Titolo:  Static and Modal Analysis of Low Porosity Thin Metallic Auxetic Structures Using Speckle Interferometry and Digital Image Correlation
Data di pubblicazione:  2018
Data di prima pubblicazione on-line:  2017
Autori: 
Autori:  Francesconi, L.; Taylor, M.; Bertoldi, K.; Baldi, A.
Numero degli autori:  4
Lingua:  Inglese
Presenza coautori internazionali: 
Rivista:  EXPERIMENTAL MECHANICS
Volume:  58
Fascicolo:  2
Pagina iniziale:  283
Pagina finale:  300
Numero di pagine:  18
Digital Object Identifier (DOI):  http://dx.doi.org/10.1007/s11340-017-0345-4
Codice identificativo Scopus:  2-s2.0-85030725357
Codice identificativo ISI:  WOS:000423584800007
URL:  http://www.springer.com/dal/home/generic/search/results?SGWID=1-40109-70-36417762-0
Abstract:  This study presents an evaluation of the static and dynamic mechanical behavior of low porosity, ductile two-dimensional auxetic metamaterials. The full in-plane displacement fields and the eigenmodes of different geometric structures were investigated and compared with finite element simulations using speckle interferometry and digital image correlation. The results showed strong agreement, validating the theoretical approach used and establishing a method for testing and quantitatively assessing the performance of negative Poisson ratio structures, and metamaterials in general, for different purposes and fields. The findings of this study also increase our knowledge of elastic instabilities in metallic auxetic structures, with further applications in several engineering fields that can benefit from combining the qualities of ductile materials with additional features typical of these smart structures.
Parole chiave:  Auxetic; Digital image correlation; Finite elements; Modal analysis; Speckle interferometry; Vibration; Aerospace Engineering; Mechanics of Materials; Mechanical Engineering
Tipologia: 1.1 Articolo in rivista

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