Prediction of entire forming limit diagram from simple tensile material properties

Paul, Surajit Kumar; Manikandan, G.; Verma, Rahul Kumar

doi:10.1177/0309324713488886

Cited by 27 publications

(13 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Tensile deformation behavior of aluminum alloys in the warm working temperature range at different strain rates has been studied by several researchers. [8][9][10][11][12][13] Shehata et al 14 performed tensile tests of several Al-Mg alloys in the temperature range of 20°C-300°C. They observed that total elongation increased by five times when temperature was increased from 20°C to 300°C.…”

Section: Introductionmentioning

confidence: 99%

Effect of temperature and punch speed on forming limit strains of AA5182 alloy in warm forming and improvement in failure prediction in finite element analysis

Satish

Kumar

Merklein

2017

The Journal of Strain Analysis for Engineering Design

View full text Add to dashboard Cite

Formability of AA5182-O aluminum alloy sheets in the warm working temperature range has been studied. Forming limit strains of sheets of two different thicknesses have been determined experimentally in different modes of deformation (biaxial tension, plane strain and tension-compression) by varying temperature and punch speed. A correlation has been established for plane strain intercept of the forming limit diagram (FLD 0) with temperature, punch speed and thickness from the experimental results. This correlation has been used to plot the forming limit diagrams for failure prediction in the finite element analysis of warm deep drawing of cylindrical cups. The effect of strain and strain rate on material flow behavior has been incorporated using a strain rate-sensitive power hardening law in which the strain hardening exponent and strain rate sensitivity index have been experimentally determined. The predictions from simulations have been validated by warm deep drawing experiments. Large improvement in accuracy of failure prediction has been observed using the FLDs plotted based on the developed correlation when compared to the existing method of calculating FLD 0 using only strain hardening coefficient and thickness. The results clearly indicate the importance of incorporating temperature and punch speed in failure prediction of Al alloys using FLDs in the warm working temperature range.

show abstract

Section: Introductionmentioning

confidence: 99%

Effect of temperature and punch speed on forming limit strains of AA5182 alloy in warm forming and improvement in failure prediction in finite element analysis

Satish

Kumar

Merklein

2017

The Journal of Strain Analysis for Engineering Design

View full text Add to dashboard Cite

show abstract

“…In comparison, between defects, such as wrinkling and buckling, rupture is an irreversible defect in tube hydroforming [17][18][19][20][21]. In order to investigate the formability in the hydroforming process from the perspective of the fault rupture, numerical and experimental methods with a combination of internal pressure and axial feeding were used in this study.…”

Section: Resultsmentioning

confidence: 99%

Numerical and experimental study of bursting prediction in tube hydroforming of Al 7020-T6

Afshar

Hashemi

Madoliat

et al. 2017

Mechanics & Industry

View full text Add to dashboard Cite

In this study, forming limit diagram (FLD) of tubular material (Al 7020-T6) was determined numerically and experimentally. A set of experimental bulge tests were carried out to determine FLD under combined internal pressure and axial feeding. Also, a numerical approach which is based on the acceleration of plastic strain (i.e., the second derivation) was applied to compute the hydroforming strain limit diagram. Based on this method, the localized necking would be started when the acceleration of the max plastic strain got its maximum value. Finally, the numerical FLD was verified by experimental test results on the aluminum tube 7020-T6 and a good agreement between the proposed method and the experimental works was observed.

show abstract

“…In contrast to tensile tests, forming limit determination involves higher numbers of specimen and complicated testing procedure. In attempts to avoid such costly and time consuming tests, there are numerous analytical methods proposed in literature on the calculating FLDs using uniaxial tensile testing curve data 1 – 5 . However, uniaxial tensile curves cannot be a reliable source in determination of forming limits 6 .…”

Section: Introductionmentioning

confidence: 99%

Effects of thickness reduction in cold rolling process on the formability of sheet metals using ANFIS

Xie

Jalali

et al. 2022

Sci Rep

View full text Add to dashboard Cite

Cold rolling has detrimental effect on the formability of sheet metals. It is, however, inevitable in producing sheet high quality surfaces. The effects of cold rolling on the forming limits of stretch sheets are not investigated comprehensively in the literature. In this study, a through experimental study is conducted to observe the effect of different cold rolling thickness reduction on the formability of sheet metals. Since the experimental procedure of such tests are costly, an artificial intelligence is also adopted to predict effects of cold thickness reduction on the formability of the sheet metals. In this regard, St14 sheets are examined using tensile, metallography, cold rolling and Nakazima’s hemi-sphere punch experiments. The obtained data are further utilized to train and test an adaptive neural network fuzzy inference system (ANFIS) model. The results indicate that cold rolling reduces the formability of the sheet metals under stretch loading condition. Moreover, the tensile behavior of the sheet alters considerably due to cold thickness reduction of the same sheet metal. The trained ANFIS model also successfully trained and tested in prediction of forming limits diagrams. This model could be used to determine forming limit strains in other thickness reduction conditions. It is discussed that determination of forming limit diagrams is not an intrinsic property of a chemical composition of the sheet metals and many other factors must be taken into account.

show abstract

Prediction of entire forming limit diagram from simple tensile material properties

Cited by 27 publications

References 29 publications

Effect of temperature and punch speed on forming limit strains of AA5182 alloy in warm forming and improvement in failure prediction in finite element analysis

Effect of temperature and punch speed on forming limit strains of AA5182 alloy in warm forming and improvement in failure prediction in finite element analysis

Numerical and experimental study of bursting prediction in tube hydroforming of Al 7020-T6

Effects of thickness reduction in cold rolling process on the formability of sheet metals using ANFIS

Contact Info

Product

Resources

About