Calibration of a Distornional Hardening Model of Plasticity

0380228 - ÚT 2013 RIV GB eng C - Conference Paper (international conference)
Plešek, Jiří - Hrubý, Zbyněk - Parma, Slavomír - Feigenbaum, H. P. - Dafalias, Y.F.
Calibration of a Distornional Hardening Model of Plasticity.
Proceedings of the Eleventh International Conference on Computational Structures Technology. Kippen: Civil-Comp Press, 2012 - (Topping, B.), s. 1-11. ISBN 978-1-905088-54-6. ISSN 1759-3433.
[International Conference on Computational Structures Technology /11./. Dubrovník (HR), 04.09.2012-07.09.2012]
R&D Projects: GA ČR GA101/09/1630; GA ČR GAP201/10/0357
Institutional research plan: CEZ:AV0Z20760514
Keywords : directional distortional hardening * metal plasticity * yield surface
Subject RIV: JJ - Other Materials

Directional distortion hardening is manifested by the distortion of the shape of the yield surface such that a region of high curvature develops roughly in the direction of loading while a region of lower curvature develops in the opposite direction. Recently, several models were proposed. The simplest one studied, makes use of the Armstrong- Frederick rule, having five independent parameters. The analytical solution for uniaxial cyclic test is derived together with that for the stabilized cyclic response. The evolving shapes of the yield surfaces and their sensitivity to inputs parameters are analysed. An algorithm for material constants fitting is proposed.
Permanent Link: http://hdl.handle.net/11104/0007132