Development of Visco-elasto-plastic Material Model for Human Trabecular Bone using Nanoindentation

0359950 - ÚTAM 2012 RIV DE eng C - Conference Paper (international conference)
Zlámal, Petr - Kytýř, Daniel - Jiroušek, Ondřej - Němeček, J.
Development of Visco-elasto-plastic Material Model for Human Trabecular Bone using Nanoindentation.
10th Youth Symposium on Experimental Solid Mechanics. Chemnitz: Chemnitz University of Technology, 2011 - (Stockmann, M.; Kretzschmar, J.), s. 127-128. ISBN 978-3-941003-34-7.
[Youth Symposium on Experimental Solid Mechanics /10./. Chemnitz (DE), 25.05.2011-28.05.2011]
R&D Projects: GA ČR(CZ) GAP105/10/2305
Institutional research plan: CEZ:AV0Z20710524
Keywords : trabecular bone * material model * nanoindentation
Subject RIV: FI - Traumatology, Orthopedics
http://www.tu-chemnitz.de/mb/FestKoerpMech/YSESM/proceedings.php

Knowledge of trabecular bone behaviour under loading is very important for the bone quality assessment. For investigation of deformation behaviour of trabecular bone a combination of computational and experimental method was used. In this study suitable visco-elasto/plastic material model for single trabeculae was established from numerical simulation of nanoindentation test. The visco-elasto/plastic model with von Mises yield criterion and bilinear isotropic hardening with implicit creep was chosen. Pure elastic material constants can be determined directly from nanoindentation test by Oliver-Pharr method. Other constants determining the plastic and creep behaviour of the model have to be identified indirectly by fitting the load-displacement curve to results from the Finite Element (FE) simulation of nanoindentation test.
Permanent Link: http://hdl.handle.net/11104/0197623