Abstract To obtain the stress states of the sheet metal and understand the potential forming mechanism under the influences of fluid pressure and temperature during the warm hydroforming of 5A06-O aluminum alloy sheets, mechanics analysis was conducted for the warm hydromechanical deep drawing of a cylindrical cup, taking into account through-thickness normal stress induced by fluid pressure. By considering the additional stress during bending using a variable-stiffness pure bending model as equal to that determined using a bending moment model, the additional stress at the die corner during bending was solved. The force equilibrium equations for the cup near the die corner, which were classified by whether the blank contacted the die, were also established and the results were in good agreement with those obtained via the finite element method. Furthermore, mechanics analysis was also performed for the straight-wall region, and the results revealed that the error was slightly greater when the liquid pressure was used to approximately equal to through-thickness normal stress because the ratio of thickness to radius was not sufficiently large.

中文翻译：

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铝合金圆柱杯温板流体力学拉深力学分析

摘要 为获得5A06-O铝合金板温液压成形过程中板料的应力状态，了解流体压力和温度影响下的潜在成形机理，对圆柱杯温液压深冲进行了力学分析。 ，考虑到流体压力引起的全厚度法向应力。通过将使用可变刚度纯弯曲模型的弯曲过程中的附加应力与使用弯矩模型确定的相同，解决了弯曲过程中模具拐角处的附加应力。还建立了以毛坯是否接触模具为分类的靠近模具角部的杯子的力平衡方程，其结果与通过有限元方法获得的结果吻合良好。