The effect of material cyclic deformation properties on residual stress generation by laser shock processing

I. Angulo, F. Cordovilla, A. García-Beltrán, N. S. Smyth, K. Langer, M. E. Fitzpatrick, J. L. Ocaña

    Research output: Contribution to journalArticle

    5 Citations (Scopus)
    16 Downloads (Pure)

    Abstract

    Laser shock processing (LSP) is a mechanical surface treatment to induce a compressive residual stress state into the near surface region of a metallic component. The effect of the cyclic deformation properties of ductile materials on the final residual stress fields obtained by LSP is analysed. Conventional modelling approaches either use simple tensile yield criteria, or isotropic hardening models if cyclic straining response is considered for the material during the peen processing. In LSP, the material is likely to be subject to cyclic loading because of reverse yielding after the initial plastic deformation. The combination of experiment and modelling shows that the incorporation of experimentally-determined cyclic stress-strain data, including mechanical hysteresis, into material deformation models is required to correctly reflect the cyclic deformation processes during LSP treatment and obtain accurate predictions of the induced residual stresses.

    Original languageEnglish
    Pages (from-to)370-381
    Number of pages12
    JournalInternational Journal of Mechanical Sciences
    Volume156
    Early online date28 Mar 2019
    DOIs
    Publication statusPublished - 1 Jun 2019

    Bibliographical note

    NOTICE: this is the author’s version of a work that was accepted for publication in International Journal of Mechanical Sciences. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in International Journal of Mechanical Sciences, [156], (2019) DOI: 10.1016/j.ijmecsci.2019.03.029

    © 2019, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/

    Keywords

    • Cyclic hardening
    • Finite element analysis
    • Laser shock processing
    • Residual stress
    • Shock waves

    ASJC Scopus subject areas

    • Civil and Structural Engineering
    • Materials Science(all)
    • Condensed Matter Physics
    • Mechanics of Materials
    • Mechanical Engineering

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