Experimentally validated multi-step simulation strategy to predict the fatigue crack propagation rate in residual stress fields after laser shock peening

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Laser shock peening (LSP) is a promising technology to retard the fatigue crack propagation (FCP) in metallic lightweight structures. A multi-step simulation strategy to predict FCP in LSP-induced residual stress fields is proposed and applied. The simulation strategy involves an LSP process simulation, a transfer approach to include the plastic strains in a C(T) specimen model to calculate the residual stresses and an FCP simulation to determine the stress intensity factors. The FCP rate is finally determined via FCP equations. The validity of the simulation strategy including the crack driving quantities prediction is experimentally demonstrated by a novel ‘simulation’ approach.

Original languageEnglish
JournalInternational Journal of Fatigue
Volume124
Pages (from-to)265-276
Number of pages12
ISSN0142-1123
DOIs
Publication statusPublished - 01.07.2019

    Research areas

  • Engineering - Fatigue crack growth, Laser shock peening, Numerical simulation, Residual stresses, Stress intensity factor

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