Zero Poisson’s Ratio Honeycomb Structures-An FEA Study

Imran Ali; Jing Jun Yu

doi:10.4028/www.scientific.net/AMM.446-447.329

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 446-447Zero Poisson’s Ratio Honeycomb Structures-An FEA...

Zero Poisson’s Ratio Honeycomb Structures-An FEA Study

Abstract:

Conventional honeycomb structures show positive Poissons ratio under in-plane loading while Auxetic honeycombs show negative Poissons ratio. Accordion, Hybrid and Semi re-entrant honeycomb structures show zero Poissons ratio, i.e. they show zero or negligible deformation in lateral direction under longitudinal loadings. In this paper an FEA analysis of these three types of structures is made using commercial software ANSYS^R 14 using 8 node 281 shell elements. Cell wall thickness and cell angle is varied to analyze their effect on elastic modulus E_x and global strains along X direction under X-direction loadings. E_y is also analyzed to measure lateral stiffness and deformation behavior of structure for its potential application as flexures.

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Periodical:

Applied Mechanics and Materials (Volumes 446-447)

Pages:

329-334

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.446-447.329

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Online since:

November 2013

Authors:

Imran Ali, Jing Jun Yu

Keywords:

Accordion, Auxetic Honeycomb Structures, Hybrid, Poisson's Ratio, Semi Re-Entrant Structures

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