Shot peening coverage effect on residual stress profile by FE random impact analysis

Ghasemi, Ali; Hassani-Gangaraj, S.M.; Mahmoudi, A.H.; Farrahi, G.H.; Guagliano, Mario

doi:10.1080/02670844.2016.1192336

Cited by 53 publications

(27 citation statements)

References 37 publications

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“…The correlation between fraction of critical damping, ζ i , and the damping factors α and β is: ζ i = α/2ω i + β ω i /2, with ω i being the natural frequency for a specific mode. According to Ghasemi [ 20 ] and Mequid [ 21 ], the value ζ = 0.5 has been selected for rapid damping of unwanted oscillations and to avoid any computational instability. Since the minimal modal frequency, ω 0 , is governing the oscillating behavior of the specimen after the impact, the damping parameters

and

should be selected, taking that mode into account, which can be estimated as: ω 0 = 1/h·√(2E/ρ), where E and ρ are the Young’s modulus and the density of the specimen material, respectively, and h is the height of the specimen.…”

Section: Finite Element Analysis Modelmentioning

confidence: 99%

A FEM-Based 2D Model for Simulation and Qualitative Assessment of Shot-Peening Processes

et al. 2021

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Shot peening is one of the most favored surface treatment processes mostly applied on large-scale engineering components to enhance their fatigue performance. Due to the stochastic nature and the mutual interactions of process parameters and the partially contradictory effects caused on the component’s surface (increase in residual stress, work-hardening, and increase in roughness), there is demand for capable and user-friendly simulation models to support the responsible engineers in developing optimal shot-peening processes. The present paper contains a user-friendly Finite Element Method-based 2D model covering all major process parameters. Its novelty and scientific breakthrough lie in its capability to consider various size distributions and elastoplastic material properties of the shots. Therewith, the model is capable to provide insight into the influence of every individual process parameter and their interactions. Despite certain restrictions arising from its 2D nature, the model can be accurately applied for qualitative or comparative studies and processes’ assessments to select the most promising one(s) for the further experimental investigations. The model is applied to a high-strength steel grade used for automotive leaf springs considering real shot size distributions. The results reveal that the increase in shot velocity and the impact angle increase the extent of the residual stresses but also the surface roughness. The usage of elastoplastic material properties for the shots has been proved crucial to obtain physically reasonable results regarding the component’s behavior.

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Section: Finite Element Analysis Modelmentioning

confidence: 99%

A FEM-Based 2D Model for Simulation and Qualitative Assessment of Shot-Peening Processes

et al. 2021

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“…10 The proper total depth for axisymmetric cell is proposed by several researchers as 4 times of the spherical striker radius, 26,27 while it considered up to 10 times by others. 10,[28][29][30] The analysis results with different velocity values revealed that the stress distribution does not affect the sample deeper than a region of 2R-4R (R ¼ ball radius) significantly. A combination of triangle and rectangle axisymmetric elements is used to model the target material so that the size graduation of the elements can be managed in smallest possible area.…”

Section: Fem Model Descriptionmentioning

confidence: 99%

A novel method for determination of surface treatment effect on mechanical properties of titanium bulk material

Bazzaz

Darvizeh

Alitavoli

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part C:

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Improving the mechanical properties of the material surface has been the main aim of the researchers for a long time. Utilizing of mechanical treatment procedures, such as direct impact, has been widely used for the bulk materials, but determination of the change in the mechanical properties of impacted material has not been exactly investigated. The main novelty of this paper is the determination of the effect of mechanical treatments on the mechanical properties of bulk materials. For this purpose, the new developed combined algorithm of modified dimensional analysis and minimum resultant error methods were emerged with FEA and experimental data. The finite element analysis (FEA) included the analysis of the impact with nanoindentation in a continued procedure to allow the investigation of the impact on the results of the nanoindentation. Previously, this trend had not been applied to analyze such phenomenon. The challenges of preparing a perfect analysis model to suit the nanoscale process (nanoindentation) and macro process (ball impact) were another investigation field of this research work. The result of this research was a complete calculation of the parameters of Johnson–Cook constants for titanium (Ti) bulk material including the most important strain rate coefficient (C). Comparison of Ti mechanical characteristics shows high improvement in yield stress (24%) against lower change in the elastic modulus (1.2%).

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“…The process modelling has therefore been widely studied in the literature, and it is now possible to model the shot‐peening of complex parts from the canon nozzle to the material's response. [ 4–8 ]…”

Section: Introductionmentioning

confidence: 99%

Controlled single and repeated impact testing for material plastic behaviour characterisation under high strain rates

Breumier

Trudeau-Lalonde²,

Lafrance³

et al. 2021

Strain

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Instrumented single‐shot experiments provide crucial information of a material's response to impact events that can be used in shot‐peening modelling. However, no authors successfully used such test for constitutive model identification and validation as existing test rig generally cannot provide an accurate determination of the shot trajectory in three dimensions over a wide velocity range. In this work, a shot‐peening test rig that can propel single shot under the process conditions with a high aiming accuracy is presented. The test rig propels industrial shot by sudden pressurised gas release. A methodology to recover the propelled shot three‐dimensional trajectory within a 200‐μm accuracy using two high‐frequency cameras is developed in an open‐source in‐house code. The test rig can propel 0.5‐, 1.19‐ and 2.5‐mm‐diameter shot at velocity ranging from 0.8 to 143 m s−1 and can send several shots at the same position when using the largest shot diameter. Two potential applications of the set‐up are presented for (i) coefficient of restitution measurement with different shooting angles and velocities and (ii) crystal plasticity finite element model validation using the impact dent topology, the shot displacement curve and the crystal misorientation field under the dent.

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Shot peening coverage effect on residual stress profile by FE random impact analysis

Cited by 53 publications

References 37 publications

A FEM-Based 2D Model for Simulation and Qualitative Assessment of Shot-Peening Processes

A FEM-Based 2D Model for Simulation and Qualitative Assessment of Shot-Peening Processes

A novel method for determination of surface treatment effect on mechanical properties of titanium bulk material

Controlled single and repeated impact testing for material plastic behaviour characterisation under high strain rates

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