Forming limit diagram prediction of AA5052/polyethylene/AA5052 sandwich sheets

Liu, Jianguang; Liu, Wei; Wang, Xue

doi:10.1016/j.matdes.2012.09.057

Cited by 78 publications

(21 citation statements)

References 23 publications

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“…It is observed from their work that the sandwich sheet has a better formability than single AA5052 sheet, and the core layer has got positive influence if its thickness is increased. The forming limit predictions show good agreement with the experimental results [3]. Parsa et al predicted the limiting drawing ratio (LDR) of the AA3105/polypropylene/AA3105 sandwich sheet using finite element simulations by incorporating GTN damage model to identify plastic instability.…”

Section: Introductionmentioning

confidence: 56%

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: Introductionmentioning

confidence: 56%

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

Satheeshkumar

Narayanan

2015

Int J Mater Form

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“…The potential use of SPIF for forming sandwich panels to act as 3D shells has been reported by Jackson et al [18]. Sandwich panels have found applications in aerospace, marine, automotive and civil engineering [176]. For instance, automotive components such as dash panel and inner wheel housing may use these panels [177].…”

Section: Applications Using Sandwich Panelsmentioning

confidence: 96%

Single point incremental forming: An assessment of the progress and technology trends from 2005 to 2015

Behera

Sousa

Ingarao

et al. 2017

Journal of Manufacturing Processes

218

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The last decade has seen considerable interest in flexible forming processes. Among the upcoming flexible forming techniques, one that has captured a lot of interest is Single Point Incremental Forming (SPIF), where a flat sheet is incrementally deformed into a desired shape by the action of a tool that follows a defined toolpath conforming to the final part geometry. Research on SPIF in the last ten years has focused on defining the limits of this process, understanding the deformation mechanics and material behavior and extending the process limits using various strategies. This paper captures the developments that have taken place over the last decade in academia and industry to highlight the current state of the art in this field. The use of different hardware platforms, forming mechanics, failure mechanism, estimation of forces, use of toolpath and tooling strategies, development of process planning tools, simulation of the process, aspects of sustainable manufacture and current and future applications are individually tracked to outline the current state of this process and provide a roadmap for future work on this process.

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“…Benseddiq and Imad [24] examined ductile tearing using the GTN damage model. Liu [25] used the GTN model to simulate the forming process of sandwich sheet and to predict its forming limit. Chen et al [26] integrated the GTN model with Hill's quadratic anisotropic yield criterion to analyze the influence of plastic anisotropy on both deformation behavior and damage evolution of the material during sheet metal forming.…”

Section: Introductionmentioning

confidence: 99%

Numerical simulation of incremental sheet forming based on GTN damage model

Xie

et al. 2015

Int J Adv Manuf Technol

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An attempt was made to analyze the damage evolution and ductile fracture of incremental forming at the microscopic level. Firstly, an extended Gurson-TvergaardNeedleman (GTN) model integrating with Hill'48 anisotropic yield criterion was established and numerically implemented by User-defined Material Subroutine (VUMAT) in the commercial finite element software ABAQUS. Then, the VUMAT program was verified via a single element test, and its damage parameters were determined through the combination of the simulation and the experiment of a tensile test. Afterwards, based on the extended GTN model, a finite element model of incremental forming was established and experimentally verified. And the influence of different values of two damage parameters, the volume fraction of void nucleating particles f N and the mean plastic strain value when voids nucleate ε N , on the damage evolution of incremental forming was explored. It shows that there is almost no connection between the microscopic equivalent strain ε pl m and the values of f N and ε N . However, the maximum value of void volume fraction will increase significantly with the increase of f N or with the decrease of ε N . Finally, void volume fraction was proved to be an effective index to predict crack occurrence of incremental forming.

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Forming limit diagram prediction of AA5052/polyethylene/AA5052 sandwich sheets

Cited by 78 publications

References 23 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

Single point incremental forming: An assessment of the progress and technology trends from 2005 to 2015

Numerical simulation of incremental sheet forming based on GTN damage model

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