Experimental and Numerical Studies on Spring back in U-Bending of 3-Ply Cladded Sheet Metal

Gautam, Vijay; Sharma, Pankaj Kumar; Kumar, Deepak

doi:10.1016/j.matpr.2017.12.010

Cited by 7 publications

(3 citation statements)

References 13 publications

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“…Spring back increases with the increase in galvanizing thickness. Gautama et al [8] used the experimental set-up to determine spring back and its finite element analysis in a U-bending operation of a 3-ply sheet metal that consists of three layers of different thicknesses of SS430 and SS304 with AA1050 in the core. The spring back values obtained from the experiments are always higher than the finite element simulation results.…”

Section: Introductionmentioning

confidence: 99%

Process parameter optimization for spring back in steel grade sheet materials under V-bending using FEM and ANN approach

Magar

Agrawal

2023

Ironmaking & Steelmaking

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Spring back compensation is essential for accurate geometry of sheet metal components. In this paper the effect of process parameters namely sheet thickness, bend angle and tool travel rate on spring back in SS304 and C80 material sheets under V-bending is predicted by using finite element method and artificial neural network approaches. Total nine experiments were designed considering three process parameters, each with three levels, by using Taguchi`s L9 orthogonal array. The results obtained by ANN model are in good agreement with FEM model. This establish the robustness of ANN model for predicting spring back value and may be used an alternative to FEM model as the latter is more expensive and time consuming. The optimized value of sheet thickness, bend angle and tool travel rate are 2 mm, 80°and 6 mm ms -1 respectively for SS 304 material and 2 mm, 80°and 2 mm ms -1 for C80 material.

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Section: Introductionmentioning

confidence: 99%

Process parameter optimization for spring back in steel grade sheet materials under V-bending using FEM and ANN approach

Magar

Agrawal

2023

Ironmaking & Steelmaking

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“…Gautam et al 12 studied the springback behaviour of three-ply sheet metal in U-bending. It is observed that for the clad sheet, tensile strength is highest and ductility is lowest in the specimens oriented at 90°to the rolling direction (RD).…”

Section: Introductionmentioning

confidence: 99%

Experimental and numerical investigations of springback and residual stresses in bending of a three-ply clad sheet

Sharma

Gautam

Agrawal

2021

Proceedings of the Institution of Mechanical Engineers, Part L:

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In the present work, springback behaviour of a three-ply clad sheet metal, comprising of layers of SS430 and SS304 sandwiched with a layer of AA1050 is investigated in V-bending by using analytical, experimental and simulation techniques. The developed analytical model is based on theory of bending using Hill’s anisotropic yield criterion. The tensile properties of the clad sheet and individual layers oriented at three different directions w.r.t. the rolling direction are characterized. The tensile properties of the individual layers are used in the material model of analytical and numerical predictions of the springback. It is observed that the samples of the clad sheet which are transverse to the rolling direction, exhibit highest springback values due to higher tensile strength of the sheet when compared with the results acquired for other two orientations w.r.t. the rolling direction. These results are endorsed by the springback results obtained from analytical and simulation methods. The effect of sheet setting on the die during bending is also investigated using different techniques. The resulting longitudinal stresses before and after springback are analysed on inner and outer layers of the tested samples using experimental and numerical simulation procedures. In both the cases of sheet settings, the results of residual stress after springback predicted by simulations agree with the experimental results except a few cases.

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“…Some researchers have investigated the spring-back of layer sheets when formed under U-die bending. Gautam and Sharma 13 studied the spring-back of 3-Ply SS430 and SS304 cladding metal sheets with AA1050 in the core where the layers had different thicknesses. They showed that the experimental results and FE simulations were in a good agreement.…”

Section: Introductionmentioning

confidence: 99%

Novel U-bending designed setups for investigating the spring-back/spring-go of two-layer aluminum/copper sheets through experimental tests and finite element simulations

Etemadi

Naseri

Valinezhad

2020

Proceedings of the Institution of Mechanical Engineers, Part L:

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This paper presents novel U-bending setups in order to investigate the effects of the curvatures created on the punch, die, or both on the spring-back/spring-go of the two-layer aluminum/copper sheets. Comparison of the new U-bending setups with the regular ones showed that the curvatures had important roles in reducing the spring-back/spring-go in the U-bending process. The results further indicated the good agreement between spring-back/spring-go and finite element simulations. Moreover, through finite element simulations, the effects of three effective parameters on reducing the spring-back/spring-go, including the curvature radius ( r) of the punch, the distance between curvature center and the fillet center ( d) in the punch, and the curvature radius at the end of the die ( R) were investigated. In achieving the desired state (90°), the results showed that the distance of curvature center from the fillet center ( d) was a more important parameter compared with the curvature radius at the end of the punch ( r) and the curvature radius at the end of the die ( R). This paper also focuses on the thicknesses of copper and aluminum as well as the stacking sequence of layers. Concerning the thicknesses of the implemented copper and aluminum change, the minimum angle of the spring-back/spring-go relative to the desired state was 75% Al/25% Cu thickness. Furthermore, the spring-back of aluminum/copper was lower than the copper/aluminum layer sheet. The effects of both thickness changing and stacking sequence of aluminum/copper layers on the spring-back/spring-go amounts of different sheets were due to the relocation of the neutral axis.

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Experimental and Numerical Studies on Spring back in U-Bending of 3-Ply Cladded Sheet Metal

Cited by 7 publications

References 13 publications

Process parameter optimization for spring back in steel grade sheet materials under V-bending using FEM and ANN approach

Process parameter optimization for spring back in steel grade sheet materials under V-bending using FEM and ANN approach

Experimental and numerical investigations of springback and residual stresses in bending of a three-ply clad sheet

Novel U-bending designed setups for investigating the spring-back/spring-go of two-layer aluminum/copper sheets through experimental tests and finite element simulations

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