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Influence of additional axial stress on sheared edge quality in shearing process of aluminum sheets

机译:额外轴向应力对铝板剪切过程中剪切边缘质量的影响

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In order to improve sheared edge quality of aluminum sheets, shearing tests were conducted under various axial stresses at the shearing region, and the effect of the axial stress was investigated. Numerical simulations of the shearing process were carried out using a rigid plastic finite element simulation code developed by the authors. In the simulation, the Jeong expression was used as a fracture criterion of aluminum sheet. The distributions of fracture value and mean normal stress at the shearing region of the sheet were calculated. The experimental and simulation results showed that the rollover depth and fracture surface length decrease, but the burnish surface length increases with increasing additional axial compressive stress. When the axial compressive stress was applied, the mean normal stress becomes lower at the shearing region. Therefore, the fracture value was decreased, and the crack initiation was delayed. The experimental results were in good agreement with the simulation results.
机译:为了改善铝板的剪切边缘质量,在剪切区域的各种轴向应力下进行剪切试验,并研究了轴向应力的效果。使用作者开发的刚性塑料有限元模拟代码进行了剪切工艺的数值模拟。在模拟中,济孔表达用作铝板的断裂标准。计算裂缝值的分布和片材剪切区域的平均正常应力。实验和仿真结果表明,翻转深度和断裂表面长度降低,但燃烧的表面长度随着额外的轴向压缩应力而增加。当施加轴向压缩应力时,剪切区域的平均正常应力变低。因此,裂缝值降低,延迟裂纹引发。实验结果与模拟结果吻合良好。

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