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Updated: Dec 18, 2025
A Method to Estimate Cadaveric Femur Cortical Strains During Fracture Testing Using Digital Image Correlation
Published on: September 14, 2017
A method for fracture toughness measurement in trabecular bone using computed tomography, image correlation and
Liye Yan1, Ahmet Cinar1, Shaocheng Ma2
1Department of Materials, University of Oxford, Parks Road, Oxford, OX1 3PH, UK.
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.
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