Evaluation of the sensitivity of springback to various process parameters of aluminum alloy sheet with different heat treatment conditions

Hakimi, S.; Soualem, A.

Abstract: The forming steps by permanent deformation controlled by the tools generate a distribution of stresses inside the material which directly depends on the work hardening properties of the latter. The change in boundary conditions following the removal of the tools imposes the material to redistribute the stresses in the sections in a manner compatible with the new boundary conditions. This new distribution necessarily operates by local elastic deformations that result globally in a general change of shape called springback. This geometrical deviation can be minimized by the meticulous focus of the tools, but it cannot generally be completely annihilated due to the influence of several parameters. For this reason, the study of the influence of the different technological factors and physico-metallurgical parameters on the springback for the different metals is very important to design and properly realize forming tools. The main objective of this work is to find solutions to problems encountered in sheet metal forming such as the problem of springback. Our work has two essential purposes: the first is summarized in an experimental study based on theoretical analyses. To this end, much effort is made to add a new design of parts for a U-type stretch-bending device and adapt it to a tensile testing machine. This design has the advantage of modifying and assembling all parameters affecting springback at the same time and also of carrying out several forming processes on the same device. The second goal is the experimental and numerical prediction of springback, and the study of the effect of various stretch-bending process parameters such as punch velocity, the orientation of the sheet (anisotropy), hold time and punch-die clearance on springback behavior under heat treatment of aluminum alloy sheets with three different rolling directions (0°,45°,90°). A finite element (FE) model of stretch-bending has been established by utilizing ABAQUS/CAE software. From this analysis, it can be concluded that the springback is affected by the anisotropy of the sheet and the heat treatment in the stretch-bending process. The obtained experimental results were compared with the numerical simulations found in good agreement.

How to cite this paper

        APA: Hakimi, S & Soualem, A. (2021). Evaluation of the sensitivity of springback to various process parameters of aluminum alloy sheet with different heat treatment conditions. Engineering Solid Mechanics, 9(3), 323-334.
    

        Chicago/Turabian: Hakimi, S & Soualem, A. 2021. "Evaluation of the sensitivity of springback to various process parameters of aluminum alloy sheet with different heat treatment conditions." Engineering Solid Mechanics 9, no. 3 (2021): 323-334.
    

        AMA: Hakimi, S & Soualem, A. Evaluation of the sensitivity of springback to various process parameters of aluminum alloy sheet with different heat treatment conditions. Engineering Solid Mechanics. 2021;9(3):323-334.
    

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