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A design for lumped mass of a shot model in random peening simulation and prediction of dimple size evolution

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Abstract

Finite element (FE) simulations are commonly used to investigate shot peening effects by implementing the impact process of multiple shots upon a target which with small geometry size. The target is selected with small size from the practical large component to economize the computational resources in simulation. Under this condition, the lumped mass of each shot in FE simulation should be designed according to its impact position on the target to balance the influence of boundary constraints. Aiming to obtain the same indenting depth of a shot impacting at any position, the evolutions of indenting depth and related energies are studied. An approach is proposed based on the strains and stresses of an impact on semi-infinite body to design the lumped mass of shot on various shape targets. With the proposed approach, a random peening process involving 300 impacts is simulated to detect the size evolution of dimples, which is useful for determining peening coverage precisely. The random peening simulation presents a decrease of average dimple size with impact density. And regular multiple-impact simulations present the same trend, indicating the capability of multiple-impact analyses on the prediction of dimple size evolution. The simulation results are verified by shot peening experiments.

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Acknowledgements

The authors would like to acknowledge the support for this research work from National Natural Science Foundation of China (Grant No. 51805432), China Postdoctoral Science Foundation (Grant No. 2018M633541), Natural Science Basic Research Plan in Shaanxi Province of China (Grant No. 2018JQ5084), and Natural Science Foundation of Shaanxi Provincial Department of Education (Grant No. 18JK0571).

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Authors and Affiliations

  1. School of Mechanical and Instrument Engineering, Xi’an University of Technology, 5 South Jinhua Road, Xi’an, 710048, Shaanxi, China

    Xudong Xiao, Yao Sun, Renfeng Zhao, Mingshun Yang & Yan Li

  2. Key Laboratory of NC Machine Tools and Integrated Manufacturing Equipment of the Education Ministry & Key Laboratory of Manufacturing Equipment of Shaanxi Province, Xi’an, 710048, Shaanxi, China

    Xudong Xiao

  3. Xi’an Aircraft International Corporation, Xi’an, 710089, Shaanxi, China

    Guoqiang Gao

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  1. Xudong Xiao
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  2. Yao Sun
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  3. Renfeng Zhao
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  4. Mingshun Yang
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  5. Guoqiang Gao
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  6. Yan Li
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Correspondence to Xudong Xiao.

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Xiao, X., Sun, Y., Zhao, R. et al. A design for lumped mass of a shot model in random peening simulation and prediction of dimple size evolution. Int J Adv Manuf Technol 103, 4597–4608 (2019). https://doi.org/10.1007/s00170-019-03581-w

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  • DOI: https://doi.org/10.1007/s00170-019-03581-w

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