Luxner Mathias H, Woesz Alexander, Stampfl Juergen, Fratzl Peter, Pettermann Heinz E
Institute of Lightweight Design and Structural Biomechanics, Vienna University of Technology, Vienna, Austria; Luxner Engineering ZT, Imst, Austria.
Acta Biomater. 2009 Jan;5(1):381-90. doi: 10.1016/j.actbio.2008.07.025. Epub 2008 Aug 3.
The susceptibility to deformation localization of simple cubic arrangements of struts, which are a simple approximation of the micro-architecture 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 elastic-plastic bulk material and large strain theory, and a methodology for the estimation of the degree of deformation localization is introduced.
对支柱简单立方排列的变形局部化敏感性进行了分析，支柱简单立方排列是松质骨微观结构的一种简单近似。研究了结构无序与变形局部化趋势之间的相关性，并从生物学角度讨论了其相关性。对规则和无序开孔结构的空间变形分布进行了系统研究。为此，采用了考虑弹塑性体材料和大应变理论的有限元模型，并引入了一种估计变形局部化程度的方法。
