Optimization of forging processes using Finite Element simulations

Authors:
Martijn H. Bonte;Lionel Fourment;Tien-Tho Do;A. H. Boogaard;J. Huétink
Affiliations:
University of Twente, AE, The Netherlands 7500;Mines ParisTech, CEMEF, CNRS, UMR 7635, Sophia Antipolis Cedex, France 06904;Mines ParisTech, CEMEF, CNRS, UMR 7635, Sophia Antipolis Cedex, France 06904;University of Twente, AE, The Netherlands 7500;University of Twente, AE, The Netherlands 7500
Venue:
Structural and Multidisciplinary Optimization
Year:
2010

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Abstract

During the last decades, simulation software based on the Finite Element Method (FEM) has significantly contributed to the design of feasible forming processes. Coupling FEM to mathematical optimization algorithms offers a promising opportunity to design optimal metal forming processes rather than just feasible ones. In this paper Sequential Approximate Optimization (SAO) for optimizing forging processes is discussed. The algorithm incorporates time-consuming nonlinear FEM simulations. Three variants of the SAO algorithm--which differ by their sequential improvement strategies--have been investigated and compared to other optimization algorithms by application to two forging processes. The other algorithms taken into account are two iterative algorithms (BFGS and SCPIP) and a Metamodel Assisted Evolutionary Strategy (MAES). It is essential for sequential approximate optimization algorithms to implement an improvement strategy that uses as much information obtained during previous iterations as possible. If such a sequential improvement strategy is used, SAO provides a very efficient algorithm to optimize forging processes using time-consuming FEM simulations.