A New Shear Test for Sheet Metal Characterization
A New Shear Test for Sheet Metal Characterization
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DOI：
10.1002/srin.201000163
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发表时间：
2011-04-01
影响因子：
2.2
通讯作者：
Tekkaya, A. E.
中科院分区：
文献类型：
--
作者：
Brosius, A.;Yin, Q.;Tekkaya, A. E.
为了通过有限元模拟来预测板料成形过程中的塑性材料行为，剪切试验对于识别材料参数是有用的。针对现有扭剪试验装置存在的不足，提出了一种新的双桥扭剪试验装置。应力和应变计算来自所提出的几何特征。夹持情况和剪切计的尺寸进行了调查，以评估所获得的流动曲线的质量。它示出，该试样是合适的，以确定各向异性屈服行为和表征预应变试样，例如由于冷轧，当屈服轨迹由背应力张量移动。
In order to predict plastic material behavior for sheet forming processes by finite element simulation, shear tests are useful to identify material parameters. Since the existing shear test setups have certain disadvantages, a new twin bridge torsion shear test is proposed. Stress and strain calculation is derived from the presented geometrical features. The clamping situation and the shear gauge dimensions are investigated to evaluate the quality of the obtained flow curves. It is shown that this test specimen is suitable to determine anisotropic yield behavior and to characterize prestrained specimen, for instance due to cold rolling, when the yield locus is shifted by a backstress tensor.