials as well. In a groundwork, an innovative tool was developed, which allows a more effective and efficient possibility of material model validation for sheets. The fundamental ability of the new tool to generate data for validation was demonstrated. Thereby the basic ability of the new tool to generate data for validation was shown.The aim of the research project is to develop and implement a validation strategy for material models of sheet materials using the innovative tool concept. The focus is on the yield locus and its hardening behavior. In the first phase, extensive experimental investigations using materials from three different material classes (IF-steel, DP-steel, aluminum) will be carried out. On the one hand, different influences on the test results are investigated, on the other hand, a comprehensive database for the following work packages is generated. In order to decidedly validate the hardening mechanisms, different orientations of the specimen with regard to the rolling direction are investigated on the tool. In addition, pre-stretched specimens are examined on the new tool, which imposes very complex requirements on a material model with regard to the hardening behavior when numerically investigated. In the second phase, various simulation models are built, on the basis of which numerical data for comparison with the experiments is generated. This requires complex material models in order to demonstrate the respective possibilities and limitations of the models used. Furthermore, different parameters of the material models are investigated with regard to their sensitivity to the simulation results. The knowledge gained in this way helps to identify cause-effect relationships and to be able to better assess the simulation results. Finally, the results of the experimental investigations are compared with the numerical results. Based on this, general recommendations for the use of different material models can be derived.The main points of the research project are as follows:1. Conduction and evaluation of non-pre-stretched and pre-stretched validation tests2. Building of simulation models for numerical analyses and fundamental sensitivity analyses on the basis of the tests performed3. Validation of the used material models and deduction of general recommendations