|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||Biological Materials Science Symposium
||Analysis of Naturally-occurring and Biomimetic Rod Like Microstructures
||Enrique Escobar de Obaldia, Chanhue Jeong, Steven Herrera, Lessa Grunenfelder, David Kisailus, Pablo Zavattieri
|On-Site Speaker (Planned)
Some naturally-occurring high-performance ceramics, like the external veneer of the Chiton tooth, exhibit a rod-like microstructure and remarkable abrasion resistant properties. Nanoindentation tests not only provide some key mechanical properties of the surface of the tooth but are also an effective test to induce and analyze damage mechanisms at the nano- and micron-scale level. In this presentation, we will present a 3D finite element-based micromechanical model for the simulation of nanoindentation cracking in a fully mineralized tooth. This proposed model is capable of capturing damage, fracture and fragmentation of the mineral rods, and energy dissipation at the organic interfaces. A correlation between the rod-like ultrastructure and the abrasion tolerant properties will be discussed. A comparison of the model with indentation test in a 3D printing prototypes with similar features confirms the key role of the interactions between organic and mineral phases in the mechanical properties of biomaterials.
||Planned: Publication Outside of TMS (Indicate publication title and publisher if known.)