Multi-scale cohesive laws in hierarchical materials

Mechanical Engineering Applied Mathematics Gecko Biological materials 02 engineering and technology Hierarchical materials Flaw tolerance Condensed Matter Physics Fracture Materials Science(all) Mechanics of Materials Modelling and Simulation Adhesion Bone 0210 nano-technology
DOI: 10.1016/j.ijsolstr.2007.06.007 Publication Date: 2007-06-16T10:11:17Z
ABSTRACT
AbstractMotivated by the observations that natural materials such as bone, shell, tendon and the attachment system of gecko exhibit multi-scale hierarchical structures, this paper aims to develop a better understanding of the effects of structural hierarchy on flaw insensibility of materials from the viewpoint of multi-scale cohesive laws. We consider two idealized, self-similar models of hierarchical materials, one mimicking gecko’s attachment system and the other mimicking the mineral–protein composite structure of bone, to demonstrate that structural hierarchy leads to multi-scale cohesive laws which can be designed from bottom up to enable flaw tolerance from nanoscale to macroscopic length scales.
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