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7075-T651铝合金喷丸工艺的仿真与试验研究

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  • 1. 湖南工业职业技术学院电气工程学院; 2. 中南林业科技大学机电工程学院
廖 凯(1977-), 博士,教授,主要从事铝合金薄壁件变形调控,电话:13975165819,E-mail: liaokai102@csuft.edu.cn

收稿日期: 2021-08-21

  修回日期: 2021-09-22

  录用日期: 2021-10-28

  网络出版日期: 2023-12-26

基金资助

国家自然科学基金(51475483);湖南省重点研发计划项目(2018NK2065)资助

Simulation and Experimental Research on Shot Peening Process of 7075-T651 Aluminum Alloy

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  • 1.College of Electrical Engineering, Hunan Industry Polytechnic, Changsha 410003, China;2.School of Mechanical and Electrical Engineering, Central South University of Forestry and Technology, Changsha 410004, China

Received date: 2021-08-21

  Revised date: 2021-09-22

  Accepted date: 2021-10-28

  Online published: 2023-12-26

摘要

为探究喷丸工艺参数对材料残余应力分布的影响,以7075-T651铝合金材料为研究对象,基于铝合金材料特性和试验条件,利用ANSYS/LS-DYNA建立喷丸有限元模型,获得了不同喷射距离、喷射压力和弹丸直径下残余应力的分布情况。结果表明:增大喷射压力和弹丸直径可以显著提高最大残余压应力和残余压应力影响深度,且喷射距离应保持在适当的范围内,最后将应力计算值和实测值进行对比,最大偏差为(10.0±12.5)MPa,偏差率不超过6.9%。分析认为通过有限元模型能够准确地获得残余应力的分布情况,有助于开展喷丸工艺参数对残余应力分布规律的影响研究。

本文引用格式

刘德玉, 陈家伟, 刘曹文, 廖凯 . 7075-T651铝合金喷丸工艺的仿真与试验研究[J]. 材料保护, 2022 , 55(2) : 99 -104 . DOI: 10.16577/j.issn.1001-1560.2022.0045

Abstract

In order to explore the effect of shot peening(SP)process parameters on the residual stress distribution of the material, the shot peening finite element model(FEM)was established base on the characteristics of the aluminum alloy material and the experimental conditions by ANSYS/LS-DYNA, in which the 7075-T651 aluminum alloy material was taken as a sample.The distribution of residual stress under different jet distances, jet pressures and projectile diameters was obtained by the FEM model.Results showed that increasing the jet pressure and projectile diameters could significantly increase the maximum residual compressive stress and the influence depth of residual compressive stress, and the jet distance should be kept within an appropriate range.Finally, the calculated stress value was compared with the experimental stress value, the maximum deviation was(10.0±12.5)MPa, and the deviation rate did not exceed 6.9%.Therefore, the work indicated that the distribution of residual stress could be accurately obtained through the FEM, which was helpful for the study of the influence of shot peening process parameters on the distribution law of residual stress.
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