会议专题

THE ROLE OF HIERARCHY IN FRACTURE TOUGHNESS

Hierarchy is common in biological materials and structures,but hardly at all present in technical materials and of very low priority in structures.Different levels of organisation within the structure can be separated from each other bycontrolling the interfaces between them,accentuating the different properties contributed at different size levels.Mostimportant,stiffness can be separated from resistance to damage,giving rise to stiff ceramic materials such as bone andnacre,which nevertheless have very respectable toughness,higher than man-made ceramic composites of comparablestiffness.Controlled hierarchical porosity is a major factor in the ability of wood to support high loads safely.Theremay be simpler ways for man to introduce hierarchical structures than to follow the biological processes of selfassembly.

J.F.V.Vincent

Centre for Biomimeties & Natural Technologies Department of Mechanical Engineering,University of BathBA2 7AY-Bath-United Kingdom

国际会议

International Symposium on Nature-Inspired Technology 2008 & International Symposium on Intelligent Unmanned Systems 2008(国际仿生科学会议暨智能无人系统国际研讨会)

南京

英文

1-6

2008-10-01(万方平台首次上网日期,不代表论文的发表时间)