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Springback equation of small curvature plane bending
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TLDR
In this article, a new analytical method for springback of small curvature plane bending is addressed with unloading rule of classical elastic-plastic theory and principle of strain superposition.Abstract:
A new analytical method for springback of small curvature plane bending is addressed with unloading rule of classical elastic-plastic theory and principle of strain superposition. We start from strain analysis of plane bending which has initial curvature, and the theoretic derivation is on the widely applicable basic hypotheses. The results are unified to geometry constraint equations and springback equation of plane bending, which can be evolved to straight beam plane bending and pure bending. The expanding and setting round process is one of the situations of plane bending, which is a bend-stretching process of plane curved beam. In the present study, springback equation of plane bending is used to analyze the expanding and setting round process, and the results agree with the experimental data. With a reasonable prediction accuracy, this new analytical method for springback of plane bending can meet the needs of applications in engineering.read more
Citations
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Springback compensation method for doubly curved plate in multi-point forming
TL;DR: In this paper, an algorithm for springback compensation and modification for doubly curved plate was proposed by a combination method of theoretical analysis, numerical simulation and forming experiment, and the calculation equation for curvature was obtained based on an elastic-perfectly plastic biaxial bending model.
Journal ArticleDOI
A study on springback of profile plane stretch–bending in the loading method of pretension and moment
TL;DR: In this paper, the authors provided a theoretical foundation for stretch-bending flexible manufacturing based on the classical elastic-plastic theory and the characteristic of strain superposition, and the universal analytic method of solving the plane stretch-bing springback of profile with any cross-section was obtained.
Journal ArticleDOI
Analytical springback assessment in flexible stretch bending of complex shapes
Jun Ma,Torgeir Welo +1 more
TL;DR: Overall, the FM analytical strategy has proven its capability as an effective tool, which can make springback knowledge more explicit, generic and reuseable for stretching-controlled bending processes.
Journal ArticleDOI
Stretch bending and springback of profile in the loading method of prebending and tension
TL;DR: In this paper, the deformation types and springback of rectangular and U-section profiles are predicted and verified by numerical simulations and experiments, and a comparative study of the results by three methods clearly demonstrates that the prediction of springback is reliable.
Journal ArticleDOI
A new iterative method for springback control based on theory analysis and displacement adjustment
TL;DR: Wang et al. as mentioned in this paper proposed a sheet elements compensation (SEC) method to solve the springback problem in sheet metal forming, which is based on the displacement adjustment (DA) method.
References
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Journal ArticleDOI
Springback and residual stresses after stretch bending of workhardening sheet metal
TL;DR: In this paper, the elastic springback and residual stress after stretch bending of a rectangular section of 7075 Aluminum sheet are evaluated both in analytical and graphical form, and the variation of the amount of spring-back and the unfavorable residual stresses for elastic-plastic and fully plastic cases are given both in graphical and analytical form.
Journal ArticleDOI
Determination of stretch-bendability of sheet metals
TL;DR: The sheet-metal forming industry relies mostly on experience-based methods for finding the forming limits which assure successful forming processes as discussed by the authors, such methods are inefficient and there is an obvious need for cost-effective knowledge-based computer-aided techniques.
Journal ArticleDOI
Determination of stretch-bendability limits and springback for T-section beams
A.A. Elsharkawy,A.A. El-Domiaty +1 more
TL;DR: In this article, a mathematical model for stretch bending of T-section beams is introduced and a complete analysis using the strength-of-materials approach is carried out for two different locations of the flange of the beam with respect to the forming die.
Journal ArticleDOI
Stretch-bending analysis of U-section beams
TL;DR: In this paper, a complete analysis for stretch-bending of U-section beams is introduced and the variations of the applied bending moment with the applied axial load for fully elastic, elastic-plastic and fully plastic conditions are derived.
Journal Article
The new researche progress of sheet metal stamping springback
TL;DR: The history and progress of springback researche in bending and 3D shallow drawing are allsidedly presented in this article with three aspects of theoretic analyzing, numerical simulating and springback controlling.
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