On the inverse identification of Lankford coefficients using geometrical changes under quasi-biaxial loading
On the inverse identification of Lankford coefficients using geometrical changes under quasi-biaxial loading
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准双轴载荷下利用几何变化逆辨识兰克福德系数
DOI:
10.1007/s12289-019-01498-z
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发表时间:
2019
影响因子:
2.4
通讯作者:
Merklein
中科院分区:
文献类型:
--
作者:
Graser;Lenzen;Merklein
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.
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DOI:
--
发表时间:
2010
期刊:
影响因子:
--
作者:
A. Raj;Raja Nagar
通讯作者:
Raja Nagar
DOI:
--
发表时间:
2017
期刊:
影响因子:
--
作者:
M. Gösling
通讯作者:
M. Gösling
DOI:
10.1088/1757-899x/159/1/012016
发表时间:
2016
期刊:
IOP Conference Series: Materials Science and Engineering
影响因子:
--
作者:
Suttner;Merklein
通讯作者:
Merklein
DOI:
--
发表时间:
2011
期刊:
影响因子:
--
作者:
Vera Goedel;M. Merklein
通讯作者:
M. Merklein
DOI:
10.1088/1742-6596/734/3/032107
发表时间:
2016
期刊:
Journal of Physics: Conference Series
影响因子:
--
作者:
A. Butz;J. Pagenkopf;M. Baiker;D. Helm
通讯作者:
D. Helm