Springback prediction of three-dimensional variable curvature tube bending

Zhang, Shen; Wu, Jianjun

doi:10.1177/1687814016637327

Cited by 11 publications

(8 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Authors such as Zhang and Wu 10 were more focused in the spring back behavior itself, doing an integrated research with analytic, numerical and experimental approaches, monitoring the spring back behavior of a small-diameter thick-walled tube. Other authors, in turn, are involved with the residual stress estimation in pipes such as Wang and Mirzaee-Sisan 11 who used an analytical model to study the effect of plasticity induced by bending-reverse bending-straightening on residual stress generation and redistribution in pipes.…”

Section: Introductionmentioning

confidence: 99%

Residual stress distribution in built-in beams

Castro¹,

Kenedi²,

Vignoli

et al. 2020

Proceedings of the Institution of Mechanical Engineers, Part L:

View full text Add to dashboard Cite

Metallic hyperstatic structures, like beams, submitted to excessive loads, do not fail completely before fully yielding in more than one cross section. Indeed, for built-in beams, three cross sections must be fully yielded before the final failure can occur. So, modeling the evolution of the cross-section residual stress distribution is an important subject that should be addressed to guarantee the stress analysis modeling correctness. This paper analyses the residual stress distribution evolution, in critical cross sections, of built-in beams during a transversal concentrated load growth, until the final failure through hinges formation. A finite element model is also presented. The results show good matches with the numerical model, used as a reference.

show abstract

Section: Introductionmentioning

confidence: 99%

Residual stress distribution in built-in beams

Castro¹,

Kenedi²,

Vignoli

et al. 2020

Proceedings of the Institution of Mechanical Engineers, Part L:

View full text Add to dashboard Cite

show abstract

“…Choi et al 11 performed the numerical analysis for the springback of rebar bending process, as well as the finite element analysis of dynamic mechanical behaviour during the bending process. Zhang and Wu 12 simulated the bending and springback process of minor-diameter thick-walled tube to reveal the springback laws. Petrusˇka et al 13 presented a finite element formulation aiming at the modelling of cross roll straightening process with respect to circular bars based on Eulerian description of elasto-plastic material properties.…”

Section: The Straightening Model Based On Finite Element Methods and Intelligent Algorithmmentioning

confidence: 99%

“…According to equation (12), the applied straightening moment in this stage can be finally calculated as follows…”

Section: Straightening Momentsmentioning

confidence: 99%

A novel analytical model for straightening process of rectangle-section metal bars considering asymmetrical hardening features

Zhang

Lü

Zhang

et al. 2018

Advances in Mechanical Engineering

View full text Add to dashboard Cite

The applied straightening moment and the springback after unloading with respect to the straightening process of rectangle-section metal bars have a direct influence on the straightening accuracy and efficiency. In this article, an asymmetrical hardening material model is first proposed to describe the stress-strain curves considering the asymmetrical features of yield stress and plastic hardening stage in tension and compression, and it is also compared with the traditional linear hardening material model. To accurately evaluate the elasto-plastic bending deformation and the springback in the straightening process, an analytical model for the loading and unloading moments is then established. The strain and stress distributions in elastic and plastic regions during the straightening process are also discussed in this article. Finally, the straightening experiments of rectangle-section metal bars under different heat-treated conditions are conducted on the ROSE-JZ50 straightening machine with displacement sensors, force sensors and strain gauges to validate the proposed analytical straightening model.

show abstract

“…The plastic deformation is produced in the outer surfaces of the workpiece, and the stress is described combining with Equations (4), (7), and (9).…”

Section: Straightening Momentmentioning

confidence: 99%

“…The theoretical modelling approaches of the cold-straightening process include the following three aspects: bending models based on straightening curvature, bending models based on load and deflection, and analytical models based on elasto-plastic theory [5][6][7]. The theories of predictive models are comprehensive and relatively mature, but the complex interaction between different procedures has not been considered in multi-step straightening processes, which limits the improvement of straightening accuracy.…”

Section: Introductionmentioning

confidence: 99%

Analytical Model of a Multi-Step Straightening Process for Linear Guideways Considering Neutral Axis Deviation

et al. 2018

View full text Add to dashboard Cite

Abstract:The cross-sectional shape of a linear guideway has been processed before the straightening process. The cross-section features influence not only the position of the neutral axis, but also the applied and residual stresses along the longitudinal direction, especially in a multi-step straightening process. This paper aims to present an analytical model based on elasto-plastic theory and three-point reverse bending theory to predict straightening stroke and longitudinal stress distribution during the multi-step straightening process of linear guideways. The deviation of the neutral axis is first analyzed considering the asymmetrical features of the cross-section. Owing to the cyclic loading during the multi-step straightening process, the longitudinal stress curves are then calculated using the linear superposition of stresses. Based on the cross-section features and the superposition of stresses, the bending moment is corrected to improve the predictive accuracy of the multi-step straightening process. Finite element analysis, as well as straightening experiments, have been performed to verify the applicability of the analytical model. The proposed approach can be implemented in the multi-step straightening process of linear guideways with similar cross-sectional shape to improve the straightening accuracy.

show abstract

Springback prediction of three-dimensional variable curvature tube bending

Cited by 11 publications

References 16 publications

Residual stress distribution in built-in beams

Residual stress distribution in built-in beams

A novel analytical model for straightening process of rectangle-section metal bars considering asymmetrical hardening features

Analytical Model of a Multi-Step Straightening Process for Linear Guideways Considering Neutral Axis Deviation

Contact Info

Product

Resources

About