This paper is devoted to investigating numerically, by finite element analysis (FEA), and analytically the influences and effects of laser processing of the surface of thin-plate, low-carbon structural steel. The plate mechanical properties—axial and flexural stiffnesses, force-deflection behavior and cross-section force-strain behavior—are investigated after different laser treatments. An analytical methodology of the estimation of the cross-section area of the laser-processed metal is also proposed in the present article, that can be applied to choosing the reasonable distance between the centers of the laser-processed tracks. The methodology takes into account the width of the laser-processed tracks and the distances between these tracks. The experimental, finite element numerical and analytical analyses showed that the laser treatments of the surface of the steel plate increase the yield point of the laser-processed metal and the axial and flexural stiffnesses of the plate.
This paper presents the results of computer simulations and experimental studies, aiming to increase the mechanical strength of sheet metal parts manufactured from high-quality structural carbon steel by means of local laser processing. The effects of laser processing on the strength of steel sheet plates and their ability to resist bend load after laser treatment were studied. The results of bending experiments and computer simulations of elastoplastic deformation establish that local laser processing with surface melting can be used to increase the mechanical strength of structural elements made from thin sheet steel C22E and to decrease its deflection under similar workload, as an alternative to the application of complex geometric shapes, additional strengthening elements, or heat treatment.
The main objective of the research was to determine the influence of local laser treatment on the process of elastoplastic deflection of the sheets under bending force. FEA modelling results show, that the location of the treated area and the number of laser tracks on a thin-walled sheet surface had a large influence on the stress distribution and sheet deflections during bending. The FEA analysis of equivalent Von-Mises stresses, normal stresses, deflection of steel sheets and applied bending forces confirms that the steel samples with the lasertreated area have greater resistance against bending and reduced deflection under the same bending forces. FEA investigation shows that a greater strengthening effect on thin-walled steel sheets could be achieved through the application of double-sided laser treatment of the sheet surface in comparison with untreated or one-side treated steel sheets.
The main goal of the study was to determine the effect of local laser treatment on bending stresses under load. The simulation results show that the different locations and number of laser tracks (internal rigidity ribs) on the thin-sheet surface had a influence on the stress distribution under bending loads. Finite element analysis of the equivalent von Mises stresses and bending of thin sheet steels confirms that specimens with internal stiffeners are more resistant to bending loading.
This paper describes the development of new metal-processing technologies that enable the control and improvement of the microstructure and properties of metals. This study investigates the impact of one such technology, laser treatment, on the surface of a thin sheet of non-alloy structural steel. This research aims to address a crucial challenge in expanding the industrial applications of thin-sheet steel products by developing a laser processing technology to create structural strengthening ribs, which can significantly influence the overall strength and stiffness of metal components.
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