Discrete element-periodic cell coupling model and investigations on shot stream expansion, Almen intensities and target materials

Tu, Fubin; Delbergue, Dorian; Klotz, T.; Bag, Amrita; Miao, Hengfeng; Bianchetti, C.; Brochu, Myriam; Bocher, Philippe; Lévesque, Martin

doi:10.1016/j.ijmecsci.2018.06.023

Cited by 16 publications

(4 citation statements)

References 32 publications

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“…SP has essential industrial applications [25][26][27], often used for strengthening the processing of highstrength materials [28], thus increasing residual surface stress. In order to investigate the effect of the SP process on surface morphology and residual stress, scholars have carried out a lot of research through finite element simulation of the SP process [29][30][31][32][33][34]. The coexistence of initial surface texture features and SP texture features in the final surface topography is a significant feature of SP [35].…”

Section: Introductionmentioning

confidence: 99%

Accurate superposition modeling method of grinding-shot peening surfaces

Chen,

Tang,

Shao

et al. 2024

Surf. Topogr.: Metrol. Prop.

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The coexistence of initial surface texture features and shot peening texture features in the final surface topography is a significant feature of shot peening. After the initial surface topography is strengthened by shot peening, the wave peak will produce more substantial deformation relative to the wave valley, which has not been considered in the existing superposition modeling methods. Taking the surface generated by the grinding-shot peening process as the research object, based on the feature extraction of measured topography, the concept of “Shot peening texture depth distribution surface” is put forward. And the texture depth distribution surface is theoretically used to optimize the characteristic baseline of shot peening processing in the proposed accurate superposition method. The measured grinding-shot peening surfaces verify the given method. It is found that the topographical and spatial features of the surfaces superimposed by this method are consistent with those of the measured surfaces, and the error of roughness parameters defined by ISO25178 is less than 8%.

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Section: Introductionmentioning

confidence: 99%

Accurate superposition modeling method of grinding-shot peening surfaces

Chen,

Tang,

Shao

et al. 2024

Surf. Topogr.: Metrol. Prop.

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“…Jebahi et al [24] developed a novel discrete-continuous coupling model and a cost-effective numerical simulation method. Tu et al [25] presented a finite element model based on sequentially coupled discrete element model (DEM) to predict residual stress and surface roughness after shot peening. Zhang et al [26] employed a DEM-FEM coupling simulation method to predict coverage, compressive residual stresses, and surface roughness resulting from shot peening.…”

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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“…During the strip test or general shot peening test, numerous shots are arbitrarily bumped onto the Almen strip or specimen surface in a random sequence and random locations [19][20][21]. Therefore, the peening coverage is difficult to define in FE simulation of shot peening.…”

Section: Introductionmentioning

confidence: 99%

Analysis of the Influence of High Peening Coverage on Almen Intensity and Residual Compressive Stress

Yang

Lee

et al. 2019

Applied Sciences

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The effectiveness of shot peening is mainly determined by the peening coverage. The peening coverage is required to be 100% for current technical standards of shot peening. With the increase of material strength, higher peening coverage is required in shot peening process. However, the influence of high peening coverage on Almen intensity and residual compressive stress is unclear, the difficulty mainly lies in the lack of quantitative description of peening coverage in finite element analysis. To analyze the influence of high peening coverage on Almen intensity and residual compressive stress, firstly an approximate quantitative description of peening coverage based on dent size, the distance of shots and shot numbers is proposed in this study. Based on this quantitative description of peening coverage, the arc height and residual stress of the Almen test are simulated with the finite element method. The simulation results of arc height and saturation curve agree well with that of the Almen test, by which the effectiveness of the quantitative description and FE simulation are proved. The further study indicates that in shot peening processes, the excessive peening coverage doesn't improve Almen intensity and residual compressive stress.

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Discrete element-periodic cell coupling model and investigations on shot stream expansion, Almen intensities and target materials

Cited by 16 publications

References 32 publications

Accurate superposition modeling method of grinding-shot peening surfaces

Accurate superposition modeling method of grinding-shot peening surfaces

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

Analysis of the Influence of High Peening Coverage on Almen Intensity and Residual Compressive Stress

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