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29. FrontMatter.

Author

Wong, Man-Chung, Dai, Ning-Yi, and Lam, Chi-Seng

Published
2016

31. Mechanical Properties and Design of Lattice Composites and Structures.

Author

Fang, Dai-Ning, Cui, Xiao-Dong, Zhang, Yi-Hui, and Zhao, Han

Abstract

Recently, lattice materials have been attractive for use as cores in light-weight sandwich panels, for energy-absorption and packaging applications, or as heat transfer devices. Lattice structure is a kind of periodic trusses patterned like moleculelattice. Usually there is no filling in the space between frames of those 2D or 3D constructions, thus sufficient quantity of mass can be reduced. The mechanical properties of 2D lattice materials have been discussed at length, including the stiffness, yield, buckling, impact behavior, and etc. [1–3yyeld and fracture are major structural collapse modes for the lattice structures, a comprehensive understanding of their yielding and fracture behaviors are indispensable for engineering applications. Deshpande et al. [6] analyzed the elastic properties, plastic yielding and elastic buckling surfaces of octet truss structure. Zhang et al. [7] designed two novel statically indeterminate planar lattice structures, the SI-square and N-Kagome lattice structures (see Fig. 1), calculated their initial yield surfaces, and veri.ed their special mechanical properties. Recent work by Fleck et al. [8] predicts the fracture toughness of three 2D lattice materials, and it reveals that the Kagome has an elevated macroscopic toughness by a characteristic elastic zone near the crack tip to release the stress in quasi-static state. [ABSTRACT FROM AUTHOR]

Published
2009
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