A method for fracture toughness measurement in trabecular bone using computed tomography, image correlation and finite element methods. (September 2020)

• Record Type: Journal Article
• Authors: Yan, Liye; Cinar, Ahmet; Ma, Shaocheng; Abel, Richard; Hansen, Ulrich; Marrow, Thomas James
• Is Part Of: Journal of the mechanical behavior of biomedical materials. Volume 109(2020)
• Publication Date: 2020-09
• Subjects: Trabecular bone -- Crack measurement -- Fracture toughness -- Computed X-ray tomography -- Digital volume correlation; Biomedical materials -- Periodicals; Biomedical materials -- Mechanical properties -- Periodicals; Biomedical materials; Biomedical materials -- Mechanical properties; Periodicals; Electronic journals; 610.28
• DOI: 10.1016/j.jmbbm.2020.103838
• Languages: English
• ISSNs: 1751-6161

Abstract

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.