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Nanofibril-mediated Fracture Resistance of Bone by Tertuliano, Ottman A.; Edwards, Bryce W.; Meza, Lucas R.; Deshpande, Vikram S.; Greer, Julia R. is a scholarly article available to read on EtoBox.

What is Nanofibril-mediated Fracture Resistance of Bone about?

Natural hard composites like human bone possess a combination of strength and toughness that exceeds that of their constituents and of many engineered composites. This augmentation is attributed to their complex hierarchical structure, spanning multiple length scales; in bone, characteristic dimensions range from nanoscale fibrils to microscale lamellae to mesoscale osteons and macroscale organs. The mechanical properties of bone have been studied, with the understanding that the isolated microstructure at micro- and nano-scales gives rise to superior strength compared to that of whole tissue, and the tissue possesses an amplified toughness relative to that of its nanoscale constituents. Nanoscale toughening mechanisms of bone are not adequately understood at sample dimensions that allow for isolating salient microstructural features, because of the challenge of performing fracture experiments on small-sized samples. We developed an in-situ three-point bend experimental methodology that probes site-specific fracture behavior of micron-sized specimens of hard material. Using this, we quantify crack initiation and growth toughness of human trabecular bone with sharp fatigue pre-crack

Author

Tertuliano, Ottman A.; Edwards, Bryce W.; Meza, Lucas R.; Deshpande, Vikram S.; Greer, Julia R.

Published

2020

Language

EN