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Size-Dependent and Tunable Elastic and Geometric Properties of Hierarchical Nano-Porous Materials

Zhu, Hanxing and Wang, Z. B. 2013. Size-Dependent and Tunable Elastic and Geometric Properties of Hierarchical Nano-Porous Materials. Science of Advanced Materials 5 (6) , pp. 677-686. 10.1166/sam.2013.1503

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Abstract

Simple closed form results for all the elastic constants of the first order nano-sized hexagonal honeycombs and body-centred-cubic (BCC) open-celled foams, and their self-similar hierarchical cellular materials are obtained in this paper. It is found that if the cell wall/strut thickness of the first order honeycomb or open-celled foam is at the nano-meter scale, the elastic properties of the hierarchical porous materials are not only size-dependent owing to the surface elasticity effects, but also tunable because the amplitude of the initial surface stress/strain is adjustable and controllable. In addition, the cell diameter, cross-sectional area and volume, the total surface area and the electric capacitance of the nano-structured hierarchical honeycombs and open-celled foams can be controlled to vary over a large range. What is more, if the surface modulus of the solid material is negative, a nano-structured hierarchical cellular material could possibly be controlled to collapse automatically.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Engineering
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
Uncontrolled Keywords: Structural hierarchy; Size Effects; Mechanical Properties; Surface Effects; Initial Stress
Publisher: American Scientific Publishers
ISSN: 1947-2935
Last Modified: 04 Jun 2017 05:10
URI: http://orca.cf.ac.uk/id/eprint/49113

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