Coupled finite and discrete element shot peening simulation based on Johnson–Cook material model

Ahmad, Abdulrahaman Shuaibu; Wu, Yiping; Gong, Hai

doi:10.1177/1464420720921211

Cited by 12 publications

(8 citation statements)

References 19 publications

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“…The Johnson-Cook model parameters for the AA 2219 determined in Ahmad etal. 29 are used in this work. The properties of the AA 2219 and SAE 1070 peening media, as well as the Johnson-Cook model parameters used in this work are presented in Table 1 and Table 2, respectively.…”

Section: Modeling Of the Post-weld Sp Process Using The Combined Dem-femmentioning

confidence: 99%

Numerical simulation of post-weld shot peening using combined discrete and finite element methods (DEM-FEM)

Ahmad

Gong

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part B:

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The numerical simulation of the post-weld shot peening (SP) process was performed to analyze the influence of various SP parameters on the final induced compressive residual stress (CRS). Firstly, the welding process was simulated based on the Finite Element Method (FEM) using ABAQUS CAE and FORTRAN user subroutine code, from which the initial welding-induced tensile residual stresses (TRS) were obtained. The FE model was validated using the results obtained from the TIG welding of the aluminum 2219 alloy (AA 2219) plate. Then, the post-weld SP process was numerically simulated using the combined discrete and finite element methods (DEM-FEM). The computed CRS from the simulation was compared with the experimentally measured outcome to validate the DEM-FEM model, and good agreement was observed from the compared results. Finally, the post-weld SP model was applied to extensively analyze the influence of the various SP parameters related to the peening media and target material on the final CRS.

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Section: Modeling Of the Post-weld Sp Process Using The Combined Dem-femmentioning

confidence: 99%

Numerical simulation of post-weld shot peening using combined discrete and finite element methods (DEM-FEM)

Ahmad

Gong

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part B:

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“…Although different shot peening process parameters may yield similar results, shot peening intensity and coverage were regarded as key parameters for the industry [8,9]. In the context of shot peening, coverage was defined as the percentage of the target surface area covered by indentations according to the SAE J2277 standard 2013 [10,11]. On the other hand, shot peening intensity was characterized by the Almen intensity [12].…”

Section: Introductionmentioning

confidence: 99%

“…Zhang et al [26] employed a DEM-FEM coupling simulation method to predict coverage, compressive residual stresses, and surface roughness resulting from shot peening. Ahmad et al [10] established a numerical simulation model that was experimentally validated to evaluate the impact of shot peening velocity, projectile size, and impact angle on residual stress. Marini et al [27] explored the potential of DEM-FEM simulation for edge shot peening processes, and the predicted residual stress fields were in good agreement with the experiments.…”

Section: Introductionmentioning

confidence: 99%

Study on Residual Stresses of 2219 Aluminum Alloy with TIG Welding and Its Reduction by Shot Peening

Zhang,

Chen,

Gong

et al. 2023

Metals

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Large residual stress of 2219 aluminum alloy induced by Tungsten Inert Gas (TIG) welding decreases its service performances. Shot peening was adopted to decrease the residual stress of TIG welding. Numerical models of TIG welding and shot peening were established using the combined discrete and finite element methods (DEM–FEM). The results show that TIG welding induces tensile residual stress due to the heat exchange effect and the longitudinal stress is larger than that in the transverse direction. The maximum tensile stress occurs at a depth of 0.1 mm. The surface tensile stress changes to compressive stress after shot peening as the severe deformation induced by the shots changes the stress state of the plate. The maximum value of compressive stress (σm) and the peened depth with compressive stress (Z0) are adopted to describe the peening effect. The absolute value of σm increases with the increased peening speed and nozzle height. Mixed shots with a diameter of 0.8 mm and 1.2 mm induce larger value of σm than those with only a diameter of 1.2 mm. The value of Z0 increases with the ascending shots diameter and nozzle height, while it varies nonmonotonically with the peening speed. The effect of shot peening on the residual stress in TIG welding is discussed.

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“…The results showed that the simulation results agreed well with the experimental results. Ahmad et al [19] investigated the effects of θ and v 0 on RS by DEM-FEM coupling method. The results showed that compressive RS increased with the increase of θ and v 0 .…”

Section: Introductionmentioning

confidence: 99%

DEM-FEM coupling analysis of shot′s energy distribution and target′s residual stress of pneumatic shot peening

Wu,

Shao,

et al. 2023

Mater. Res. Express

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Pneumatic shot peening is a widely used surface strengthening method. During the peening process, shots often collide with each other, resulting in large energy loss and small compressive residual stress. In order to achieve the optimum compressive residual stress with as little energy loss as possible, firstly the collision mechanism of shots and the forming and coupling mechanism of the target’s residual stress are revealed, and then pneumatic shot peening is simulated by using DEM-FEM coupling model. Then, the effects of impact angle θ, initial shot velocity v 0, shot diameter d p, and mass flow rate r m on the percentage η of shots with different ratios of the impact velocity to initial shot velocity v m/v 0, the energy loss (EL), the energy transferred from shots to the target (ET), the residual energy (ER) and the compressive residual stress (RS) are investigated. The results show that as many random shots successively impact the target, the RS field induced by each shot couples with some adjacent RS fields induced by other shots, so that disperse RS fields are gradually transformed into a continuous RS layer with the compressive RS in the surface and the tensile RS in the subsurface. With the increase of θ and r m and with the decrease of v 0 and d p, the collision probability of shots increases, so EL also increases and η of shots with a large v m/v 0 decreases. While, ET increases with the increase of v 0 and d p, decreases with the increase of r m, and first increases and then decreases with the increase of θ. ET does not entirely determine but greatly affects the compressive RS field. So, the surface compressive RS and the maximum compressive RS first increase and then decrease with the increase of θ and r m, while the two parameters increase with the increase of v 0 and d p. The optimum parameters of shots are θ = 75°, v 0 = 60 m s−1, d p = 0.25 mm and r m = 2 kg min−1, in which ET reaches 45%, the surface compressive RS of S11 and S33 reach 512 MPa and 510 MPa respectively, and the maximum compressive RS of S11 and S33 reach 665 MPa and 746 MPa respectively.

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Coupled finite and discrete element shot peening simulation based on Johnson–Cook material model

Cited by 12 publications

References 19 publications

Numerical simulation of post-weld shot peening using combined discrete and finite element methods (DEM-FEM)

Numerical simulation of post-weld shot peening using combined discrete and finite element methods (DEM-FEM)

Study on Residual Stresses of 2219 Aluminum Alloy with TIG Welding and Its Reduction by Shot Peening

DEM-FEM coupling analysis of shot′s energy distribution and target′s residual stress of pneumatic shot peening

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