Application of the bending theory on square-hollow sections made from high-strength steel with a changing angle of the bending plane

Hudovernik, M.; Kosel, Franc; Staupendahl, Daniel; Tekkaya, A. Erman; Kuzman, Karl

doi:10.1016/j.jmatprotec.2014.05.016

Cited by 17 publications

(8 citation statements)

References 8 publications

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“…The basic principle of a torque superposed spatial bending method was proposed by Brosius et al [ 18 ] and Staupendahl et al [ 19 , 20 ]. Based on this principle and the theory of elastic–plastic mechanics, Hudovernik et al [ 21 ] established an analytical model for the spatial bending of square tubes and verified the validity of the analytical model by comparing the forming process parameters obtained by numerical simulation, experiment, and analytical calculation. However, this model assumed that the strain on the section was balanced, so the error was relatively large.…”

Section: Introductionmentioning

confidence: 99%

Mechanical Modeling of Tube Bending Considering Elastoplastic Evolution of Tube Cross-Section

Zhang

et al. 2022

Materials

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Aluminum alloy tubes are widely used in various industries because of their excellent performance. Up to now, when the tube is bent, the elastoplastic deformation evolution mechanism of the cross-section has not been clear, and no direct analytical proof has been found. In this paper, based on the bilinear material model assumption, a new mechanical model of tube plane bending deformation is constructed. The analytical model can describe in detail the evolution mechanism of elastic–plastic deformation on the cross-section of the tube after bending deformation, the position of the elastic–plastic boundary, the position of the radius of the strain neutral layer, and the relationship between the bending moment over the section and the bending radius. According to this model, the deformation law of the tube cross-section during bending is elucidated. The results are as follows: (1) the deformation evolution of the cross-section of the bending deformed tube calculated by the analytical model is in good agreement with the finite element model (FEM) of pure bending. (2) By comparing the results of the analytical model with FEM results, and the processing test of the self-designed four-axis free bending forming tube bender, the bending moments are in good agreement. (3) Compared with the bending moments calculated by several other analytical models of tube bending, this model has a relatively small deviation value.

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Section: Introductionmentioning

confidence: 99%

Mechanical Modeling of Tube Bending Considering Elastoplastic Evolution of Tube Cross-Section

Zhang

et al. 2022

Materials

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“…Deformation behaviors of the thin-walled rectangular tube and angle iron of continuous varying radii have been investigated by Cheng et al [20] and Li et al [21], respectively. Using the innovative torque superposed spatial (TSS) bending method, the bending behaviors of thin-walled profiles made from high-strength steels for a changing angle of the bending plane have been fully characterized by Hudovernik et al [29] based on the principle of a simplified cantilever beam model. Analogously, Staupendahl and Tekkaya [30] utilized the same bending approach to build a comprehensive analytical process model to consider the reciprocal effects of bending and torsion applied to the forming zone and their impact on the bending moment and springback.…”

Section: Introductionmentioning

confidence: 99%

Deformation behavior of convolute thin-walled AA6061-T6 rectangular tubes manufactured by the free bending forming technology

Cheng

Zhao

El-Aty

et al. 2021

Int J Adv Manuf Technol

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During manufacturing thin-walled tubes using free bending forming (FBF) technology, defects such as wrinkling, cracking, and cross-section distortion are easy to exist due to various forming parameters' direct and indirect influence, which seriously influences the forming quality of the rectangular tubes. Thus, in this study, the finite element (FE) modeling of thin-walled AA6061-T6 rectangular tubes manufactured by FBF technology was accomplished and verified through experimentation. Moreover, the influence of different parameters on the deformation behavior of the rectangular tubes was systematically investigated using FE modeling. The results showed that the maximum thickness changing rate and the cross-section distortion appeared once the bending die moved to the maximum eccentricity (U max ). Besides, with the increase of yield strength-Young's modulus ratio (σ s /E), thickness (t 0 ), fillet radius (R f ), clearance (Δc), friction coefficient (f), and chamfer radius of the guider (R c ), the thickness changing rate and the cross-section distortion decrease, while the bending radius enlarges simultaneously when the parameters are set within reasonable limits. Unlike the above parameters, with the improvement of the axial feeding speed (V f ), the thickness changing rate declines while the fluctuation of bending radius is not significant. Under the joint action of the axial force P L , the structural characterization of the rectangular tube and the dies of constraints, the thinning of the outer wall and the web distortion are inhibited, and the variation amplitude of them is much smaller than that of thickening of the inner wall and flange distortion during the free bending process.

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“…Gantner proposed a finite element model that defined the shaping parameters for the springback prediction in 3D bending of tubes [14,15]. Hudovernik et al [16,17] carried out the numerical simulations of the bending and torsion of the pipes. Their results lead to better understanding of the springback and cross-sectional deformation of square tubes.…”

Section: Introductionmentioning

confidence: 99%

Springback analysis of thick-walled tubes under combined bending-torsion loading with consideration of nonlinear kinematic hardening

Farhadi

Nayebi

2020

Prod. Eng. Res. Devel.

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Numerical solution to the problem of the springback of thick wall tubes is investigated with consideration of nonlinear kinematic hardening model. Also, the effects of different types of loading and their sequences on the springback of these pipes have been investigated. In the employed approach in this research, the precision of the springback forecast has increased, which will reduce the cost and time for assembly of materials. Considering the effects of loading, it is possible to take steps to reduce springback. In addition, the problem is simulated by finite element method, in addition to modeling this problem, its results can be used to validate the numerical solution of the problem. It is shown when the bending loading rate increases, the bending springback angle decreases and with increasing torsional loading rate compared to the bending loading, the torsional springback angle decreases. Also, by changing the loading sequence, for example, bending and then fixing the bending radius and increasing the torsional angle (torsional loading) can significantly reduce bending springback angles.

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Application of the bending theory on square-hollow sections made from high-strength steel with a changing angle of the bending plane

Cited by 17 publications

References 8 publications

Mechanical Modeling of Tube Bending Considering Elastoplastic Evolution of Tube Cross-Section

Mechanical Modeling of Tube Bending Considering Elastoplastic Evolution of Tube Cross-Section

Deformation behavior of convolute thin-walled AA6061-T6 rectangular tubes manufactured by the free bending forming technology

Springback analysis of thick-walled tubes under combined bending-torsion loading with consideration of nonlinear kinematic hardening

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