Characterization of cuttlebone for a biomimetic design of cellular structures  

作　　者：Joseph Cadman Shiwei Zhou Yuhang Chen Wei Li Richard Appleyard Qing Li 

机构地区：[1]School of Aerospace, Mechanical and Mechatronic Engineering,The University of Sydney, Sydney, NSW 2006, Australia [2]Faculty of Medicine, The University of Sydney, SydneyNSW 2006, Australia

出　　处：《Acta Mechanica Sinica》2010年第1期27-35,共9页力学学报（英文版）

基　　金：supported by Australian Research Council Discovery Project grant

摘　　要：Cuttlebone is a natural material possessing the multifunctional properties of high porosity, high flexural stiffness and compressive strength, making it a fine example of design optimization of cellular structures created by nature. Examination of cuttlebone using scanning electron micros- copy （SEM） reveals an approximately periodic microstruc- ture, appropriate for computational characterization using direct homogenization techniques. In this paper, volume fractions and stiffness tensors were determined based on two different unit cell models that were extracted from two different cuttlefish samples. These characterized results were then used as the target values in an inverse homogenization procedure aiming to re-generate microstructures with the same properties as cuttlebone. Unit cells with similar topologies to the original cuttlebone unit cells were achieved, attaining the same volume fraction （i.e. bulk density） and the same （or very close） stiffness tensor. In addition, a range of alternate unit cell topologies were achieved also attaining the target properties, revealing the non-unique nature of this inverse homogenization problem.Cuttlebone is a natural material possessing the multifunctional properties of high porosity, high flexural stiffness and compressive strength, making it a fine example of design optimization of cellular structures created by nature. Examination of cuttlebone using scanning electron micros- copy （SEM） reveals an approximately periodic microstruc- ture, appropriate for computational characterization using direct homogenization techniques. In this paper, volume fractions and stiffness tensors were determined based on two different unit cell models that were extracted from two different cuttlefish samples. These characterized results were then used as the target values in an inverse homogenization procedure aiming to re-generate microstructures with the same properties as cuttlebone. Unit cells with similar topologies to the original cuttlebone unit cells were achieved, attaining the same volume fraction （i.e. bulk density） and the same （or very close） stiffness tensor. In addition, a range of alternate unit cell topologies were achieved also attaining the target properties, revealing the non-unique nature of this inverse homogenization problem.

关 键 词：Inverse homogenization - Cuttlebone microstructure Topology optimization Scanning electronic microscopy （SEM） 

分 类 号：Q811[生物学—生物工程]