Engineering Mechanics

International Conference

Proceedings Vol. 17 (2011)


ENGINEERING MECHANICS 2011

17th INTERNATIONAL CONFERENCE
May 9 – 12, 2011, Svratka, Czech Republic
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Editors: Vladimír Fuis

Copyright © 2011 Institute of Thermomechanics, Academy of Sciences of the Czech Republic, v.v.i., Prague

ISBN 978-80-87012-33-8 (printed)
ISSN 1805-8248 (printed)
ISSN 1805-8256 (electronic)

list of papers scientific commitee

COMPARISON OF NONLOCAL AND GRADIENTENHANCED DAMAGE-PLASTICITY MODEL
Horák M., Jirásek M.
pages 195 - 198, full text

This paper deals with a damage-plasticity model combining Mises plasticity with isotropic damage. Due to softening induced by damage growth, the governing differential equations lose ellipticity, which leads to an ill-posed boundary value problem. From the numerical point of view, ill-posedness is manifested by pathological sensitivity of the results to the size of finite elements. To avoid this undesired behavior, the model is regularized by a nonlocal integral formulation or, alternatively, by an implicit gradient formulation. The difference between the formulations is discussed and the behavior of both regularized models is illustrated by a numerical example.


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All papers were reviewed by members of the scientific committee.


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