Finite element analysis of springback in bending of aluminium sheets

Esat, Volkan; Darendelıler, Haluk; Gökler, Mustafa İlhan

doi:10.1016/s0261-3069(01)00062-0

Cited by 61 publications

(40 citation statements)

References 10 publications

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“…It can also be observed from Figure 5 that springback increases with increasing yield strength, thickness and curvature. This is in agreement with work previously reported by other authors [7,11]. …”

Section: Comparison Of Predicted Sprinback Ratio With Experimental Resupporting

confidence: 94%

“…A good review of these previous works can be found in references [7][8][9]. Other workers have used the finite element method [10][11].…”

Section: Introductionmentioning

confidence: 99%

“…A good review of these previous works can be found in references [7][8][9]. Other workers have used the finite element method [10][11].The earliest attempt to find an analytical solution for springback correction was started by Sturm and Fletcher [3] in the aircraft industry in the early 1940s. The solution developed was however cumbersome to apply.…”

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confidence: 99%

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A Closed Form Solution for Predicting Springback in Bending of Beams Including Hardening Effect

Castro¹,

Durodola

2009

Volume 5 Number 2

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ABSTRACT:Springback is an implicit phenomenon in most forming processes and needs to be accounted for in the design of forming tools. This is essential in order to limit the number of iterations required during the design and fabrication of forming tools and dies. This work presents a closed form solution for predicting springback in bending including hardening effect. Springback was also determined using experimental testing. The results obtained are compared with analytical results and the influence of hardening on springback is analysed. INTRODUCTIONSheet metal forming is one of the most important manufacturing processes for mass production in industry. Several sheet-forming processes include bending. In these processes, plastic deformation is followed by some elastic recovery upon unloading. This change in shape is known as springback and its extent depends on material properties, geometry and tooling dimensions. Springback can be particularly significant in structures, panels and components formed into large radii.Springback results in the deviation of a component from a desired shape after the forming load is removed. This means that additional geometric adjustments have to be made to account for it in the design of forming tools and dies. The phenomenon has been analysed using different procedures over the last few decades. Early works by researchers developed correction curves using empirical relations based on experimental testing [1-2]. Many analytical solutions have subsequently been derived [3][4][5][6]. A good review of these previous works can be found in references [7][8][9]. Other workers have used the finite element method [10][11].The earliest attempt to find an analytical solution for springback correction was started by Sturm and Fletcher [3] in the aircraft industry in the early 1940s. The solution developed was however cumbersome to apply. It requires explicit determination of distances from the neutral plane to beam surfaces as well as surface stresses. Schroeder [5] presented another analytical solution in 1943 but this was also rather complex to implement. It was not until the late 1950s when by examining narrow beams of an elastic-perfectly plastic material that Gardiner [6] developed a solution for determining springback after bending that was far simpler to use. Gardiner's formula has been embraced by the metals forming community for decades as a very good approximation for the calculation of springback.As highlighted in the foregoing, Gardiner's solution assumes elastic perfectly plastic material behaviour. Most engineering materials however exhibit strain hardening with significant increase in strength in the post yield regime. It will therefore be helpful to obtain a more general and accurate closed form equation for predicting springback that account for this factor. This work presents a closed form solution for predicting springback in bending including hardening effect. Springback was also determined by experimental testing and the results obtained are compared with analytical...

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Section: Comparison Of Predicted Sprinback Ratio With Experimental Resupporting

confidence: 94%

“…A good review of these previous works can be found in references [7][8][9]. Other workers have used the finite element method [10][11].…”

Section: Introductionmentioning

confidence: 99%

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A Closed Form Solution for Predicting Springback in Bending of Beams Including Hardening Effect

Castro¹,

Durodola

2009

Volume 5 Number 2

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“…Because yield strength of DP800 is higher than DP600 material, it is clear from Figure 7 and Table 3, its amount of springback behavior is also higher. This means that from Figure 6 it was determined that amount of springback is high for materials having higher yield strength while it is low for materials having lower yield strength [1,6].…”

Section: Fig 5 Illustration Of Deformed Regionsmentioning

confidence: 99%

“…Keum and Han [5], analyzed the effects of springback values of different aluminum alloys at various shaping temperatures after bending and found out that hot bending decreased the amount of bending. Esat et al [6] numerically and experimentally investigated springback of aluminum having different thicknesses using different angled die and concluded that the springback was decreased for the materials. Moon et al [7] investigated the effect of tool temperature on the springback of an aluminium 1050 sheet and showed that the combination of hot die and cold punch could improve the forming quality based on the preliminary experimental results of draw bending process.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Springback Behavior of DP Series Sheet Metal in Bending Process

Uslu¹,

Tosun²,

Tosun³

2016

Fourth International Conference on Advances in Mechanical and Automation Engineering - MAE 2016

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Abstract-In the study, the springback behavior took place during V bending of DP series Sheet metals having different quality was experimentally investigated. For this purpose, sheet metal having quality of DP800 and DP600 with size of 45x90 mm thickness of 1, 1.5 and 2 mm and V bending die having 60, 90, and 120 o angles were used. The data obtained from results of experimental studies was graphically represented and the evaluated.

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Enhancement in Expert System

Hingole¹

2014

Advances in Metal Forming

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Finite element analysis of springback in bending of aluminium sheets

Cited by 61 publications

References 10 publications

A Closed Form Solution for Predicting Springback in Bending of Beams Including Hardening Effect

A Closed Form Solution for Predicting Springback in Bending of Beams Including Hardening Effect

Investigation of Springback Behavior of DP Series Sheet Metal in Bending Process

Enhancement in Expert System

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