An area-average approach to peening residual stress under multi-impacts using a three-dimensional symmetry-cell finite element model with plastic shots

Kim, Tae-Hyung; Lee, Jin Haeng; Lee, Hyungyil; Cheong, Seong Kyun

doi:10.1016/j.matdes.2009.07.032

Cited by 94 publications

(44 citation statements)

References 24 publications

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“…This average is representative of the homogeneous strain values generated by the USP process described in the former section. This hypothesis is supported by the area-averaged approach firstly developed by Menig et al (2001) and recently applied on a square pattern by Kim et al (2010) which indicated that the area-averaged solution is very close to the XRD solution.…”

Section: Averaging Processmentioning

confidence: 70%

Modelling of multiple impacts for the prediction of distortions and residual stresses induced by ultrasonic shot peening (USP)

Chaise

Nélias

et al. 2012

Journal of Materials Processing Technology

107

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International audienceDuring a manufacturing process, the ultrasonic shot peening (USP) technique can be used as the final surface treatment. The aim of this operation is to introduce surface compressive residual stresses in order to prevent crack propagation advancement. Although the numerical simulation method is able to predict the level of residual stresses in a peened part, the 3D modelling of the real USP process, in which many successive and shifted impacts take place, is very delicate to perform and costly in terms of computing time and memory space required. In this paper, a two step method based at first on the calculation of the averaged plastic strain tensor in a half-space by using a semi-analytical method and in a second time on the transfer of this plastic strain field to a finite element model is proposed in order to simulate the effects of the USP process in thin structures. The accuracy and advantages of the semi-analytical method are validated by a benchmark with several finite element codes. Experiments, similar to the Almen test, are performed on thin plates of Inconel 600. Numerical results in terms of distortions and residual stresses are compared with the experimental data

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Section: Averaging Processmentioning

confidence: 70%

Modelling of multiple impacts for the prediction of distortions and residual stresses induced by ultrasonic shot peening (USP)

Chaise

Nélias

et al. 2012

Journal of Materials Processing Technology

107

View full text Add to dashboard Cite

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“…Unlike the SPD process such as shot peening and deep rolling that only introduce compressive residual stress at the surface [19][20][21], ECAR causes the different surface residual stress as the stress at the bottom surface is tensile. Therefore this distribution has to be considered in applying the ECARed sheet in service condition or latter process.…”

Section: Resultsmentioning

confidence: 99%

Investigation of through thickness residual stress distribution in equal channel angular rolled Al 5083 alloy by layer removal technique and X-ray diffraction

2012

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The layer removal technique and the x-ray diffraction method have been employed to evaluate the residual stresses through the thickness of aluminium alloy 5083 processed by equal channel angular rolling (ECAR). ECAR is a severe plastic deformation process that introduces shear deformation to sheet metals. The process has been completed on 2 mm thick strips passed three times through die channels in a continuous manner. In this work, the profile of residual stresses was quantitatively determined. It was observed that after ECAR process, the residual stress magnitudes were changed from approximately zero in annealed condition up to half of the yield strength value of ECARed samples. The distribution of the residual stresses was found to be non-uniform through the thickness and the ECARed sample was compressive at the top surface while it was tensile at the bottom surface.2 Keywords: Non-ferros metals and alloys (A), X-ray analysis (G), Elastic behaviour (F).

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“…Consequently, we can consider a local area instead of the whole treated surface to calculate the residual strain and stress field in order to minimize the number of impacts simulated. Some researchers have used a rectangular pattern with four dimples produced by the impactors [7]. The local representative area chosen in this study consists in a triangle where the centers of three successive impacts are linked.…”

Section: Numerical Modelingmentioning

confidence: 99%

A numerical model to predict residual stresses induced by ultrasonic shot peening treatment of Inconel 600

Chaise

Nélias

et al. 2011

Surface Effects and Contact Mechanics X

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During a repair welding process, the ultrasonic shot peening (USP) process can be used as the final finishing step. The aim is to introduce compressive residual stresses on the surface of the welded area in order to prevent the occurrence of cracking. Although the numerical simulation method is able to predict the state of residual stress in the peened part, the 3D models of the real USP process, in which many successive and shifted impacts take place, is very delicate and costly in terms of computing time and memory space required. In this paper, we propose a method based first on the calculation of the averaged inelastic strain tensor in a local representative area, and second on the transfer of this inelastic strain field in order to simulate the USP process. Experiments, similar to the "Almen test", are performed on a thin plate of Inconel 600. Numerical results in terms of distortions and residual stresses are compared with the experimental data.

show abstract

An area-average approach to peening residual stress under multi-impacts using a three-dimensional symmetry-cell finite element model with plastic shots

Cited by 94 publications

References 24 publications

Modelling of multiple impacts for the prediction of distortions and residual stresses induced by ultrasonic shot peening (USP)

Modelling of multiple impacts for the prediction of distortions and residual stresses induced by ultrasonic shot peening (USP)

Investigation of through thickness residual stress distribution in equal channel angular rolled Al 5083 alloy by layer removal technique and X-ray diffraction

A numerical model to predict residual stresses induced by ultrasonic shot peening treatment of Inconel 600

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