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在板料液压成形过程中,由于流体压力的施加,对板材的受力状态会产生不同程度的影响,同时可以在一定范围内有效提高板材的成形性能。为了分析流体压力下板材成形性能的变化规律,基于有限元软件模拟软件ABAQUS,对不同流体压力条件下的2024铝合金的单向拉伸过程分别进行数值模拟研究,得出了流体压力对板材米塞斯应力分布、轴向应力分布、伸长率及颈缩区厚度的影响规律。研究结果表明,在流体压力作用下,板材的变形更加均匀;并随着流体压力的增大,板材表现出更大的变形潜力,可以达到更大的伸长量。
In the sheet metal hydroforming process, due to the application of fluid pressure on the plate will have varying degrees of stress state, at the same time can be effectively within a certain range of sheet forming performance. In order to analyze the variation regularity of sheet formability under fluid pressure, the numerical simulation study of uniaxial tension of 2024 aluminum alloy under different fluid pressures was carried out based on the finite element software ABAQUS. The effects of fluid pressure on sheet metal Seth stress distribution, axial stress distribution, elongation and necking zone thickness of the law. The results show that the plate deformation is more uniform under the fluid pressure. With the increase of fluid pressure, the plate shows greater deformation potential and can achieve greater elongation.