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首页> 外文期刊>Journal of Materials Engineering and Performance >An Investigation of Strain Concentration in High-Strength Al-Zn-Mg-Cu Alloy 7085 Subjected to Tensile Deformation
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An Investigation of Strain Concentration in High-Strength Al-Zn-Mg-Cu Alloy 7085 Subjected to Tensile Deformation

机译：高强度Al-Zn-Mg-Cu合金7085拉伸变形时应变集中的研究

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摘要

The strain concentration factors were determined for aluminum alloy 7085 in the T7651 temper using multi-hole structural coupon specimens. Samples of the alloy were evaluated for both the 6.25 mm (0.25 in.) thick and 10 mm (0.4 in.) thick specimens having widths of 50 mm (2 in.) and 100 mm (4 in.), respectively. For the case of the specimens that were 50 mm in width, the mechanical tests were conducted for both the open-hole and filled-hole conditions and the corresponding strain concentration value was determined. For the filled-hole test specimens, threaded fasteners having collars were used. In order to provide for some interference, the fasteners had a shank diameter that was slightly larger than the nominal hole size. The strain concentration values were evaluated at both the failure strain (ε_f) and the strain at maximum load (ε_(max)). The average strain concentration value was then used to predict the results for the stack-up tests.
机译：使用多孔结构试样样本，确定T7651回火中铝合金7085的应变集中系数。对合金样品分别评估了厚度为6.25毫米（0.25英寸）和10毫米（0.4英寸）的样品，样品的宽度分别为50毫米（2英寸）和100毫米（4英寸）。对于宽度为50 mm的样品，在裸眼和实心条件下均进行了机械测试，并确定了相应的应变浓度值。对于填充孔的试样，使用具有轴环的螺纹紧固件。为了提供一些干扰，紧固件的柄直径略大于标称孔尺寸。分别在破坏应变（ε_f）和最大负荷应变（ε_（max））下评估应变浓度值。然后使用平均应变浓度值来预测堆积测试的结果。

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