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A Multiscale Approach to Assess the Effect of Multilevel Structuring on the Properties of Hierarchical Lattice Materials

Published online by Cambridge University Press:  16 March 2012

Andrea Vigliotti  and
Damiano Pasini
Andrea Vigliotti
Affiliation:
Department of Mechanical Engineering - McGill University 817 Sherbrooke Street West, Montreal, QC
Damiano Pasini
Affiliation:
Department of Mechanical Engineering - McGill University 817 Sherbrooke Street West, Montreal, QC
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Abstract

Natural materials have often a defined multilevel hierarchy which governs their macroscopic mechanical properties. Cork, sponge and bone are only a few examples. These materials are generally heterogeneous and can exhibit a cellular pattern, i.e. a partition of a solid with voids, at multiple levels of the structural hierarchy. It is well known that the arrangement of the voids plays a major role in the overall performance of the material. Furthermore, it has been demonstrated that the nesting of cellular patterns at different levels confers remarkable mechanical properties to the structure.

This paper presents a multiscale approach to the analysis of a hierarchical structure which exhibits nested levels of lattice, i.e. regular periodic patterns of voids occur at different length scales. A number of three-dimensional topologies as well as the effect of lattice geometry parameters have been investigated. The results of the analysis are plotted onto material property charts. The visualization of the properties helps gain insight into the contribution that each hierarchical layer imparts to the overall properties of a component hierarchically structured with lattice materials.

Keywords

cellular (material type)microstructurebiomimetic (assembly)
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1420: Symposium OO – Multiscale Mechanics of Hierarchical Materials , 2012 , mrsf11-1420-oo02-04
Copyright
Copyright © Materials Research Society 2012

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References

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