Residual stress behaviors induced by laser peening along the edge of curved models

Im, Jong-Bin; Grandhi, Ramana V.; Ro, Younghee

doi:10.1007/s12206-012-0913-6

Cited by 10 publications

(2 citation statements)

References 19 publications

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“…In recent years, there are reports about the influence of edge effect on laser shot peening, but the study mainly focuses on holes. Im et al [3] studied the residual stress distribution of three curved models that have different curvatures. The results show that the compressive residual stress in the edge region is relatively small.…”

Section: Introductionmentioning

confidence: 99%

Research on the edge effect of 7075 aluminium alloy damaged aircraft component strengthened by laser shock peening

Cheng

Zhang

Cheng

et al. 2022

IOP Conf. Ser.: Mater. Sci. Eng.

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Laser shock peening (LSP) is a promising surface strengthening process in the field of aircraft maintenance. However, unreasonable residual stress distribution often exists at the edge of the damaged aircraft component strengthened by LSP, which results in a significant decrease in strengthening effect of LSP. To explore the residual stress distribution after LSP in the edge region of components and reveal the influence of edge effects on deformation and inducing residual stress, the finite element (FE) models of LSP on 7075 aluminum alloy was established based on ABAQUS. The reliability of the FE model was verified by comparing the experiment and simulation results. The residual stress distribution in the edge and center region after LSP were analyzed. The results show that the edge effect enhances the flow of material to the edge and introduces tensile stress in this direction, thereby reducing the overall residual compressive stress level in the edge region. The influence range of edge effect on residual stress distribution is about 70% of the laser spot diameter. Besides, edge effects reinforce the phenomenon of residual stress holes, which results in a reduction of the maximum value by 109.2MPa. The influence of edge effect can be solved by multi surfaces LSP.

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Section: Introductionmentioning

confidence: 99%

Research on the edge effect of 7075 aluminium alloy damaged aircraft component strengthened by laser shock peening

Cheng

Zhang

Cheng

et al. 2022

IOP Conf. Ser.: Mater. Sci. Eng.

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“…Results of a rotary bending fatigue test show that shot-peening suppressed not only much of the surface-originated fracture but also the scattering error of the probabilistic stress-life data, and improve the fatigue life by about six times through the load levels of the cyclic tests. Im et al [2] use laser peening (LP) in order to induce high-magnitude compressive residual stresses in a small region of a mechanical component. The compressive residual stresses cause plastic deformation that is resistant to fatigue fracture.…”

Section: Introductionmentioning

confidence: 99%

Effect of the indentation process on fatigue life of drilled specimens

et al. 2015

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Design and manufacture of mechanical elements are strongly influenced by the evaluation of the residual stresses due to their effects on the material strength. This paper presents numerical and experimental results performed on AW 6082-T6 aluminum alloy drilled specimens when the hole is created after a bilateral indentation process. The plastic deformation induced by the indenters creates a compressive residual stress field around the hole, which persists after the drilling operation. Several numerical analysis have been carried out in ANSYS APDL explicit solver for different indentation depths and hole diameters in order to evaluate the compressive circumferential stresses, optimal process parameters and relevant geometric features. Fatigue tests are performed in order to determine the cycles to failure and the corresponding Wöhler diagram

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Critical analysis of processes and apparatus for industrial surface peening technologies

Külekçi

Eşme

2014

Int J Adv Manuf Technol

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Residual stress behaviors induced by laser peening along the edge of curved models

Cited by 10 publications

References 19 publications

Research on the edge effect of 7075 aluminium alloy damaged aircraft component strengthened by laser shock peening

Research on the edge effect of 7075 aluminium alloy damaged aircraft component strengthened by laser shock peening

Effect of the indentation process on fatigue life of drilled specimens

Critical analysis of processes and apparatus for industrial surface peening technologies

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