A HOT FLOW CURVE APPROXIMATION VIA BIOLOGY-INSPIRED ALGORITHMS

1 Opěla Petr
Co-authors:
1 Schindler Ivo 1 Rusz Stanislav 1 NAVRÁTIL Horymír
Institution:
1 VSB – Technical University of Ostrava, Ostrava, Czech Republic, EU, petr.opela@vsb.cz
Conference:
28th International Conference on Metallurgy and Materials, Hotel Voronez I, Brno, Czech Republic, EU, May 22nd - 24th 2019
Proceedings:
Proceedings 28th International Conference on Metallurgy and Materials
Pages:
455-460
ISBN:
978-80-87294-92-5
ISSN:
2694-9296
Published:
4th November 2019
Proceedings of the conference were published in Web of Science and Scopus.
Metrics:
34 views / 14 downloads
Abstract

Biology-inspired algorithms represent a set of various techniques which can be used e.g. in the case of high-nonlinear approximation tasks. In the presented research, this kind of algorithms was utilized to approximate the experimental flow curve dataset of the micro-alloyed manganese-vanadium steel. Two methodically different representatives, namely a genetic algorithm optimization and an artificial neural network approach, were applied for this purpose. In the first case, a genetic-algorithm-optimization technique was used to calculate the material constants of two flow stress models. These models were then applied to describe the flow curves of the examined steel. In the second case, an artificial neural network was assembled, adapted and used to deal with the flow curve approximation issue. Graphical results have showed a high accuracy with respect to both approximation methods. Nevertheless, the following statistical evaluation has revealed a much higher fit in the case of the proposed neural network approach.

Keywords: Hot flow curve approximation, genetic algorithm, artificial neural network
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