Improved contact procedure for implicit finite element sheet forming simulation

2010 ◽  
Vol 83 (13) ◽  
pp. 1759-1779 ◽  
Author(s):  
S. Zhuang ◽  
M. G. Lee ◽  
Y. T. Keum ◽  
J. H. Kim ◽  
R. H. Wagoner
Keyword(s):  
Finite Element ◽  
Sheet Forming ◽  
Forming Simulation

Topology Optimization of Blank Geometry for the Sheet Forming Process

2012 ◽  
Author(s):  
Saber DorMohammadi ◽  
Mohammad Rouhi ◽  
Masoud Rais-Rohani
Keyword(s):  
Topology Optimization ◽  
Volume Fraction ◽  
Structural Response ◽  
Sheet Forming ◽  
Forming Process ◽  
Exchange Method ◽  
Forming Simulation ◽  
Blank Shape Optimization ◽  
Blank Shape ◽  
Consistent Subset

The newly developed element exchange method (EEM) for topology optimization is applied to the problem of blank shape optimization for the sheet-forming process. EEM uses a series of stochastic operations guided by the structural response of the model to switch solid and void elements in a given domain to minimize the objective function while maintaining the specified volume fraction. In application of EEM to blank optimization, a sheet forming simulation model is developed using Abaqus/Explicit. With the goal of minimizing the variability in wall thickness of the formed component, a subset of solid (i.e., high density) elements with the highest increase in thickness is exchanged with a consistent subset of void (i.e., low density) elements having the highest decrease in thickness so that the volume fraction remains constant. The EEM operations coupled with finite element simulations are repeated until the optimum blank geometry (i.e., boundary and initial thickness) is found. The developed numerical framework is applied to blank optimization of a benchmark problem. The results show that EEM is successful in generating the optimum blank geometry efficiently and accurately.

Concurrent Engineering Design of Sheet Stamping by Using an Inverse FE Approach

1997 ◽  
Author(s):  
Shiyong Yang ◽  
Kikuo Nezu
Keyword(s):  
Finite Element ◽  
Concurrent Engineering ◽  
Process Simulation ◽  
Three Dimensional ◽  
Sheet Forming ◽  
Design Stage ◽  
Forming Process ◽  
Element Analysis ◽  
Preliminary Design Stage ◽  
Product And Process

Abstract An inverse finite element (FE) algorithm is proposed for sheet forming process simulation. With the inverse finite element analysis (FEA) program developed, a new method for concurrent engineering (CE) design for sheet metal forming product and process is proposed. After the product geometry is defined by using parametric patches, the input models for process simulation can be created without the necessity to define the initial blank and the geometry of tools, thus simplifying the design process and facilitating the designer to look into the formability and quality of the product being designed at preliminary design stage. With resort to a commercially available software, P3/PATRAN, arbitrarily three-dimensional product can be designed for manufacturability for sheet forming process by following the procedures given.

Evaluation of Biaxial Forming Limits by Bulge Testing

2006 ◽  
Vol 519-521 ◽  
pp. 117-124 ◽  
Author(s):  
S.R. MacEwen ◽  
Y. Shi ◽  
P. Hamstra ◽  
R. Mallory ◽  
Pei Dong Wu
Keyword(s):  
Finite Element ◽  
Finite Element Modelling ◽  
Rolling Direction ◽  
Major Axis ◽  
Sheet Forming ◽  
Biaxial Strain ◽  
Forming Limits ◽  
Element Modelling ◽  
Bulge Testing

Finite element modelling of sheet-forming operations, such as pressure-ram-forming, (PRF™) requires knowledge of forming limits under biaxial strain conditions. In this work, elliptical bulge tests have been used to evaluate the forming limits of an aluminum bodystock alloy, X309, that is used for PRF™ applications. Limiting dome heights have been determined as a function of pressure-rate and temperature. All tests have been done with the rolling direction, RD, of the sheet aligned with the major axis of the bulge.

Study on contact algorithm of dynamic explicit FEM for sheet forming simulation

2001 ◽  
Vol 6 (3) ◽  
pp. 704-708
Author(s):  
Zhang Hai-ming ◽  
Dong Xiang-huai ◽  
Li Zhi-gang
Keyword(s):  
Sheet Forming ◽  
Forming Simulation ◽  
Contact Algorithm

Finite Element Peen Forming Simulation

2012 ◽  
pp. 681-686
Author(s):  
Alexandre Gariépy ◽  
Simon Larose ◽  
Claude Perron ◽  
Philippe Bocher ◽  
Martin Lévesque
Keyword(s):  
Finite Element ◽  
Forming Simulation ◽  
Peen Forming
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