An analytical model for bending and springback of bimetallic sheets

Kagzi, Shakil A.; Gandhi, Anish H.; Dave, Harshit K.; Raval, Harit K.

doi:10.1080/15376494.2014.933990

Cited by 16 publications

(3 citation statements)

References 8 publications

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“…Springback and thickness variation have been studied and the results showed that the bending behaviour is highly influenced by the sheet-set condition. Kagzi et al [13] derived an analytical model to predict springback and thickness variation in bimetallic sheet. The results were validated with the experimental results obtained by the previous authors.…”

Section: Introductionmentioning

confidence: 99%

Experimental study on bending behaviour of aluminium-copper clad sheets in V-bending process

Srinivasan

Raja

2019

Mechanics & Industry

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The bimetallic sheets are used in the industrial sheet metal products to meet the demands of multifunctionality. The bending behaviour of bimetallic sheet is contributed by individual layers of the sheet and it is entirely different from the monolithic material. In this study, V-bending experiments are carried out to understand the springback, bend force and thickness change of Al-Cu clad sheets. The effect of different parameters such as sheet thickness, sheet setting condition, die angle, die opening and punch radius have been investigated. The results indicated that springback is more for smaller die angle, wider die opening and larger punch radius. Increase in die angle, increase in die opening or decrease in punch radius decreases the bend force. The clad sheet thickens at Al/Cu setting condition whereas it thins at Cu/Al setting condition. This thinning or thickening of the sheet influences the springback and bend force.

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Section: Introductionmentioning

confidence: 99%

Experimental study on bending behaviour of aluminium-copper clad sheets in V-bending process

Srinivasan

Raja

2019

Mechanics & Industry

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“…Shi et al 16 investigate the neutral axis location for multi-layer beam with extremely different elastic moduli. Kagzi et al 17 investigate the bending of bi-metallic sheets from springback point of view. The material model of layers was assumed as Woo and Marshall's material model.…”

Section: Introductionmentioning

confidence: 99%

Residual stresses due to roll bending of bi-layer Al-Cu sheet: Experimental and analytical investigations

Sedighi

Joudaki

Kheder

2017

The Journal of Strain Analysis for Engineering Design

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Applications of bi-layer sheets are developing in different industries. In many cases, manufacturers need to form bi-layer sheets to a desired curve by roll bending process. This process can induce considerable residual stresses. In this article, the residual stress distribution due to bending to specified curvature radius is measured in an Al-Cu sample. The sample is bent by three roll bending process to curvature radius of 350 mm. The slitting method is extended to measure induced residual stresses in bi-layer sheets. Also, an analytical solution has been proposed for prediction of residual stresses in bi-layer sheet. The analytical solution has been derived for material with elastic-power law hardening plastic behavior as the actual behavior of aluminum and copper is. Also in the analytical solution, the neutral axis movement due to different elastic moduli of aluminum and copper layer is considered. A maximum and minimum of measured residual stresses equal to 35 and 228 MPa, respectively, showing a remarkable magnitude in comparison with 51 and 36 MPa yield strength of copper and aluminum layer, respectively. Comparing the results show good agreement between analytical solution and experimental results.

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“…Wagoner and Lee [15] also discussed various advanced issues in springback prediction. Furthermore, An analytical model for springback of bimetallic sheet in bending is proposed by A. H. Gandhi et al [16] and springback behavior of bi-layer sheet in V-bending is investigated by Chintan K. Patel [17]. Recently Seo et al [18] discuss the effect of constitutive equations on springback prediction accuracy in cold stamping with various deformation modes.…”

Section: Introductionmentioning

confidence: 99%

Bauschinger Effect in spring Back Prediction of High Strength Steel: A Theoretical Approach

K¹

2018

IJRASET

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Press formed components are in huge demand now a days. Especially high strength steels are widely acceptable by different industries because of their high weight to strength ratio. Due to Poor formability, it is quite difficult to work with high strength steels. Dimensional inaccuracy is main concern with the metals having poor formability which leads to springback. So for better control over dimensions especially in assembled component springback must be predicted in advance. Accurate Springback prediction is a very crucial for commercial aspect. Many of process parameter directly or indirectly influences the springback during forming process of high strength process. Bauschinger effect is one of parameter which play important role during forming process. Many researchers already develop springback prediction model but most of them avoid consideration of Bauschinger effect due to complexity involved in Bauschinger effect. The springback results obtained from such model are far away when we consider them with experimental results. So it is very crucial to consider Bauschinger effect during springback prediction which gives near by results with experimental results. This paper deals with theories of Bauschinger effect and its impact on springback prediction modelling. Keywords: Bauschinger effect, Springback, Bending, formability, High strength steel I. INTRODUCTIONHigh strength steel covered majority share in sheet metal industries in last few years due to its good strength to weight ratio. High strength and advance high strength steel are in high demand especially in automotive and aerospace industries. While dealing with sheet metal process, springback is the one of the most critical issue. High strength steel offers a higher rate of springback because springback rate is increase with material strength. Springback is a shape change of final geometry after removal of load. It is an elasticity driven incident which is mostly manages by the stress state obtained at the end of a deformation. Depending on the product geometry and deformation regime, there are several types of springback in sheet metal forming: bending, membrane, twisting and combined bending and membrane [1]. Springback is a phenomenon to describe the elastic recovery of sheet metal after a forming operation in which the strip unbends itself after forming. Sheet metals are prone to some amount of springback due to elastic deformation. Springback prediction is a major issue for the sheet metal manufacture to evaluate the desired shape of a product. Springback refers to the shape discrepancy between the fully loaded and unloaded configurations.[2] Accurate prediction and controlling of spring back is essential in the design of tools for sheet metal forming. High strength steel sheets have played a key role in weight reduction for environmental considerations and improved crashworthiness in the automotive industry in recent years. But at the same time sheet metal forming of high strength steel is itself a critical issue since such high stren...

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An analytical model for bending and springback of bimetallic sheets

Cited by 16 publications

References 8 publications

Experimental study on bending behaviour of aluminium-copper clad sheets in V-bending process

Experimental study on bending behaviour of aluminium-copper clad sheets in V-bending process

Residual stresses due to roll bending of bi-layer Al-Cu sheet: Experimental and analytical investigations

Bauschinger Effect in spring Back Prediction of High Strength Steel: A Theoretical Approach

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