Experimental and finite element investigation on wrinkling of circular single layer and two-layer sheet metals in deep drawing process

Morovvati, M.R.; Fatemi, Afshin; Sadighi, Mojtaba

doi:10.1007/s00170-010-2931-9

Cited by 44 publications

(18 citation statements)

References 22 publications

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“…In their work, the GTN damage model was used to identify plastic instability. Morovvati et al [7,8] carried out a study on the wrinkling behaviour of adhesively bonded sheets with the effect of blank holding force (BHF) and the effect of parameterssuch as lay-up and material properties byexperimental deep drawing test and finite element simulation. The simulation results showed that increase in BHFreduces wrinkling in the deep drawing process, and it was found to be a good agreement with the experimental results.…”

Section: Introductionmentioning

confidence: 99%

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: 99%

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

Satheeshkumar

Narayanan

2015

Int J Mater Form

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“…These sheets are well known for their excellent mechanical and functional properties, corrosion resistance and electrical conductivity. All of the studies done on these sheets have been about manufacturing and forming of them [28][29][30][31][32], so it would be useful to study the impact strength of them using an appropriate damage model.…”

Section: Introductionmentioning

confidence: 99%

Experimental and numerical investigation of impact resistance of aluminum–copper cladded sheets using an energy-based damage model

Saeedi

Morovvati

Mollaei-Dariani

2020

J Braz. Soc. Mech. Sci. Eng.

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Cladded multilayer multi-material sheets are now extensively being used in different engineering fields. These sheets are well known for their excellent mechanical and functional properties, corrosion resistance and electrical conductivity. In the present study, low velocity impact of cladded two-layer sheets has been studied experimentally and numerically. The desired sheets were fabricated from aluminum AA1200 and copper (OFHC), and then, they were impacted at the impact energy of 45 J using two different impactor nose shapes. The effect of stacking sequence of the constituent layers on impact behavior of the cladded sheets was also investigated. Numerical modeling of the problem was carried out using finite element method where an energy-based rate-dependent damage model was developed and employed to model the behavior of the impacted sheets including damage initiation and evolution. The required rate constants were achieved using a direct experimental procedure as well as a calibration process via genetic algorithm. Also, for the numerical part of the research, one more impactor nose shape and two more impact energies were considered to be studied. Accuracy of both the finite element modeling and developed damage model was admitted by comparing the numerical results with experimental ones. Moreover, the achieved results prove the advantage of the Al/Cu sheet over the Cu/Al one in terms of both the energy absorption and impact strength.

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“…Their studies indicated that the contact of stainless steel with the punch leads to the maximum drawing ratio in direct redrawing, but the aluminium should contact the punch in order to obtain the highest drawing ratio in reverse redrawing. Morovvati et al [5] used the experimental and finite element investigation on wrinkling of circular two-layer metal sheets in the deep drawing process, and the influences of different blank holder forces on winkling were analysed. They also studied the relationship between the required forming force and the drawing radio.…”

Section: Introductionmentioning

confidence: 99%

Numerical investigation on the forming behaviour of stainless/carbon steel bimetal composite

et al. 2018

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Abstract. Bimetal composites have wide applications due to their excellent overall performance and relatively low comprehensive cost. The aim of this study is to investigate the forming behaviour of stainless/carbon steel bimetal composite during stamping by finite element method (FEM). In this work, the bonding interface of bimetal composite sheet was assumed to be perfect without delamination during the plastic forming process for simplicity. Uniaxial tensile tests on base metal (carbon steel) and compositing metal (stainless steel) were first carried out, respectively, in order to obtain the tensile properties of each of the component materials required in the forming simulation. Processing variables, including the layer stacking sequence, relative thickness ratios of two layers and friction were considered, and their effects on the distributions of circumferential stress and thickness strain were analysed. The bimetal composite sheet was set as the eight-node solid elements in the developed FEM model, which is effective for evaluating the distributions of circumferential stress and thickness strain, and predicting the high-risk region of necking during the stamping of bimetal composites. The simulation results can be used as an evaluation indicator of the capability of forming machine to ensure the bimetal composite can be safely formed.

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Experimental and finite element investigation on wrinkling of circular single layer and two-layer sheet metals in deep drawing process

Cited by 44 publications

References 22 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

Experimental and numerical investigation of impact resistance of aluminum–copper cladded sheets using an energy-based damage model

Numerical investigation on the forming behaviour of stainless/carbon steel bimetal composite

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