Engineering Mechanics

International Conference

Proceedings Vol. 8 (2002)


INŽENÝRSKÁ MECHANIKA 2002

ENGINEERING MECHANICS 2002

NATIONAL CONFERENCE WITH INTERNATIONAL PARTICIPATION
May 13 – 16, 2002, Svratka, Czech Republic
;
Editors: Lubomír Houfek, Pavel Hlavoň, Petr Krejčí

Copyright © 2002 Institute of Mechanics of Solids, Faculty of Mechanical Engineering, Bruno University of Technology, Brno

ISBN 80-214-2109-6 (printed)
ISSN 1805-8248 (printed)
ISSN 1805-8256 (electronic)

list of papers scientific commitee

Visco-plastic model for polycrystalline rocks
M. Mühlbauer, Z. Bittnar
pages 189 - +10p., full text

The long-term behaviour of a crystalline rock has been modelled as a viscoplastic problem. The Perzyna type of material models, which is based on socalled overstress, has been used. The constitutive law, known as Lemaitre's creep model is based on the use of internal state variables attached to specific phenomena, including hardening of material. The identification of model was carried out with aid of genetic algorithms and experimentally obtained data. The used genetic algorithm is based on differential evolution scheme and was adapted for fast model parameter identification.


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Text and facts may be copied and used freely, but credit should be given to these Proceedings.

All papers were reviewed by members of the scientific committee.


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