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    Simulating shot peening based on a dislocation density-based model with a novel time integration algorithm

    Access Status
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    Authors
    Ren, F.H.
    Zhao, M.H.
    Lu, Chunsheng
    Zhang, J.W.
    Wang, B.B.
    Date
    2024
    Type
    Journal Article
    
    Metadata
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    Citation
    Ren, F.H. and Zhao, M.H. and Lu, C. and Zhang, J.W. and Wang, B.B. 2024. Simulating shot peening based on a dislocation density-based model with a novel time integration algorithm. International Journal of Solids and Structures. 295: 112823.
    Source Title
    International Journal of Solids and Structures
    DOI
    10.1016/j.ijsolstr.2024.112823
    ISSN
    0020-7683
    Faculty
    Faculty of Science and Engineering
    School
    School of Civil and Mechanical Engineering
    URI
    http://hdl.handle.net/20.500.11937/94983
    Collection
    • Curtin Research Publications
    Abstract

    Shot peening has been widely used in processing various components since it can bring in residual compressive stress and effectively refine the grain size of impacted area. To simulate grain refinement induced by shot peening, the dislocation density-based model has recently been introduced, however, the existing time integration algorithm is not stable and usually leads to divergent solutions in iterations. In this paper, a novel time integration algorithm is proposed for the dislocation density-based model. Based upon the algorithm, numerical studies on multi-shot AISI4340 steel are carried out with different coverages, velocities, shot diameters, and peening angles. It is shown that the method converges faster than the two-level iteration method, and the predicted dislocation cell structure sizes after shooting are consistent with experimental results. Besides that, increasing coverage can refine the size of a dislocation cell, which is closely dependent on the shot diameter, impact velocity, and angle. Thus, to achieve the desired grain size or the depth of refinement, it is necessary to take the shot diameter and velocity into account simultaneously.

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