Finite element simulation has become an important tool of process and production design in various fields, especially in the automotive industry. The calculation of forming processes in the early concept phase of new cars allows virtual adaptions, which can reduce costs of later phases in the product development significantly. Therefore, the precise characterization and modelling of the material behavior is necessary to ensure a robust and reliable numerical process design. The mechanical properties of numerous materials are highly influenced by the rolling or extrusion direction in the production process. This necessitates the characterization of materials in different loading directions. However, depending on the dimensional aspects of the semi-finished product, the manufacturing of specimens can be challenging or even impossible. Thus, in this investigation, an innovative, indirect approach for the identification of the Lankford coefficient in transversal direction is presented. Based on numerical and experimental data of layer compression tests the Lankford coefficient is determined by inverse modelling of the resulting specimen contour. Due to the characteristics of the layer compression test, it can even be used for semi-finished products with small transversal dimensions like extruded profiles. The presented methodology is on the one hand verified by conventional uniaxial tensile tests for aluminum as well as steel blank material. On the other hand it is used to determine Lankford coefficients for an aluminum extrusion hollow profile and the inversely identified material model is validated by comparison of strain distributions of experimental and numerical square tube bending tests.

有限元模拟已成为各个领域，尤其是汽车工业中过程和生产设计的重要工具。新车早期概念阶段的成型过程计算可以进行虚拟调整，从而可以显着降低产品开发后期阶段的成本。因此，必须对材料的行为进行精确的表征和建模，以确保稳健而可靠的数值过程设计。在生产过程中，多种材料的机械性能会受到轧制或挤压方向的极大影响。这就需要在不同的加载方向上表征材料。然而，取决于半成品的尺寸方面，标本的制造可能具有挑战性，甚至是不可能的。因此，在这项研究中，提出了一种新颖的，间接的横向识别兰克福德系数的方法。根据层压缩测试的数值和实验数据，通过对所得试样轮廓进行逆向建模来确定Lankford系数。由于层压缩测试的特性，它甚至可以用于横向尺寸较小的半成品，例如挤压型材。一方面，通过铝和钢坯料的常规单轴拉伸试验验证了所提出的方法。