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Micro-finite element simulation of trabecular-bone post-yield behaviour – effects of material model, element size and type

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  • E. Verhulp
  • B. Van Rietbergen
  • R. Müller
  • R. Huiskes

Abstract

Micro-finite element (micro-FE) analysis became a standard tool for the evaluation of trabecular bone mechanical properties. The accuracy of micro-FE models for linear analyses is well established. However, the accuracy of recently developed nonlinear micro-FE models for simulations of trabecular bone failure is not known. In this study, a trabecular bone specimen was compressed beyond the apparent yield point. The experiment was simulated using different micro-FE meshes with different element sizes and types, and material models based on cortical bone. The results from the simulations were compared with experimental results to study the effects of the different element and material models. It was found that a decrease in element size from 80 to 40 μm had little effect on predicted post-yield behaviour. Element type and material model had significant effects. Nevertheless, none of the established material models for cortical bone were able to predict the typical descent in the load-displacement curve seen during compression of trabecular bone.

Suggested Citation

  • E. Verhulp & B. Van Rietbergen & R. Müller & R. Huiskes, 2008. "Micro-finite element simulation of trabecular-bone post-yield behaviour – effects of material model, element size and type," Computer Methods in Biomechanics and Biomedical Engineering, Taylor & Francis Journals, vol. 11(4), pages 389-395.
    • Handle: RePEc:taf:gcmbxx:v:11:y:2008:i:4:p:389-395
    DOI: 10.1080/10255840701848756
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    Cited by:

    1. Lars Ole Schwen & Uwe Wolfram, 2014. "Validation of composite finite elements efficiently simulating elasticity of trabecular bone," Computer Methods in Biomechanics and Biomedical Engineering, Taylor & Francis Journals, vol. 17(6), pages 652-660, April.
    2. Alexander Tsouknidas & Georgios Maliaris & Savvas Savvakis & Nikolaos Michailidis, 2015. "Anisotropic post-yield response of cancellous bone simulated by stress–strain curves of bulk equivalent structures," Computer Methods in Biomechanics and Biomedical Engineering, Taylor & Francis Journals, vol. 18(8), pages 839-846, June.
    3. Andrew P. Baumann & Xiutao Shi & Ryan K. Roeder & Glen L. Niebur, 2016. "The sensitivity of nonlinear computational models of trabecular bone to tissue level constitutive model," Computer Methods in Biomechanics and Biomedical Engineering, Taylor & Francis Journals, vol. 19(5), pages 465-473, April.
    4. S. J. Ramos-Infante & M. A. Pérez, 2017. "and characterization of open-cell structures of trabecular bone," Computer Methods in Biomechanics and Biomedical Engineering, Taylor & Francis Journals, vol. 20(14), pages 1562-1570, October.

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