Experimental verification of the relationships between Young's modulus and bone density using DIC

摘要

The paper presents the methodology of prediction of mechanical properties of trabecular bone based on the X-ray microtomography and the relationships between bone density and mechanical properties. Five relationships between bone density and Young's modulus available in the literature were selected for the tests (Carter and Hayes, Ciarelli et al., Kaneko et al., Keller and Li and Aspden). Twelve cubic specimens of the trabecular bone from femoral heads were cut out and X-ray Microtomography (XMT) scanned. The mechanical compression tests were performed on these specimens with the displacement and strain full field measurements using Digital Image Correlation (DIC) method. On the base of the XMT scans numerical models of tested specimens were generated and numerically tested by the simulation of the compression test using the finite element method. The results of the experimental tests and results of numerical analyses were compared.