Numerical Simulation and Experimental Study of Shot Peening on Rough Surface based on FEM-DEM

Mingming Deng; Guixi Peng; Ming Zheng; Changjiang Zhou

doi:10.16578/j.issn.1004.2539.2021.07.023

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Numerical Simulation and Experimental Study of Shot Peening on Rough Surface based on FEM-DEM

Development·Application | 更新时间：2022-11-10

- Numerical Simulation and Experimental Study of Shot Peening on Rough Surface based on FEM-DEM
- Journal of Mechanical Transmission Vol. 45, Issue 7, Pages: 156-160(2021)
- 作者机构：
  
  1.中国航发中传机械有限公司，湖南长沙 410200
  2.湖南大学汽车车身先进设计制造国家重点实验室，湖南长沙 410082
- 作者简介：
- 基金信息：
- DOI：10.16578/j.issn.1004.2539.2021.07.023
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邓明明,彭归浠,郑明等.基于FEM-DEM的粗糙表面喷丸数值模拟与试验研究[J].机械传动,2021,45(07):156-160.

Deng Mingming,Peng Guixi,Zheng Ming,et al.Numerical Simulation and Experimental Study of Shot Peening on Rough Surface based on FEM-DEM[J].Journal of Mechanical Transmission,2021,45(07):156-160.
邓明明,彭归浠,郑明等.基于FEM-DEM的粗糙表面喷丸数值模拟与试验研究[J].机械传动,2021,45(07):156-160. DOI： 10.16578/j.issn.1004.2539.2021.07.023.

Deng Mingming,Peng Guixi,Zheng Ming,et al.Numerical Simulation and Experimental Study of Shot Peening on Rough Surface based on FEM-DEM[J].Journal of Mechanical Transmission,2021,45(07):156-160. DOI： 10.16578/j.issn.1004.2539.2021.07.023.

摘要

考虑试件喷丸前粗糙度的影响，提出了粗糙表面喷丸的有限元与离散元（FEM-DEM）耦合模型。制备喷丸与未喷丸两类45#钢试件，测量了试件喷丸前后表面与亚表面的残余应力。根据测量结果验证耦合模型，研究了喷丸工艺参数对试件亚表面残余应力的影响规律。结果表明，提高表面覆盖率和喷丸强度，均可增大残余压应力峰值，其中，喷丸强度的影响更为显著；相同表面覆盖率和喷丸强度下，小直径弹丸可增大残余压应力峰值，大直径弹丸则有利于增大残余压应力层厚；若喷丸前试件粗糙度过大，可通过提高表面覆盖率来增强喷丸强化效果。研究为粗糙表面喷丸强化工艺优化提供了一定的理论依据。

Abstract

A finite element and discrete element （FEM-DEM） coupling model for shot peening on rough surface is proposed in consideration of the surface roughness of non-peened specimen. The peened and non-peened 45# steel specimens are prepared，and their residual stress on the surface and subsurface are measured. The measured results are used to verify the proposed model，and the effects of shot peening process parameters on the residual stress on the subsurface are studied. The results show that increasing the surface coverage and shot peening intensity can increase the peak value of the compressive residual stress，especially the impact of shot peening is more significant. With the same surface coverage and shot peening intensity，the smaller diameter shot can increase the peak value of the compressive residual stress，while the thickness of the compressive residual stress increases as the diameter of shot becomes larger. If the surface roughness before shot peening is too high，the effect of shot peening can be enhanced by increasing the surface coverage. The research provides a certain theoretical basis for the optimization of shot peening on the rough surface.

关键词

粗糙表面喷丸强化有限元与离散元残余应力

Keywords

Rough surfaceShot peeningFEM-DEMResidual stress

references

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