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Title: Stretching the limits of forming processes by robust optimization: A demonstrator

Robust design of forming processes using numerical simulations is gaining attention throughout the industry. In this work, it is demonstrated how robust optimization can assist in further stretching the limits of metal forming processes. A deterministic and a robust optimization study are performed, considering a stretch-drawing process of a hemispherical cup product. For the robust optimization study, both the effect of material and process scatter are taken into account. For quantifying the material scatter, samples of 41 coils of a drawing quality forming steel have been collected. The stochastic material behavior is obtained by a hybrid approach, combining mechanical testing and texture analysis, and efficiently implemented in a metamodel based optimization strategy. The deterministic and robust optimization results are subsequently presented and compared, demonstrating an increased process robustness and decreased number of product rejects by application of the robust optimization approach.
Authors:
 [1] ;  [2] ;  [3]
  1. Materials innovation institute (M2i), P.O. Box 5008, 2600 GA, Delft (Netherlands)
  2. Tata Steel, P.O. Box 10000, 1970 CA, IJmuiden (Netherlands)
  3. University of Twente, Faculty of Engineering Technology, P.O. Box 217, 7500 AE, Enschede (Netherlands)
Publication Date:
OSTI Identifier:
22261653
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1567; Journal Issue: 1; Conference: NUMISHEET 2014: 9. international conference and workshop on numerical simulation of 3D sheet metal forming processes, Melbourne (Australia), 6-10 Jan 2014; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
97 MATHEMATICAL METHODS AND COMPUTING; 36 MATERIALS SCIENCE; COMPUTERIZED SIMULATION; OPTIMIZATION; STEELS; TEXTURE