Study on springback in deep drawn tailor welded blanks

Padmanabhan, R.; Oliveira, M. C.; Laurent, Hervé; Alves, J. L.; Menezes, L.F.

doi:10.1007/s12289-009-0566-x

Cited by 13 publications

(9 citation statements)

References 15 publications

(17 reference statements)

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“…However, study on springback in forming TWB parts remains sparse partly due to the complexity of involving too many factors in the problems. [11] Generally, different stress relaxation behaviors on the two sides of TWBs cause higher springback deflections than what are measured in the conventional design. The present paper attempts to investigate a springback controlling method for TWB through the application of variable BHF.…”

Section: Introductionmentioning

confidence: 99%

“…Certain accuracy in shape and size of stamping components made of single material can be attained through an iterative die design process using advanced material models and simulation techniques of the FE tool and with consideration of the springback elastic deformation. However, study on springback in forming TWB parts remains sparse partly due to the complexity of involving too many factors in the problems . Generally, different stress relaxation behaviors on the two sides of TWBs cause higher springback deflections than what are measured in the conventional design.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Springback Reduction in Tailor Welded Blank with High Strength Differential by Using Multi-Objective Evolutionary and Genetic Algorithms

Nguyen

Hariharan

Chakraborti

et al. 2015

steel research int.

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The springback behavior on two sides of TWIP (twinning‐induced plasticity) and mild steels tailor welded blank (TWB) is considerably different due to the large difference in strength. To reduce springback defects in a U‐draw bending process of such TWB, different non‐constant blank holding force (BHF) profiles on two sides of the blank are applied in this study. A systematic approach to obtain optimal BHF‐stroke profiles, which helps to reduce the springback is proposed. Control of the variable BHF aims at increasing the uniformity in through‐thickness of the stress component along the stretching direction, while decreasing the risk of failure due to over‐stretching. Therefore, the optimal condition would require satisfying two conflicting objectives simultaneously: (i) minimize springback deformation and (ii) minimize the forming severity, leading to a Pareto‐optimal problem. The optimization procedure consists of sampling design, finite element (FE) simulations, metamodeling, and finally the calculation of a Pareto‐frontier. Generated outputs from FE simulations on statistically significant sampling points are used for the construction of metamodels of optimum accuracy and complexity, which, in turn, are used to evaluate the output for any set of inputs, replacing the computing intensive FE simulations. A novel genetic algorithms based multi‐objective optimization technique is subsequently applied for optimization.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Springback Reduction in Tailor Welded Blank with High Strength Differential by Using Multi-Objective Evolutionary and Genetic Algorithms

Nguyen

Hariharan

Chakraborti

et al. 2015

steel research int.

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show abstract

“…To find out the stress conditions and their effects on the springback manners of deep-drawn tailor-welded blanks, numerical simulations were performed by Padmanabhan et al [9]. The tailor-welded blank models consisting of different steels were simulated and the springback was computed using split ring test.…”

Section: Introductionmentioning

confidence: 99%

Influence of process parameters on residual stresses in deep-drawing process with FEM and experimental evaluations

Kardan

Parvizi

Askari

2018

J Braz. Soc. Mech. Sci. Eng.

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This paper presents experimental and simulation study to minimize residual stress in cylindrical deep-drawing process. Eight significant process parameters including initial blank thickness, punch and die shoulder radii, blank-holder force, punch velocity, and coefficients of friction between die-blank, holder-blank, and punch-blank are considered. According to number of parameters, the Taguchi's method is employed to perform design of experiments. The die is designed and manufactured, and the experiments are carried out using AISI 1006 carbon steel sheet. Hole-drilling method based on ASTM E 837-99 standard is applied to measure the residual stresses in drawn cups. Moreover, the deep-drawing process is simulated wholly using ABAQUS/explicit software and the accuracy of finite-element model is verified using experimental results. Finally, the analysis of variance method is applied to define the most important parameters and obtain an optimum level to minimize the residual stress in cylindrical deep-drawing process. Keywords Deep-drawing Á Residual stress Á Taguchi method Á Optimization Á Finite-element method Á Experiments List of symbols BHF Blank-holder force (KN) r d Die shoulder radius (mm) r p Punch shoulder radius (mm) l d Coefficient of friction between die and blank l h Coefficient of friction between holder and blank l p Coefficient of friction between punch and blank

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“…The prediction of springback behaviour of a TWB is more complex than a conventional blank due to the differences in properties or thickness and the presence of the weld. A few studies [13][14][15] have been carried out to characterize the springback phenomenon in TWBs. Chang et al 13 studied the effect of punch profile radius on springback in TWBs with weld line oriented in transverse and longitudinal directions in U-bending.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Analytical prediction of springback in bending of tailor-welded blanks incorporating effect of anisotropy and weld zone properties

Gautam

Raut

Kumar

2016

Proceedings of the Institution of Mechanical Engineers, Part L:

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An analytical model for the prediction of springback in bending of longitudinally welded tailor-welded blanks of different thickness is presented in this paper. The effect of strain hardening, anisotropy and weld zone has been incorporated in the analytical model. Power law of strain hardening and Hill's anisotropic yield criterion have been used in the development of the analytical model for prediction of springback in tailor-welded blanks. The predicted values of springback are validated with experiments on V-bending of laser-welded blanks of Extra Deep Drawing quality steel sheets. Longitudinally welded specimens of three different thickness combinations with weld line oriented at 0 , 45 and 90 to the rolling direction are tested to investigate the effect of anisotropy. The springback values predicted by the analytical model incorporating the weld properties are found to be in good agreement with the experimental results in all of the cases. The springback has been found to be maximum when the weld line is oriented at 45 to the rolling direction.

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Study on springback in deep drawn tailor welded blanks

Cited by 13 publications

References 15 publications

Springback Reduction in Tailor Welded Blank with High Strength Differential by Using Multi-Objective Evolutionary and Genetic Algorithms

Springback Reduction in Tailor Welded Blank with High Strength Differential by Using Multi-Objective Evolutionary and Genetic Algorithms

Influence of process parameters on residual stresses in deep-drawing process with FEM and experimental evaluations

Analytical prediction of springback in bending of tailor-welded blanks incorporating effect of anisotropy and weld zone properties

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