In calculating, power hardening function is used as the true stress - strain curve of materials.

计算时, 板料的真实应力 - 应变曲线拟合为幂强化函数型.

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True stress and contraction ratio of the minimum section increases as flow tensile stress decreases.

随着流动拉应力的降低,颈缩区域中部的真应力持续增加.

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