A continuum-based model is developed for the octet-truss unit cell in order to describe the effective mechanical properties (elastic modulus) of the lattice structure. This model is to include different geometric parameters that impact the structural effects; these parameters are: lattice angle, loading direction, thickness to diameter ratio, diameter to length ratio, and ellipticity. All these geometric parameters are included in the stiffness matrix, and the impact of each parameter on the stiffness tensor is investigated. Specifically, the effect of the lattice angle on the elastic moduli is discussed, and the loading direction of the highest elastic modulus is investigated for different lattice angles. Furthermore, the Gurtin-Murdoch model of surface elasticity is used to include the size effect in the stiffness tensor, as well as anisotropy of this model is investigated.
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ASME 2016 International Mechanical Engineering Congress and Exposition
November 11–17, 2016
Phoenix, Arizona, USA
Conference Sponsors:
- ASME
ISBN:
978-0-7918-5063-3
PROCEEDINGS PAPER
On the Effective Properties of 3D Metamaterials
Mohamed Abdelhamid,
Mohamed Abdelhamid
York University, Toronto, ON, Canada
Search for other works by this author on:
Aleksander Czekanski
Aleksander Czekanski
York University, Toronto, ON, Canada
Search for other works by this author on:
Mohamed Abdelhamid
York University, Toronto, ON, Canada
Aleksander Czekanski
York University, Toronto, ON, Canada
Paper No:
IMECE2016-67407, V009T12A062; 8 pages
Published Online:
February 8, 2017
Citation
Abdelhamid, M, & Czekanski, A. "On the Effective Properties of 3D Metamaterials." Proceedings of the ASME 2016 International Mechanical Engineering Congress and Exposition. Volume 9: Mechanics of Solids, Structures and Fluids; NDE, Diagnosis, and Prognosis. Phoenix, Arizona, USA. November 11–17, 2016. V009T12A062. ASME. https://doi.org/10.1115/IMECE2016-67407
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