Article (Scientific journals)
Re-entrant inclusions in cellular solids: From defects to reinforcements
Zorzetto, Laura; Ruffoni, Davide
2017In Composite Structures, 176, p. 195 - 204
Peer Reviewed verified by ORBi
 

Files


Full Text
022_2017_Zorzetto_CS.pdf
Author postprint (3.98 MB)
Request a copy
Annexes
Graphical_abstract_IIrev.png
(3.88 MB)
Graphical abstract
Download

All documents in ORBi are protected by a user license.

Send to



Details



Keywords :
Re-entrant inclusions; Cellular solids; Defects; Honeycombs; Negative Poisson ratio; Stiffness enhancement; Auxetic
Abstract :
[en] Abstract A contrast in Poisson ratio is a possible strategy to enhance the stiffness of composite structures. In solid materials Poisson ratio is hardly tailorable unless cellular architectures are considered. Here, we first investigated the effect of a single re-entrant inclusion acting as a defect into a regular (non-re-entrant) honeycomb lattice. Building on this, we generated regular patterns of re-entrant inclusions into a regular hexagonal cellular matrix and we characterized the apparent stiffness and Poisson ratio of the obtained structures. We also explored the role of the intrinsic material properties of the inclusion as well as of its closest environment on the interplay between the deformations of different phases in the lattice. Our main finding is that a small fraction of re-entrant inclusions (around 12%) is sufficient to generate a substantial augmentation in stiffness (300%) at constant overall relative density and without inducing strong anisotropy. Eventually, we fabricated by 3D polyjet printing bi-material composite architectures to demonstrate the superior mechanical behavior obtained exploiting the Poisson effect.
Disciplines :
Materials science & engineering
Author, co-author :
Zorzetto, Laura ;  Université de Liège > Département d'aérospatiale et mécanique > Mécanique des matériaux biologiques et bioinspirés
Ruffoni, Davide  ;  Université de Liège > Département d'aérospatiale et mécanique > Mécanique des matériaux biologiques et bioinspirés
Language :
English
Title :
Re-entrant inclusions in cellular solids: From defects to reinforcements
Publication date :
2017
Journal title :
Composite Structures
ISSN :
0263-8223
eISSN :
1879-1085
Publisher :
Elsevier Science
Volume :
176
Pages :
195 - 204
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 26 May 2017

Statistics


Number of views
117 (26 by ULiège)
Number of downloads
68 (4 by ULiège)

Scopus citations®
 
21
Scopus citations®
without self-citations
18
OpenCitations
 
20

Bibliography


Similar publications



Contact ORBi