Identification of elasto-visco-plastic constitutive material model with damage for porous material based on the indirect finite element simulation of the nanoindentation test

0383327 - ÚTAM 2013 RIV CZ eng C - Conference Paper (international conference)
Zlamal, P. - Jiroušek, Ondřej - Králík, V.
Identification of elasto-visco-plastic constitutive material model with damage for porous material based on the indirect finite element simulation of the nanoindentation test.
Experimental Methods and Numerical Simulation in Engineering Sciences. Praha: Czech Technical University, Faculty of Transportation Sciences, 2012 - (Jiroušek, O.; Kytýř, D.), s. 107-110. ISBN 978-80-01-05062-0.
[Bilateral Czech/German Symposium /13./. Telč (CZ), 05.06.2012-08.06.2012]
R&D Projects: GA ČR(CZ) GAP105/10/2305
Grant - others:GA ČR(CZ) GAP105/12/0824
Program: GA
Institutional support: RVO:68378297
Keywords : Alporas * FEM * metal foam * trabecular bone * visco-elasto-plastic with damage
Subject RIV: FI - Traumatology, Orthopedics

The aim of this study is to determine elasto-visco-plastic material model with damage for two basic structure elements of diferent porous materials: (i) human single trabecula and (ii) wall of Alporas metal foam. Indirect identification of constants of the material model is based on the numerical simulations of the nanoindentation test using custom-built optimization algorithm. During the optimization procedure the numerical results are fitted to the experimentally obtained nanoindentation curves and the best set of the constants is determined using the least squares method. For evaluation of the influence of the individual material constants a sensitivity study is performed.
Permanent Link: http://hdl.handle.net/11104/0213295