- Tytuł:
- A numerical study on indentation properties of cortical bone tissue : Influence of anisotropy
- Autorzy:
-
Demiral, M.
Abdel-Wahab, A.
Silberschmidt, V. - Powiązania:
- https://bibliotekanauki.pl/articles/306784.pdf
- Data publikacji:
- 2015
- Wydawca:
- Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
- Tematy:
-
analiza MES
anizotropia
metoda Olivera i Pharra
identacja
finite element analysis
anisotropy
Oliver–Pharr method
cortical bone tissue
indentation - Opis:
- Purpose: The purpose of this study is to investigate the effect of anisotropy of cortical bone tissue on measurement of properties such as direction-dependent moduli and hardness. Methods: An advanced three-dimensional finite element model of microindentation was developed. Different modelling schemes were considered to account for anisotropy of elastic or/and plastic regimes. The elastic anisotropic behaviour was modelled employing an elasticity tensor, and Hill’s criteria were used to represent the direction-dependent post-yield behaviour. The Oliver–Pharr method was used in the data analysis. Results: A decrease in the value of the transverse elasticity modulus resulted in the increased material’s indentation modulus measured in the longitudinal direction and a decreased one in the transverse direction, while they were insensitive to the anisotropy in post-elastic regime. On the other hand, an increase in plastic anisotropy led to a decrease in measured hardness for both directions, but by a larger amount in the transverse one. The size effect phenomenon was found to be also sensitive to anisotropy. Conclusions: The undertaken analysis suggests that the Oliver–Pharr method is a useful tool for first-order approximations in the analysis of mechanical properties of anisotropic materials similar to cortical bone, but not necessarily for the materials with low hardening reserves in the plastic regime.
- Źródło:
-
Acta of Bioengineering and Biomechanics; 2015, 17, 2; 3-14
1509-409X
2450-6303 - Pojawia się w:
- Acta of Bioengineering and Biomechanics
- Dostawca treści:
- Biblioteka Nauki
Artykuł