Application of abductive network and FEM to predict the optimal blank contour of an elliptic cylindrical cup from deep drawing

Chen, Lin; Kwan, Chin Tarn

doi:10.1016/j.jmatprotec.2008.03.042

Cited by 20 publications

(12 citation statements)

References 9 publications

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“…Thinning evident after deformation 18 and minor strains were measured by using a grid-marking scheme where the initial workpiece is marked with a uniform grid; after deformation, the grid is measured to determine the strain in each grid square. Manual inspection and recording of failed strain ratio results in an FLD used to determine element failure.…”

Section: Initial Blank Thicknessmentioning

confidence: 99%

Sheet-stamping process simulation and optimization

Tamasco

Rais‐Rohani

Buijk³

2011

52nd AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference

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This thesis presents the development and implementation of a generalized optimization framework for use in sheet-stamping process simulation by finite element analysis. The generic framework consists of three main elements: a process simulation program, an optimization code, and a response filtering program. These elements can be filled by any combination of applicable software packages. Example sheet-stamping process simulations are presented to demonstrate the usage of the framework in various forming scenarios. Each of the example simulations is presented with a sensitivity analysis. These examples include analysis of a 2-dimensional single-stage forming, a 2-dimensional multi-stage forming, and two different 3-dimensional single-stage forming processes. A forming limit diagram is used to define failure in the 3-dimensional process simulations. Optimization results are presented using damage minimization, thinning minimization, and springback minimization with aluminum alloy 6061-T6 blanks.

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Section: Initial Blank Thicknessmentioning

confidence: 99%

Sheet-stamping process simulation and optimization

Tamasco

Rais‐Rohani

Buijk³

2011

52nd AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference

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“…It is important to design and optimize the initial blank shape so as to reduce the earing without the geometrical defect. It is also possible to avoid wrinkling and tearing through the forming process with optimum initial blank shape (1)(2)(3)(4)(5)(6)(7)(8) . In order to determine the optimum initial blank shape, many papers with numerical simulation have been published.…”

Section: Introductionmentioning

confidence: 99%

“…Agrawal et al employed an upper bound approach to predict the initial blank shape (6) , in which the thickness deviation and earing of formed product were taken into account. Lin and Kwan applied an abductive network with the FEA to predict the initial blank shape for minimizing earing (7) . Hammami et al proposed a deformation based approach to determine the initial blank shape called push/pull technique (8) .…”

Section: Introductionmentioning

confidence: 99%

Optimization of Initial Blank Shape with a Variable Blank Holder Force in Deep-Drawing via Sequential Approximate Optimization

Srirat

Kitayama

Yamazaki

2012

JAMDSM

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In this paper, the initial blank shape is optimized via sequential approximate optimization (SAO) with radial basis function (RBF) network. In deep drawing, the wrinkling and tearing are major defects. In addition, too small initial blank shape will results in the boundary of blank drawn into a trimming contour, which is the geometrical defect. Therefore, these three defects are taken as the design constraints. On the other hand, the flange area, which is often called the earing, is taken as the objective function. Also, variable blank holder force (VBHF) trajectory is determined. In this paper, new algorithm to evaluate the earing and the geometrical defect is also proposed for the SAO. Numerical result shows that the optimization of the initial blank shape with VBHF trajectory leads to defect-free product. In comparison with the use of square blank shape with a constant blank holder force, 60% reduction of the waste of material can be achieved.

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“…The finite element method was employed in conjunction with the adductive network to predict the optimum blank contour of an elliptic cylindrical cup with ear-less in deep drawing. A finite element-based code was also utilized to investigate the material flow characteristics under different process parameters, thus establishing a predictive model [2]. In another investigation, the finite element simulations were carried out to determine the formability characteristics of aluminum steel tailor welded blanks [3].…”

Section: Introductionmentioning

confidence: 99%

Effect of Die Radius on Blank Holder Force and Drawing Ratio: A Model and Experimental Investigation

Sezek

Savaş

Aksakal

2010

Materials and Manufacturing Processes

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A numerical model for a newly designed deep drawing process has been built up and analyzed using the finite element method (FEM) in comparison with performed experiments using the DIN 10130-99-DC05 sheet material. It was aimed to increase the limiting drawing ratio ( ) and decrease the blank holder forces (BHFs). To predict the deformation behavior of the process, the parameters are analyzed using FEM. The effects of the die radius, blank holder and punch forces, friction, cup wall, and blank thickness in the process were investigated. A deep drawing die set was designed and manufactured, and the validity of the design was demonstrated through the theoretical and experimental analysis. The results showed that the blank holder die radii and friction have the greatest effect on the thickness of deformed steel cups. The drawing ratio of has an influence on the BHFs and it decreased with increasing die angle ( ). The was considerably increased by 26% compared with dies having no angle ( = 0 ). The current design and analyses can help the optimization of the control scheme of drawing processes rather than using the conventional designs. A comparison of the predicted and experimental results showed good agreement.

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Application of abductive network and FEM to predict the optimal blank contour of an elliptic cylindrical cup from deep drawing

Cited by 20 publications

References 9 publications

Sheet-stamping process simulation and optimization

Sheet-stamping process simulation and optimization

Optimization of Initial Blank Shape with a Variable Blank Holder Force in Deep-Drawing via Sequential Approximate Optimization

Effect of Die Radius on Blank Holder Force and Drawing Ratio: A Model and Experimental Investigation

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