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Computational material design for acoustic cloaking

Author
Mendez, C.; Podestá, J.; Lloberas-Valls, O.; Toro, S.; Huespe, A.; Oliver, J.
Type of activity
Journal article
Journal
International journal for numerical methods in engineering
Date of publication
2017-12
Volume
112
Number
10
First page
1353
Last page
1380
DOI
https://doi.org/10.1002/nme.5560 Open in new window
Project funding
COMP-DES-MAT (Advanced tools for computational design of engineering materials)
Repository
http://hdl.handle.net/2117/110986 Open in new window
URL
http://onlinelibrary.wiley.com/doi/10.1002/nme.5560/abstract Open in new window
Abstract
A topology optimization technique based on the topological derivative and the level set function is utilized to design/synthesize the micro-structure of a pentamode material for an acoustic cloaking device. The technique provides a micro-structure consisting of a honeycomb lattice composed of needle-like and joint members. The resulting metamaterial shows a highly anisotropic elastic response with effective properties displaying a ratio between bulk and shear moduli of almost 3 orders of magnitu...
Citation
Mendez, C., Podestá, J., Lloberas-Valls, O., Toro, S., Huespe, A., Oliver, J. Computational material design for acoustic cloaking. "International journal for numerical methods in engineering", Desembre 2017, vol. 112, núm. 10, p. 1353-1380.
Keywords
COMP-DES-MAT Project, COMPDESMAT Project, acoustic cloak, extremal material, pentamode material, topological derivative, topology optimization, transformation acoustic applications
Group of research
(MC)2 - UPC Computational continuum mechanics
RMEE - Strength of Materials and Structural Engineering Research Group

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