Tension–compression asymmetry of phosphor bronze for electronic parts and its effect on bending behavior
Tension–compression asymmetry of phosphor bronze for electronic parts and its effect on bending behavior
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DOI：
10.1016/j.ijplas.2009.01.004
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发表时间：
2009-09
影响因子：
9.8
通讯作者：
T. Kuwabara;Y. Kumano;J. Ziegelheim;Ikuya Kurosaki
中科院分区：
文献类型：
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作者：
T. Kuwabara;Y. Kumano;J. Ziegelheim;Ikuya Kurosaki
采用专门设计的测试装置对铜合金板（磷青铜）和6000系列铝合金板（AA6016-T4）进行面内拉伸和压缩实验。该设备配备了梳型模具，因此可以在不屈曲的情况下测量片状样品在拉伸和压缩下的应力-应变曲线，反之亦然，以及单调拉伸和压缩的应力-应变曲线。对于原始铜合金，观察到拉伸和压缩之间的流动应力存在差异，但对于铝合金则没有。此外，还进行了应力反转测试，例如拉伸后压缩和压缩后拉伸，以测量包辛格效应。在实验的第二部分中，测量了原始样品和预拉伸样品的弯矩-曲率图。将弯矩-曲率图与使用拉伸-压缩试验获得的应力-应变曲线计算的结果进行比较，并且与使用拉伸-压缩不对称性和正确再现包辛格效应计算的结果非常一致。
In-plane tension and compression experiments on copper alloy sheets (phosphor bronze) and 6000 series aluminum alloy sheets (AA6016-T4) were conducted using a specially designed testing apparatus. The apparatus is equipped with comb-type dies so that stress–strain curves of a sheet specimen subjected to tension followed by compression, and vice versa, can be measured without buckling of the specimen, as well as those for monotonic tension and compression. A difference was observed in the flow stresses between tension and compression for the as-received copper alloy, but not for the aluminum alloy. Moreover, stress reversal tests, such as tension followed by compression and compression followed by tension, were carried out in order to measure the Bauschinger effect. In the second part of the experiment, bending moment–curvature diagrams were measured for the as-received and pre-stretched specimens. The bending moment–curvature diagrams were compared with those calculated using the stress–strain curves obtained from the tension–compression tests, and were in good agreement with those calculated with the tension–compression asymmetry and the Bauschinger effect correctly reproduced.