Verification of Numerical Model for Trabecular Tissue using Compression Test and Time-Lapse X-Ray Radiography based on Material Model Determined from Three-Point Bending Test of Single Trabecula

0395993 - ÚTAM 2014 RIV CH eng C - Conference Paper (international conference)
Zlámal, P. - Doktor, Tomáš - Jiroušek, Ondřej - Jandejsek, I.
Verification of Numerical Model for Trabecular Tissue using Compression Test and Time-Lapse X-Ray Radiography based on Material Model Determined from Three-Point Bending Test of Single Trabecula.
Key Engineering Materials. Vol. 586. Durnten-Zurich: Trans Tech Publications, 2014 - (Pešek, L.; Zubko, P.), s. 265-269. ISBN 978-3-03785-876-9. ISSN 1013-9826.
[International Conference on Local Mechanical Properties /9./. Levoča (SK), 07.11.2012-09.11.2012]
R&D Projects: GA ČR(CZ) GAP105/10/2305
Institutional support: RVO:68378297
Keywords : compression test * FEM * radiography * three-point bending
OECD category: Materials engineering
www.scientific.net/KEM.586.265

The aim of this study is to determine constitutive constants for elasto-plastic material model with damage for single trabecula based on the indirect simulation of micromechanical testing and its verification at macro level using compression test of the cylindrical sample of the trabecular tissue. Three-point bending test of isolated trabeculae was performed in a shielding box and deflection of the sample was acquired using X-ray microradiography. Measured values (displacements of markers) were used for indirect identification of the material model for single trabecula using finite element (FE) method. The bending test was simulated and results were fitted to experimentally obtained values and the appropriate set of material constants was determined. To verify the applicability of the identified material model the compression test of the complex sample was carried out. Cylindrical sample was incrementally loaded and each loading state was captured using the micro-computed tomography.
Permanent Link: http://hdl.handle.net/11104/0225600