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

Petr Zlámal; Tomáš Doktor; Ondřej Jiroušek; Ivan Jandejsek

doi:10.4028/www.scientific.net/KEM.586.265

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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
p.265

HomeKey Engineering MaterialsKey Engineering Materials Vol. 586Verification of Numerical Model for Trabecular...

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

Abstract:

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. Material model identified from three-point bending test was applied to the model of complex sample and the simulation of the compression test was performed.

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Periodical:

Key Engineering Materials (Volume 586)

Pages:

265-269

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.586.265

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Online since:

September 2013

Authors:

Petr Zlámal, Tomáš Doktor, Ondřej Jiroušek, Ivan Jandejsek

Keywords:

Compression Test, Finite Element Method (FEM), Radiography, Three-Point Bending, Trabecular Bone

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