CUED Publications database

Stiffness and strength of tridimensional periodic lattices

Vigliotti, A and Pasini, D (2012) Stiffness and strength of tridimensional periodic lattices. Computer Methods in Applied Mechanics and Engineering, 229-23. pp. 27-43. ISSN 0045-7825

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Abstract

This paper presents a method for the linear analysis of the stiffness and strength of open and closed cell lattices with arbitrary topology. The method hinges on a multiscale approach that separates the analysis of the lattice in two scales. At the macroscopic level, the lattice is considered as a uniform material; at the microscopic scale, on the other hand, the cell microstructure is modelled in detail by means of an in-house finite element solver. The method allows determine the macroscopic stiffness, the internal forces in the edges and walls of the lattice, as well as the global periodic buckling loads, along with their buckling modes. Four cube-based lattices and nine cell topologies derived by Archimedean polyhedra are studied. Several of them are characterized here for the first time with a particular attention on the role that the cell wall plays on the stiffness and strength properties. The method, automated in a computational routine, has been used to develop material property charts that help to gain insight into the performance of the lattices under investigation. © 2012 Elsevier B.V.

Item Type: Article
Uncontrolled Keywords: Lattice materials Material property charts Multiscale mechanics Periodic buckling Periodic cellular materials Stiffness and strength properties
Subjects: UNSPECIFIED
Divisions: Div C > Materials Engineering
Div C > Applied Mechanics
Depositing User: Cron Job
Date Deposited: 07 Mar 2014 11:29
Last Modified: 16 Dec 2014 19:05
DOI: 10.1016/j.cma.2012.03.018