Sheet metal forming in the case of hinge manufacturing process. Part 2: Numerical study

Yangui, Wissal; Ktari, Ahmed; Gammoudi, Mouna; Guermazi, Noamen; Elleuch, Khaled

doi:10.1007/s00170-017-1194-0

Cited by 4 publications

(1 citation statement)

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“…However, the effect of the friction on plastic strain and residual stresses and its correlation with mechanics involved in hydroforming is not well studied. The residual stresses' prediction generated on hydroformed tube seems to be very important since they can influence the result of a later process step 17 and can affect the structure lifetime in service. 18 As a result, the present paper aims to study the effect of the COF and relative die-tube slip distribution on the tube thinning and residual stresses distribution, and investigate the relationship between the plastic flow and the die-tube contact condition during the studied THF process.…”

Section: Introductionmentioning

confidence: 99%

Numerical investigation of plastic flow and residual stresses generated in hydroformed tubes

Ktari

Abdelkefi

Guermazi

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part L:

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During tube hydroforming process, the friction conditions between the tube and the die have a great importance on the material plastic flow and the distribution of residual stresses of the final component. Indeed, a three-dimensional finite element model of a tube hydroforming process in the case of square section die has been performed, using dynamic and static approaches, to study the effect of the friction conditions on both plastic flow and residual stresses induced by the process. First, a comparative study between numerical and experimental results has been carried out to validate the finite element model. After that, various coefficients of friction were considered to study their effect on the thinning phenomenon and the residual stresses distribution. Different points have been retained from this study. The thinning is located in the transition zone cited between the straight wall and the corner zones of hydroformed tube due to the die–tube contact conditions changes during the process. In addition, it is clear that both die–tube friction conditions and the tube bending effects, which occurs respectively in the tube straight wall and corner zones, are the principal causes of the obtained residual stresses distribution along the tube cross-section.

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Section: Introductionmentioning

confidence: 99%