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The biaxial stress-strain curves of sheet metals

机译：钣金件的双轴应力-应变曲线

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Biaxial tensile tests of 5754O aluminum alloy sheet and B170P1 steel sheet were performed under linear loading paths with cruciform specimens and a biaxial loading testing machine.The stress-strain curves under different loading paths were obtained.It is found that the loading path has a significant influence on the stress-strain curves,i.e.,the stress-strain curves vary with the loading path.The stress-strain curves in the rolling direction become higher with the decrease of the loading ratio (the ratio of the load along the rolling direction to that along the transverse direction) from 4:0 to 4:4.Meanwhile the stress-strain curves in the transverse direction become lower with the decrease of the loading ratio from 4:4 to 0:4.Based on Yld2000-2d yield criterion,the experimental phenomena of the two kinds of sheet metals under biaxial tension were explained theoretically.
机译：对5754O铝合金薄板和B170P1钢板在十字形试件和双轴加载试验机的线性加载路径下进行了双轴拉伸试验，得出了不同加载路径下的应力-应变曲线，发现加载路径具有显着性。对应力-应变曲线的影响，即应力-应变曲线随载荷路径的变化而变化。随着载荷比的减小，轧制方向上的应力-应变曲线变高（载荷沿轧制方向的比与载荷比之比）减小。沿横向方向的应力应变曲线从4：0到4：4。同时，随着载荷比从4：4降低到0：4，横向应力-应变曲线变低。基于Yld2000-2d屈服准则从理论上解释了两种薄板在双轴拉伸下的实验现象。

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