3-D FEM simulation of laser shock processing

Hu, Yongxiang; Yao, Zhenqiang; Hu, Jun

doi:10.1016/j.surfcoat.2006.02.018

Cited by 137 publications

(73 citation statements)

References 14 publications

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“…The C value was estimated by checking the elastic precursor (=P H ) value with a VISAR interferometer system [15].…”

Section: Visar Determination Of Impact Pressures and Elastic Precursorsmentioning

confidence: 99%

“…In most of recent FEM analysis procedures of LSP [11,13,15], two distinct steps were considered to obtain an absolutely stable residual stress field: (1) a dynamic explicit analysis to investigate shock wave propagation and (2) a static analysis using an implicit algorithm to calculate residual stress fields. In our case, a single explicit dynamic calculation was selected to estimate directly a quasiresidual stress field, for a large number of impact loadings.…”

Section: Description Of the Numerical Modelmentioning

confidence: 99%

“…Some of these simulations have shown a close match with experimentally measured residual stresses. A recent work has also developed a three-dimensional FEM model to simulate a metal subjected to a square laser spot [15] using the ANSYS code. Last, we can mention the recent work by Hirano [16] who has demonstrated for the first time analytically, that residual stresses induced by LSP could be anisotropic.…”

Section: Introductionmentioning

confidence: 99%

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Finite element analysis of laser shock peening of 2050-T8 aluminum alloy

Hfaiedh

Peyre

Song

et al. 2015

International Journal of Fatigue

145

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Laser shock processing is a recently developed surface treatment designed to improve the mechanical properties and fatigue performance of materials, by inducing a deep compressive residual stress field. The purpose of this work is to investigate the residual stress distribution induced by laser shock processing in a 2050-T8 aeronautical aluminium alloy with both X-ray diffraction measurements and 3D finite element simulation. The method of X-ray diffraction is extensively used to characterize the crystallographic texture and the residual stress crystalline materials at different scales (macroscopic, mesoscopic and microscopic).Shock loading and materials’ dynamic response are experimentally analysed using Doppler velocimetry in order to use adequate data for the simulation. Then systematic experience versus simulation comparisons are addressed, considering first a single impact loading, and in a second step the laser shock processing treatment of an extended area, with a specific focus on impact overlap. Experimental and numerical results indicate a residual stress anisotropy, and a better surface stress homogeneity with an increase of impact overlap.A correct agreement is globally shown between experimental and simulated residual stress values, even if simulations provide us with local stress values whereas X-ray diffraction determinations give averaged residual stresses.International audienceLaser shock processing is a recently developed surface treatment designed to improve the mechanical properties and fatigue performance of materials, by inducing a deep compressive residual stress field. The purpose of this work is to investigate the residual stress distribution induced by laser shock processing in a 2050-T8 aeronautical aluminium alloy with both X-ray diffraction measurements and 3D finite element simulation. The method of X-ray diffraction is extensively used to characterize the crystallographic texture and the residual stress crystalline materials at different scales (macroscopic, mesoscopic and microscopic).Shock loading and materials’ dynamic response are experimentally analysed using Doppler velocimetry in order to use adequate data for the simulation. Then systematic experience versus simulation comparisons are addressed, considering first a single impact loading, and in a second step the laser shock processing treatment of an extended area, with a specific focus on impact overlap. Experimental and numerical results indicate a residual stress anisotropy, and a better surface stress homogeneity with an increase of impact overlap.A correct agreement is globally shown between experimental and simulated residual stress values, even if simulations provide us with local stress values whereas X-ray diffraction determinations give averaged residual stresses

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“…The C value was estimated by checking the elastic precursor (=P H ) value with a VISAR interferometer system [15].…”

Section: Visar Determination Of Impact Pressures and Elastic Precursorsmentioning

confidence: 99%

Section: Description Of the Numerical Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Finite element analysis of laser shock peening of 2050-T8 aluminum alloy

Hfaiedh

Peyre

Song

et al. 2015

International Journal of Fatigue

145

View full text Add to dashboard Cite

show abstract

“…The LS-DYNA code has been validated by Hu et al 39 to simulate the LSP process. The applied pressure at each loading step was calculated with the analytical method in Sec.…”

Section: B Simulationsmentioning

confidence: 99%

Shock pressure induced by glass-confined laser shock peening: Experiments, modeling and simulation

Zhang

Song

et al. 2011

Journal of Applied Physics

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Infrared thermometry and interferential microscopy for analysis of crater formation at the surface of fused silica under CO2 laser irradiation J. Appl. Phys. 111, 063106 (2012) The interaction of 193-nm excimer laser irradiation with single-crystal zinc oxide: Positive ion emission J. Appl. Phys. 111, 063101 (2012) Laser produced streams of Ge ions accelerated and optimized in the electric fields for implantation into SiO2 substrates Rev. Sci. Instrum. 83, 02B305 (2012) Formation of metallic colloids in CaF2 by intense ultraviolet light Appl. Phys. Lett. 99, 261909 (2011) Study on characteristic parameters influencing laser-induced damage threshold of KH2PO4 crystal surface machined by single point diamond turning J. Appl. Phys. 110, 113103 (2011) Additional information on J. Appl. Phys. The shock pressure generated by the glass confined regime in laser shock peening and its attenuation in the target material are investigated. First, the particle velocity of the target back free surface induced by laser generated shock pressure of this regime is measured using a photonic Doppler velocimetry system. The temporal profile of the particle velocity at the back free surface, where the elastic precursor is captured, manifests a powerful diagnostic capability of this newly developed photonic Doppler velocimetry system for tracking the velocity on short time scales in shock-wave experiments. Second, a coupling pressure analytical model, in which the material constitutive models of confined layers and target material are considered, is proposed to predict the plasma pressure profile at the surface of target. Furthermore, using the predicted shock pressure profile as the input condition, the dynamic response of the target under the shock pressure is simulated by LS-DYNA. The simulated back free surface velocity profile agrees well with that measured by the photonic Doppler velocimetry system. Finally, the attenuation behavior of stress waves and particle velocities in the depth of the target is analyzed, and it indicates an exponential decay. The corresponding empirical formulas for the attenuation behavior are given based on the numerical results.

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“…There are no free [6] to investigate the mechanical behavior and to predict the residual stresses from the laser shocked materials. From then on, several researchers have adopted FEM tool to simulate the laser-generated shock waves propagating into different metal materials [4,[6][7][8][9][10][11]. Surface pressure load is often applied with the shock pressure profile from experimental measurements or the confined plasma model.…”

Section: Introductionmentioning

confidence: 99%

3-D FEM simulation of laser shock processing

Cited by 137 publications

References 14 publications

Finite element analysis of laser shock peening of 2050-T8 aluminum alloy

Finite element analysis of laser shock peening of 2050-T8 aluminum alloy

Shock pressure induced by glass-confined laser shock peening: Experiments, modeling and simulation

Numerical simulation and experimentation of overlapping laser shock processing with symmetry cell

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