Finite Element Simulation for Blank Shape Optimization in Sheet Metal Forming

Vafaeesefat, Abbas

doi:10.1080/10426914.2010.498072

Cited by 24 publications

(9 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Through the introduction of a finite element method [32][33][34][35][36][37][38][39][40] in Deform 3D, a simulation of open die forging with slanted flat dies was accomplished. A three-dimensional model simulation has been performed.…”

Section: Simulation Of Stress-strain Parametersmentioning

confidence: 99%

New schemes of forging plates, shafts, and discs

Zhbankov

Perig

Aliievа

2015

Int J Adv Manuf Technol

View full text Add to dashboard Cite

This paper presents the various ways of forging large forged pieces such as shafts, plates, and discs. A finite element method was used to simulate open die forging processes such as forging by flat dies with a slant, forging by staged dies, and upsetting of profiled workpiece. The parameters of the stress strain state of the billet in these processes were determined, along with the rational parameters for forging plates by flat dies with slant such as tool size and mechanical modes. The optimal die step dimension and mechanical regime for forging shafts by staged tools was determined. Also, the rational geometric parameters of the workpiece for forging discs by upsetting were determined. For these forging schemes, a simulation was done of the microstructure evolution in forgings obtained by traditional technology and new proposed technology. The paper shows the advantages of new forging schemes which provide a uniform distribution of grain size in the obtained billets.

show abstract

Section: Simulation Of Stress-strain Parametersmentioning

confidence: 99%

New schemes of forging plates, shafts, and discs

Zhbankov

Perig

Aliievа

2015

Int J Adv Manuf Technol

View full text Add to dashboard Cite

show abstract

“…This approach is widely used for square cup deep drawing, and can be found in Refs. (Park et al 1999;Shim et al 2000;Naceur et al 2004;Wang et al 2009;Vafaeesefat 2008;Vafaeesefat 2011;Fazli and Arezoo 2012;Oliveira et al 2009;Hino et al 2006;Naceur et al 2008;Liu et al 2013). …”

Section: Finite Element Analysis Modelmentioning

confidence: 99%

“…Even though this method was based on FEA, the approach was completely different to that used by others (Park et al 1999;Shim et al 2000;Kishor and Kumar 2002;Pegada et al 2002). The GSE is widely used for optimizing blank shape designs, and Wang et al (2009);Vafaeesefat (2008, 2011), and Fazli and Arezoo (2012 adopted it for determining the optimal blank shape design in deep drawing. Oliveira et al (Oliveira et al 2009) indicated that GSE cannot determine whether the finite element nodes of the blank are inside or outside the target contour.…”

Section: Introductionmentioning

confidence: 99%

Multi-objective optimization of blank shape for deep drawing with variable blank holder force via sequential approximate optimization

Kitayama

Saikyo

Kawamoto

et al. 2015

Struct Multidisc Optim

View full text Add to dashboard Cite

Optimal blank shape minimizing earing in deep drawing has a direct influence on material saving as well as product quality. A number of methods for blank shape optimization have been previously proposed, most of which adopt a closed-loop type algorithm that requires a large number of simulation runs. Numerical simulation in sheet metal forming is so numerically intensive that it is preferable to find an optimal blank shape with a small number of simulation runs. This paper proposes a method for determining the optimal blank shape design in square cup deep drawing using sequential approximate optimization (SAO) with a radial basis function (RBF) network. Sheet metal forming is multi-objective in nature, and thus the blank shape design problem is formulated as a multi-objective design optimization. The aim is therefore to identify the pareto-frontier with a small number of simulation runs. The earing is minimized under tearing and wrinkling constraints with a variable blank holder force (VBHF), which varies through the punch stroke. Numerical results show that the disconnected pareto-frontier is well identified with a small number of simulation runs. The earing of the optimal blank shape with the VBHF is also drastically reduced, when compared to a reference blank shape. Based on the numerical results, the experiments using a servo press are carried out. Consequently, the validity of the proposed approach is confirmed through the numerical and experimental results.

show abstract

“…To prevent defects such as cracking and wrinkling, and undulating, in the trial out process and reduce design cost, FE simulation can be used to check part and die geometry to optimize process parameters for a safe production. 9,10 In this paper, the applicability of numerical simulation in stretch flange forming process is studied. Two types of z-flange forming are investigated.…”

Section: Introductionmentioning

confidence: 99%

Comparison of the numerical and experimental results of the sheet metal flange forming based on shell-elements types

Vafaeesefat

Khanahmadlu

2011

Int. J. Precis. Eng. Manuf.

Self Cite

View full text Add to dashboard Cite

Flanging is a common sheet metal forming operation to produce structural sheet metal components. Flanging is used to give a component smooth rounded edge, and to provide jointing and assembling of components. In this paper, the simulation and experimental results of two types of z-flanging are investigated. First, a z-flange forming which incorporates mating drawbeads on the main and backup punches is studied. Drawbeads are used in commercial stretch flange operations to control or limit the rate of cut-out expansion. A z-flange forming is then performed on a blank with pre-punch created holes. The non-uniform deformation of the hole and undulating are two main important defects. Stretch z-flange forming is simulated using the explicit finite element (FE) LS-DYNA software. In three dimensions FE simulation, four different types of shell elements have been used to determine the one showing the best agreement with the experimental results.

show abstract

Finite Element Simulation for Blank Shape Optimization in Sheet Metal Forming

Cited by 24 publications

References 10 publications

New schemes of forging plates, shafts, and discs

New schemes of forging plates, shafts, and discs

Multi-objective optimization of blank shape for deep drawing with variable blank holder force via sequential approximate optimization

Comparison of the numerical and experimental results of the sheet metal flange forming based on shell-elements types

Contact Info

Product

Resources

About