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Abstract：
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In order to control the residual stress on the surface of nut to prevent the nut from cracking and damage, the influence laws of different parameters of three necking processes, such as necking depth, necking speed and fillet radius of necking disk on the residual stress distribution on the surface of nut were analyzed by finite element analysis software ABAQUS，and the accuracy of finite element simulation results was verified by comparing the experimental results with the simulation results. The results show that the cylindrical part of nut exhibits residual compressive stress, the arc part is residual tensile stress, and the residual stress in the axial direction (S22 direction) is the largest. Furthermore, the residual stress distribution on the surface of nut shows the same trend with the change of necking depth and necking speed, and the fillet radius of necking disk has a great influence on the residual stress concentration on the surface of nut. Finally, the experimental results show that the they are consistent with the trend predicted by the finite element simulation, and the deviation is small.
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Funds：
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江苏省自然科学基金资助项目（BK20170788）
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AuthorIntro：
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随磊（1991-），男，硕士，助理工程师，E-mail：461945829@qq.com；通讯作者：王建华（1994-），男，硕士研究生，E-mail：nuaa_wjh@163.com
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Reference：
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