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

DOI: 10.1016/j.jmbbm.2020.103838 DOI Help

Authors: Liye Yan (University of Oxford) , A. F. Cinar (University of Sheffield) , Shaocheng Ma (Imperial College London) , Richard Abel (Imperial College, London) , Ulrich Hansen (Imperial College London) , Thomas Marrow (University of Oxford)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Journal Of The Mechanical Behavior Of Biomedical Materials , VOL 109

State: Published (Approved)
Published: September 2020
Diamond Proposal Number(s): 11204

Abstract: 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.

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

Subject Areas: Biology and Bio-materials, Technique Development

Instruments: I12-JEEP: Joint Engineering, Environmental and Processing