A nonlinear micromechanical model for progressive damage of vertebral trabecular bones

Eyass Massarwa, Jacob Aboudi, Fabio Galbusera, Hans Joachim Wilke, Rami Haj-Ali

Research output: Contribution to journalArticlepeer-review

Abstract

A new three-dimensional (3D) nonlinear micromechanical analysis is proposed to predict the overall mechanical response to damage evolution of the vertebral trabecular bone (VTB) highly porous microstructure. Towards that goal, a nonlinear micromechanical model, based on the 3D parametric high fidelity generalized method of cells (HFGMC) micromechanics, is extended to include progressive damage. The damage is initiated at the local subcell and its evolution is carried out using a strain-softening method. The nonlinear HFGMC behavior including damage evolution is first verified by examining its ability to predict the experimental nonlinear compression stress-strain response of printed polymeric VTB highly porous microstructure. Next, predicted HFGMC pre- and postultimate failure for native VTB representative unit cells (RUCs) harvested from different vertebrae of human cadavers (n = 10) are carried out. Some of the latter predictions were compared to reported values found in the literature. The proposed nonlinear HFGMC micromechanical model with evolving damage can predict the overall nonlinear behavior, including postultimate range.

Original languageEnglish
Pages (from-to)407-424
Number of pages18
JournalJournal of Mechanics of Materials and Structures
Volume12
Issue number4
DOIs
StatePublished - 2017

Keywords

  • HFGMC
  • Micromechanics
  • Overall mechanical behavior
  • Progressive damage
  • Vertebral trabecular bone

Fingerprint

Dive into the research topics of 'A nonlinear micromechanical model for progressive damage of vertebral trabecular bones'. Together they form a unique fingerprint.

Cite this