The aim of the present study is to compare the results from subject-specific finite element analysis (FEA) of a human femur to experimental measurements, using two different methods for assigning material properties to the FE models. A modified material mapping strategy allowing for spatial variation of material properties within the elements and Young's modulus surface corrections is presented and compared to a more conventional strategy, whereby constant material properties are assigned to each element. The accuracy of the superficial stress-strain predictions was evaluated against experimental results from 13 strain gauges and five different load cases. Both methods predicted stresses with acceptable accuracy (R2 = 0.92, root mean square error, RMSE < 10%), with the conventional method performing slightly better. The modified method performed better in strain prediction (R2 = 0.85, RMSE = 23% versus R2 = 0.79, RMSE = 31%). © 2007 IPEM.
CITATION STYLE
Helgason, B., Taddei, F., Pálsson, H., Schileo, E., Cristofolini, L., Viceconti, M., & Brynjólfsson, S. (2008). A modified method for assigning material properties to FE models of bones. Medical Engineering and Physics, 30(4), 444–453. https://doi.org/10.1016/j.medengphy.2007.05.006
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