Numerical simulation of high-speed forming of plates from light alloys taking into account the localization of plastic deformation and the evolution of damage

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Abstract

This paper presents the results of a numerical study of plastic deformation and crack formation processes during the pressing a hemispherical punch at speeds of 5 and 10 m/s into AMg2 aluminum alloy plates and MA2-1 magnesium alloy plates, which belong to different isomechanical groups of light alloys. The aim of the study was to investigate the adequacy of the predictions of numerical modeling of plastic deformation and crack formation in light alloy plates during high-speed stamping without preheating. To describe the mechanical behavior of the alloys, modifications of the Zerilli-Armstrong models for alloys with a face-centered cubic crystal lattice and a hexagonal close-packed lattice, as well as the Gurson-Tvergaard-Needleman model of damage and destruction of deformable media were used. It is shown that the modifications of the models allow predicting the features of deformation localization development during high-speed stamping, which lead to the formation of localized zones of damage to light alloys and cracks, using numerical simulation. The simulation results indicate the possibility of increasing plastic deformations in alloy plates before their destruction at room temperature with increasing stamp speed. The effect of increasing the ultimate plastic deformations under biaxial high-speed tension is realized when extruding alloy plates with a hemispherical punch at a speed of 10 m/s. The obtained results substantiate the possibility of using the considered modifications of the models for computer design of high-speed stamping technologies without heating of light alloys related to the FCC and HCP isomechanical groups, which expands the potential of using dynamic stamping for the production of products from light alloy sheet metal.

Keywords

numerical simulationhigh-speed forminglight alloysaluminum alloysmagnesium alloysdynamic punching teststrain localizationdamage.

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Article information

Published
17 December 2025
Issue date
17 December 2025
Issue
No. 5 (2025)
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