Acta Biomater. 5, 381-390

A FINITE ELEMENT STUDY ON THE EFFECTS OF DISORDER IN CELLULAR MATERIALS

M. Luxner1,2, A. Woesz3,4, J. Stampfl5, P. Fratzl3, H.E. Pettermann1

1Institute of Lightweight Design and Structural Biomechanics,
TU Wien, Vienna, Austria
2Luxner Engineering ZT, Imst, Austria
3Department of Biomaterials,
Max Planck Institute of Colloids and Interfaces, Potsdam, Germany
4Cambridge Centre for Medidcal Materials,
University of Cambridge, Cambridge, UK
5Institute of Materials Science and Technology,
TU Wien, Vienna, Austria


Abstract - The susceptibility to deformation localization of simple cubic arrangements of struts, which are a simple approximation of the microarchitecture in cancellous bone, is analyzed. The coherence between structural disorder and the tendency towards deformation localization is investigated and its relevance from a biological point of view is discussed. A systematic study on the spatial deformation distribution of regular and disordered open cell structures is carried out. To this end, finite element models are employed which account for elasticplastic bulk material and large strain theory, and a methodology for the estimation of the degree of deformation localization is introduced.


(hjb,081124)