| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Mechanics and Physiological Adaptation of Hard and Soft Biomaterials and Biological Tissues
|
| Presentation Title |
Impact of Test Environment on the Fracture Resistance and Critical Damage Strain of Cortical Bone |
| Author(s) |
Bernd Gludovatz, Mihee Shin, Penny J. Martens, Jamie J. Kruzic, Björn Busse |
| On-Site Speaker (Planned) |
Bernd Gludovatz |
| Abstract Scope |
Water is crucial for the interplay of collagen and minerals and consequently influences bone strength and ductility. Dehydration alters bone’s mechanical properties; however, studies comparing dehydrating environments on fracture toughness are scarce. Crack resistance of human and sheep cortical bone was characterized in a bio-bath, in ambient conditions, and in scanning electron microscopes (SEMs) under three different conditions (water vapor pressure, air pressure, and high-vacuum) to better understand the impact of test environments on crack initiation toughness, K0, and crack growth resistance. Results show significantly lower K0 values and lower crack growth resistance for samples that were tested inside any SEM environment compared to air. Testing of hydrated samples in ambient air revealed elevated crack growth resistance relative to the bio-bath while K0 was similar for both environments. Our data was then used to develop an interface damage model for crack deflection at the cement lines of the osteon boundaries. |
| Proceedings Inclusion? |
Planned: |