Formability of AA5182/polypropylene/AA5182 sandwich sheets

Kim, K.J.; Kim, D.; Choi, Suk-Woo; Chung, Kyung‐Hwan; Shin, Kwang Seon; Barlat, Frédéric; Oh, Kanghun; Youn, Jae Ryoun

doi:10.1016/s0924-0136(03)00173-0

Cited by 108 publications

(53 citation statements)

References 15 publications

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“…The LDR predicted has good correlation with experimental results [4]. The analyses done by Kim et al showed that the main cause of improvement in forming limit of sandwich sheets as compared to single sheet is because of its thickness, and the forming limit predicted has reasonably good agreement with experimental data [5]. Liu et al [6] showed through experimental and numerical simulation results that sandwich sheet with the stick interfacial condition has the highest formability and the forming limit of sandwich sheet improved with increasing the interfacial adhesion strength.…”

Section: Introductionsupporting

confidence: 51%

Predicting the tensile behaviour of adhesively bonded sheets using equivalent geometrical heterogeneities

Satheeshkumar

Narayanan

2015

Int J Mater Form

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In the present work, the formability of adhesively bonded sandwichsteel sheets is predicted during tensile tests, with the help of equivalent geometrical heterogeneities in the base sheets, without incorporating adhesive layer and properties during modelling simulations. This will help us mainly to overcome the difficulties while incorporating adhesion/ adhesive properties during formability simulation and prediction. The limit strains during the tensile test are predicted and validated with experiments. The effect of hardener to resin (H/R) ratios of adhesive on the forming limit strains has been predicted with a set of thickness heterogeneity factor 'f' and size (w) of the defect, located in the base material. In other words, a relationship between defect morphology (f, w) and adhesive properties has been evaluated. For example, in the case of rectangular-infinite groove of width, w = 0.5 mm, the limit strains of DDQ steel evaluated during tensile tests at f=0.912, f=0.9137, f=0.924, f= 0.927, and f=0.95 are equivalent to the H/R ratios of 0.6:1, 0.7:1, 0.8:1, 0.9:1, and 1:1 of adhesive, respectively. The limit strains are predicted in the same manner with a square hole and finite square defect in the base material. It is suggested that the overall forming (tensile) behaviour of adhesively bonded blanks (ABB) can be predicted with the help of a thickness heterogeneity factor (or similar geometrical heterogeneities) that is equivalent to all the geometrical and structural heterogeneities in the whole bonded sheets.

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Section: Introductionsupporting

confidence: 51%

Predicting the tensile behaviour of adhesively bonded sheets using equivalent geometrical heterogeneities

Satheeshkumar

Narayanan

2015

Int J Mater Form

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“…The Yld 2000 [40] formulation has been included by Aretz [6] in the MK model for studying the influence of the biaxial coefficient of plastic anisotropy on the FLCs. Kim et al [166] used the Yld2000 [40] criterion to analyze the formability of a sandwich sheets. FLD for multi-layered sandwich sheets considering the material properties of each layer has been formulated with assumption of the viscorigid plastic material based on the modified MK model [167].…”

Section: Prediction Of the Flcmentioning

confidence: 99%

Advances in anisotropy and formability

et al. 2010

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This paper presents synthetically the most recent models for description of the anisotropic plastic behavior. The first section gives an overview of the classical models. Further, the discussion is focused on the anisotropic formulations developed on the basis of the theories of linear transformations and tensor representations, respectively. Those models are applied to different types of materials: body centered, faced centered and hexagonalclose packed metals. A brief review of the experimental methods used for characterizing and modeling the anisotropic plastic behavior of metallic sheets and tubes under biaxial loading is presented together with the models and methods developed for predicting and establishing the limit strains. The capabilities of some commercial programs specially designed for the computation of forming limit curves (FLC) are also analyzed.

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“…They are also used as a parameter in finite element analysis either to determine where the material exceeds the level of formability or to compare the formability of different materials. The influence of temperature on the forming behaviour (FLD) of aluminium/polypropylene/aluminium composites in deep drawing was investigated in [26]. This work shows a significant change in the viscoelastic -plastic level of the core, thereby decreasing the drawability by increasing the forming temperature and reducing the spring-back effect in drawing tests.…”

Section: Fig 4 Set-up Of the Corona Discharge For The Polyolefin Foilmentioning

confidence: 99%

Production of Customized High-Strength Hybrid Sandwich Structures

Sokolova

Carradò

Palkowski

2010

AMR

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The production process and the forming behaviour of locally reinforced steel/polymer/steel (316L/PP-PE/316L) hybrid sandwich composite materials (SMS) have been investigated. The effect of simple plate reinforcements with different size, shape and geometry on the forming limits of SMS was studied. As a local reinforcement, the simple solid steel and mesh steel plate inlays with central and edge positions were chosen instead of a polymer core as a sandwich laminate. In order to increase the adhesion properties between the metal and polymer layers, corona discharge and plasma preliminary surface treatments were applied prior to the sandwich production. Both, deep drawing and stretching cup-forming tests were performed in order to analyse the forming behaviour as well as the failure of SMS with and without local inlays subject to different tensile loadings. The influence of the local reinforcement on the bending behaviour was determined by three and four-point bending processes. Stress-strain curves and thinning behaviour of SMS with local reinforcements under the different forming loads were determined using digital image correlation via photogrammetry. The forming behaviour strongly depends on the quality, geometry and size of the local plate inlays. Owing to the different positions of reinforcement as well as to the different polymer content around of inlays, failure of SMS by bending and drawing differs. The sandwich samples with mesh reinforcement demonstrate better formability by drawing and bending than that of samples with solid plates. In order to minimise the loss in formability of sandwich samples during deep drawing, the size of the centred reinforcement has to be larger than the punch diameter.

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Formability of AA5182/polypropylene/AA5182 sandwich sheets

Cited by 108 publications

References 15 publications

Predicting the tensile behaviour of adhesively bonded sheets using equivalent geometrical heterogeneities

Predicting the tensile behaviour of adhesively bonded sheets using equivalent geometrical heterogeneities

Advances in anisotropy and formability

Production of Customized High-Strength Hybrid Sandwich Structures

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