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Micromechanical evaluation of cortical bone using in situ XCT indentation and digital volume correlation

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Micromechanical evaluation of cortical bone using in situ XCT indentation and digital volume correlation. / Karali, Aikaterina; Kao, Alex; Zekonyte, Jurgita; Blunn, Gordon William; Tozzi, Gianluca.

In: Journal of the Mechanical Behavior of Biomedical Materials, Vol. 115, 104298, 01.03.2021.

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Karali, Aikaterina ; Kao, Alex ; Zekonyte, Jurgita ; Blunn, Gordon William ; Tozzi, Gianluca. / Micromechanical evaluation of cortical bone using in situ XCT indentation and digital volume correlation. In: Journal of the Mechanical Behavior of Biomedical Materials. 2021 ; Vol. 115.

Bibtex

@article{ce27c0481afa4050a8488edb5aad40a2,
title = "Micromechanical evaluation of cortical bone using in situ XCT indentation and digital volume correlation",
abstract = "The overall mechanical behaviour of cortical bone is strongly dependant on its microstructure. X-ray computed tomography (XCT) has been widely used to identify the microstructural morphology of cortical tissue (i.e. pore network, Haversian and Volkmann{\textquoteright}s canals). However, the connection between microstructure and mechanics of cortical bone during plastic deformation is unclear. Hence, the purpose of this study is to provide an in-depth evaluation of the interplay of plastic strain building up in relation to changes in the canal network for cortical bone tissue. In situ step-wise XCT indentation was used to introduce a localised load on the surface of the tissue and digital volume correlation (DVC) was employed to assess the three-dimensional (3D) full-field plastic strain distribution in proximity of the indent. It was observed that regions adjacent to the imprint were under tensile strain, whereas the volume underneath experienced compressive strain. Canal loss and disruption was detected in regions of higher compressive strains exceeding -20000 με and crack formation occurred in specimens where Haversian canals were running parallel to the indentation tip. The results of this study outline the relationship between the micromechanical and structural behaviour of cortical bone during plastic deformation, providing information on cortical tissue fracture pathways.",
author = "Aikaterina Karali and Alex Kao and Jurgita Zekonyte and Blunn, {Gordon William} and Gianluca Tozzi",
year = "2021",
month = mar,
day = "1",
doi = "10.1016/j.jmbbm.2020.104298",
language = "English",
volume = "115",
journal = "Journal of the Mechanical Behavior of Biomedical Materials",
issn = "1751-6161",
publisher = "Elsevier BV",

}

RIS

TY - JOUR

T1 - Micromechanical evaluation of cortical bone using in situ XCT indentation and digital volume correlation

AU - Karali, Aikaterina

AU - Kao, Alex

AU - Zekonyte, Jurgita

AU - Blunn, Gordon William

AU - Tozzi, Gianluca

PY - 2021/3/1

Y1 - 2021/3/1

N2 - The overall mechanical behaviour of cortical bone is strongly dependant on its microstructure. X-ray computed tomography (XCT) has been widely used to identify the microstructural morphology of cortical tissue (i.e. pore network, Haversian and Volkmann’s canals). However, the connection between microstructure and mechanics of cortical bone during plastic deformation is unclear. Hence, the purpose of this study is to provide an in-depth evaluation of the interplay of plastic strain building up in relation to changes in the canal network for cortical bone tissue. In situ step-wise XCT indentation was used to introduce a localised load on the surface of the tissue and digital volume correlation (DVC) was employed to assess the three-dimensional (3D) full-field plastic strain distribution in proximity of the indent. It was observed that regions adjacent to the imprint were under tensile strain, whereas the volume underneath experienced compressive strain. Canal loss and disruption was detected in regions of higher compressive strains exceeding -20000 με and crack formation occurred in specimens where Haversian canals were running parallel to the indentation tip. The results of this study outline the relationship between the micromechanical and structural behaviour of cortical bone during plastic deformation, providing information on cortical tissue fracture pathways.

AB - The overall mechanical behaviour of cortical bone is strongly dependant on its microstructure. X-ray computed tomography (XCT) has been widely used to identify the microstructural morphology of cortical tissue (i.e. pore network, Haversian and Volkmann’s canals). However, the connection between microstructure and mechanics of cortical bone during plastic deformation is unclear. Hence, the purpose of this study is to provide an in-depth evaluation of the interplay of plastic strain building up in relation to changes in the canal network for cortical bone tissue. In situ step-wise XCT indentation was used to introduce a localised load on the surface of the tissue and digital volume correlation (DVC) was employed to assess the three-dimensional (3D) full-field plastic strain distribution in proximity of the indent. It was observed that regions adjacent to the imprint were under tensile strain, whereas the volume underneath experienced compressive strain. Canal loss and disruption was detected in regions of higher compressive strains exceeding -20000 με and crack formation occurred in specimens where Haversian canals were running parallel to the indentation tip. The results of this study outline the relationship between the micromechanical and structural behaviour of cortical bone during plastic deformation, providing information on cortical tissue fracture pathways.

U2 - 10.1016/j.jmbbm.2020.104298

DO - 10.1016/j.jmbbm.2020.104298

M3 - Article

VL - 115

JO - Journal of the Mechanical Behavior of Biomedical Materials

JF - Journal of the Mechanical Behavior of Biomedical Materials

SN - 1751-6161

M1 - 104298

ER -

ID: 25828231