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http://hdl.handle.net/10773/33043
Title: | Numerical study of the square cup stamping process: a stochastic analysis |
Author: | Pereira, André Filipe Gomes Ruivo, Miguel Fernandes Oliveira, Marta Cristina Fernandes, José Valdemar Prates, Pedro André |
Keywords: | Uncertainty quantification Sensitivity analysis Sobol’s indices Sheet metal forming processes Square cup |
Issue Date: | 14-Apr-2021 |
Publisher: | University of Liège |
Abstract: | The industrial demand for products with better quality and lower production costs have encouraged the widespread application of the finite element analysis (FEA) in the development and optimization of sheet metal forming processes. To ensure that the FEA solutions are reliable and robust it is important to take into account the uncertainties that inevitably arise in a real industrial environment. In this context, a numerical study on the influence of the material and process uncertainty in the stamping results of a square cup is presented. In this analysis, it is assumed uncertainty in the elasticity properties, hardening law parameters, anisotropy coefficients, blank thickness, friction coefficient and in the blank holder force. The effect of the uncertainty in these input parameters is evaluated in the punch force, equivalent plastic strain, thickness and cup geometry. Firstly, quasi-Monte Carlo method was used to evaluate the variability in the simulation outputs, considering the uncertainty of the input parameters. This analysis shows that the geometry is the output most sensitive to the uncertainty of the input parameters. Afterwards, a variance-based sensitivity analysis was carried out to identify the input parameters that most influence the output variability. It was concluded that the hardening law parameters and the anisotropy coefficients have the most influence in the stamping results variability of a square cup. |
Peer review: | yes |
URI: | http://hdl.handle.net/10773/33043 |
DOI: | 10.25518/esaform21.2158 |
ISBN: | 978-2-87019-302-0 |
Publisher Version: | https://popups.uliege.be/esaform21/ |
Appears in Collections: | TEMA - Capítulo de livro DEM - Capítulo de livro |
Files in This Item:
File | Description | Size | Format | |
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Numerical-study-of-the-square-cup-stamping-process-a-stochastic-analysis.pdf | 1.19 MB | Adobe PDF | View/Open |
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