The optimisation of shot peen forming processes

Wang, T.; Platts, MJ; Wu, Jie

doi:10.1016/j.jmatprotec.2007.12.019

Cited by 40 publications

(15 citation statements)

References 3 publications

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“…up to 50 m/s) frictionlessly and vertically on the target surface of a relatively large solid with isotropic strain-rate-insensitive elastic-plasticity. These assumptions are generally applicable to the practical operations of shot peening on aluminium alloy materials, which are discussed in detail in reference [3]. To study such a dynamic process of a single impact, an explicit dynamic finite element method is well suited.…”

Section: Two-dimensional Axisymmetric Single Impact Model With a Verymentioning

confidence: 99%

“…Although it is not strictly symmetric in reality, it is expected that this symmetric configuration may cause a small error because a large number of shot impacts are being modelled. Unlike that used by Wang and co-workers [3,10], a structured mesh is used with 3D continuum elements C3D8R. Although this eight-node hexahedral element requires a greater computational cost, it is more accurate than the four-node tetrahedral element.…”

Section: The Target Materialsmentioning

confidence: 99%

“…However, this equilibrium condition for an individual residual stress profile cannot be met under single or local multiple impact modelling because the local effect does not reach uniformity. An attempt has been made to address this gap [3,10] by simulating a large number of shot impacts, where the formation of a layered structure of plastic deformation and residual stresses was presented. However, the requirement of high computation resources limited the analysis, especially the residual stress profiles, to qualitative results.…”

Section: Introductionmentioning

confidence: 99%

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Multiple impact modelling for shot peening and peen forming

Kang

Wang²,

Platts

2009

Proceedings of the Institution of Mechanical Engineers, Part B:

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Impact modelling for shot peening or peen forming has progressed from simulating a single impact (or local multiple impacts) to simulating a large number of multiple impacts. It is the aim of this paper to provide quantitative results with a detailed finite element study, and to compare the effects of a single impact and global multiple impacts. Using a two-dimensional (2D) axisymmetric single impact model with a very fine mesh as reference, an appropriate three-dimensional (3D) mesh density for the target material is chosen by evaluating the 3D results against the axisymmetric results. A 3D explicit dynamic finite element analysis combined with a static springback analysis is then used to simulate a large number of steel shot impacts on an aluminium 2024-T351 target. The multiple impact modelling results indicate a clear difference of residual stress profiles between those obtained from single and multiple impact modelling. This difference is due to the global uniformity effects of shot peening, which involves numerous impacts. In addition, equivalent plastic strain obtained from the analysis is compared with microhardness test data on an experimental sample. Finally, the shot peen forming effect of multiple impacts is also evaluated by showing the macroscopic surface deformation. The comparison between single and multiple impact modelling results indicates that it is appropriate and important to model an appropriate coverage of multiple impacts for shot peening and peen forming at its various coverage.

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Section: Two-dimensional Axisymmetric Single Impact Model With a Verymentioning

confidence: 99%

Section: The Target Materialsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Multiple impact modelling for shot peening and peen forming

Kang

Wang²,

Platts

2009

Proceedings of the Institution of Mechanical Engineers, Part B:

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“…(1) is assumed to be distributed in a hemispherical cavity [13], the plastic depth h p produced from this contact pressure [14] can be given by:…”

Section: The Plastic Layer Assumptionmentioning

confidence: 99%

A process model for shot peen forming

Wang

Platts

Levers

2006

Journal of Materials Processing Technology

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“…Because the 3D SP models can show the effect of SP coverage rate on residual stress distribution, they are approaching to the practical work more and become the main choice in recent years, especially 3D models with dynamic analysis. In the overview of SP simulation, some 3D models are adopted with different model descriptions, kinds of material models, kinds of analysis, number of shot balls, and so on [8,[13][14][15][16][17][18][19][20]. On these 3D models, most studies focus on homogeneous material and few work involves 3D inhomogeneous inclusions while establishing models.…”

Section: Introductionmentioning

confidence: 99%

Finite Element Dynamic Analysis on Residual Stress Distribution of Titanium Alloy and Titanium Matrix Composite after Shot Peening Treatment

Xie¹,

Wang²,

Wang³

et al. 2018

Finite Element Method - Simulation, Numerical Analysis and Solution Techniques

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The residual stress distribution introduced by shot peening (SP) in the deformed surface layer of Ti-6Al-4V and (TiB+TiC)/Ti-6Al-4V were simulated and studied via the threedimensional (3D) finite element dynamic analysis and the experimental validation. The program of ANSYS/LS-DYNA was utilized, and the 3D homogeneous and inhomogeneous models were set up. The homogeneous model was established for simulating SP process on Ti-6Al-4V. The influence of three important parameters, the shot balls' size, shot velocity and coverage rate on residual stress distribution were investigated. Numerical simulation results showed that these parameters contributed different effects on SP treatment. Using a simplified method, an inhomogeneous model for simulating SP process on (TiB+TiC)/Ti-6Al-4V was set up. The max tensile and compressive residual stress (CRS) was +1155 and −1511 MPa, respectively. Based on this stress distribution, the beneficial effect of reinforcements was indicated during deformation, retarding the damage to the matrix and keeping the adverse tensile stresses in the reinforcements. In order to verify the results of simulation, the residual stress distribution along depth was measured by X-ray diffraction (XRD) method. The residual stress distribution by experiments was agreed with the simulated results, which verified the availability of 3D finite element dynamic analysis.

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The optimisation of shot peen forming processes

Cited by 40 publications

References 3 publications

Multiple impact modelling for shot peening and peen forming

Multiple impact modelling for shot peening and peen forming

A process model for shot peen forming

Finite Element Dynamic Analysis on Residual Stress Distribution of Titanium Alloy and Titanium Matrix Composite after Shot Peening Treatment

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