caa a22 4500 475782798 CHVBK 20180406123649.0 cr unu---uuuuu 170329e20001001xx s 000 0 eng 10.1023/A:1008909830421 doi (NATIONALLICENCE)springer-10.1023/A:1008909830421 Bone fracture analysis on the short rod chevron-notch specimens using the X-ray computer micro-tomography [Elektronische Daten] [R. Santis, P. Anderson, K. Tanner, L. Ambrosio, L. Nicolais, W. Bonfield, G. Davis] Mechanical fatigue of bone leads to micro-cracking which is associated with remodeling, establishing a balance in the microcrack population of the living tissue, thus, in the steady-state, the microstructure of bone provides sites of discontinuity acting as stress raisers. Hence fracture toughness plays a decisive role in bone functionality by determining the level to which the material can be stressed in the presence of cracks, or, equivalently, the magnitude of cracking which can be tolerated at a given stress level. Cortical bone, which behaves as a quasi-brittle solid when fractured, was tested as short-rod chevron-notched tension specimens (CNT). The main features of the CNT specimen are its geometry and the V shaped notch. The notch leads to steady-state crack propagation whilst the requested geometry allows a diameter 40% smaller than the thickness of a standard compact tension specimens (CT). These features are essential to distinguish the inhomogeneties in the fracture properties of materials like bone. Bone structure and crack propagation of the CNT specimens were analyzed using X-ray computed micro-tomography (XMT), which is a non-invasive imaging technique. The unique feature of the micro-CT is the high resolution three-dimensional image which consists of multi-sliced tomographs taken in a fine pitch along the rotational axis. Fracture toughness (K IC) computed according to the peak load was 4.8 MNm-3/2 while that derived from experimental calibration tests using XMT was 4.9 MNm-3/2. Kluwer Academic Publishers, 2000 Santis R. Institute of Composite Materials Technology, National Research Council, and Interdisciplinary Research Centre in Biomaterials, University of Naples "Federico II”, Piazzale Tecchio 80, 80125, Napoli, Italy aut Anderson P. Department of Biophysics in Relation to Dentistry, Queen Mary and Westfield College, University of London, E1 4NS, London, U.K. aut Tanner K. Interdisciplinary Research Center in Biomedical Materials, Queen Mary and Westfield College, University of London, E1 4NS, London, U.K. aut Ambrosio L. Institute of Composite Materials Technology, National Research Council, and Interdisciplinary Research Centre in Biomaterials, University of Naples "Federico II”, Piazzale Tecchio 80, 80125, Napoli, Italy aut Nicolais L. Institute of Composite Materials Technology, National Research Council, and Interdisciplinary Research Centre in Biomaterials, University of Naples "Federico II”, Piazzale Tecchio 80, 80125, Napoli, Italy aut Bonfield W. Interdisciplinary Research Center in Biomedical Materials, Queen Mary and Westfield College, University of London, E1 4NS, London, U.K. aut Davis G. Department of Biophysics in Relation to Dentistry, Queen Mary and Westfield College, University of London, E1 4NS, London, U.K. aut Journal of Materials Science: Materials in Medicine Kluwer Academic Publishers 11/10(2000-10-01), 629-636 0957-4530 11:10<629 2000 11 10856 https://doi.org/10.1023/A:1008909830421 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1023/A:1008909830421 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Santis R. Institute of Composite Materials Technology, National Research Council, and Interdisciplinary Research Centre in Biomaterials, University of Naples "Federico II”, Piazzale Tecchio 80, 80125, Napoli, Italy aut NATIONALLICENCE 700 1- Anderson P. Department of Biophysics in Relation to Dentistry, Queen Mary and Westfield College, University of London, E1 4NS, London, U.K aut NATIONALLICENCE 700 1- Tanner K. Interdisciplinary Research Center in Biomedical Materials, Queen Mary and Westfield College, University of London, E1 4NS, London, U.K aut NATIONALLICENCE 700 1- Ambrosio L. Institute of Composite Materials Technology, National Research Council, and Interdisciplinary Research Centre in Biomaterials, University of Naples "Federico II”, Piazzale Tecchio 80, 80125, Napoli, Italy aut NATIONALLICENCE 700 1- Nicolais L. Institute of Composite Materials Technology, National Research Council, and Interdisciplinary Research Centre in Biomaterials, University of Naples "Federico II”, Piazzale Tecchio 80, 80125, Napoli, Italy aut NATIONALLICENCE 700 1- Bonfield W. Interdisciplinary Research Center in Biomedical Materials, Queen Mary and Westfield College, University of London, E1 4NS, London, U.K aut NATIONALLICENCE 700 1- Davis G. Department of Biophysics in Relation to Dentistry, Queen Mary and Westfield College, University of London, E1 4NS, London, U.K aut NATIONALLICENCE 773 0- Journal of Materials Science: Materials in Medicine Kluwer Academic Publishers 11/10(2000-10-01), 629-636 0957-4530 11:10<629 2000 11 10856 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer