A method for fracture toughness measurement in trabecular bone using computed tomography, image correlation and finite element methods

Yan, Liye; Cinar, Ahmet; Ma, Shaocheng; Abel, Richard; Hansen, Ulrich; Marrow, Thomas James

Affiliations

¹Department of Materials, University of Oxford, Parks Road, Oxford, OX1 3PH, UK

²MSk Laboratory, Department of Surgery and Cancer, Faculty of Medicine, Imperial College, London, SW7 2AZ, UK

³Mechanical Engineering Department, Imperial College London, SW7 2AZ, UK

Abstract and keywords

The fracture resistance of load-bearing trabecular bone is adversely affected by diseases such as osteoporosis. However, there are few published measurements of trabecular bone fracture toughness due to the difficulty of conducting reliable tests in small specimens of this highly porous material. A new approach is demonstrated that uses digital volume correlation of X-ray computed tomographs to measure 3D displacement fields in which the crack shape and size can be objectively identified using a phase congruency analysis. The criteria for crack propagation, i.e. fracture toughness, can then be derived by finite element simulation, with knowledge of the elastic properties.

Keywords: Trabecular bone; Crack measurement; Fracture toughness; Computed X-ray tomography; Digital volume correlation

Links

DOI: 10.1016/j.jmbbm.2020.103838

PubMed: 32543404

WoS: 000563527900010

History

Received: 2019-10-11

Revised: 2020-02-21

Accepted: 2020-04-26

Online: 2020-05-01

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Cited By (1)

Year	Entry
2022	Dall’Ara E, Bodey AJ, Isaksson H, Tozzi G. A practical guide for in situ mechanical testing of musculoskeletal tissues using synchrotron tomography. J Mech Behav Biomed Mater. September 2022;133:105297.