Study of the stress-strain state during sheet stamping of a U-shaped part with a variable bending radius
DOI:
https://doi.org/10.37142/2076-2151/2025-1(54)32Keywords:
bending, sheet metal stamping, deformation, stress, operation.Abstract
Danylets Y., Tkachov V., Chukhlib V., Tymofieiev V., Khodyriev H. Study of the stress-strain state during sheet stamping of a U-shaped part with a variable bending radius
The article analyses publications on sheet metal bending operations for the manufacture of various parts for different industries, especially in the modern world. In compiling the literature review, the main focus is on the types of bending operations and their application for obtaining U-shaped parts. At the same time, attention is paid to the main parameters of shape change during bending, namely the bending radius of sheet material. As a result, computer modelling of the bending operation with a variable radius on the lower die was selected for the study. The main result of the work is to determine the influence of the bending radius on the change in stress intensity, deformation resistance, plastic deformation, deformation rate and force load of the bending process when obtaining a U-shaped part during sheet metal stamping.
It was found that increasing the bending radius leads to the following results: the decrease in the stress intensity and deformation resistance indicators is approximately the same and is about 7%, and the plastic deformation values are reduced by 24%, but the most significant is the reduction in the force load by 21%. The results of modeling the sheet metal stamping process during bending showed the defect-free manufacturing of the part according to the selected parameters and the advantage of choosing the lower die with a radius of 5 mm, which is confirmed by the decrease in the force required for stamping, as well as stresses and plastic deformation.
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