This work illustrates the manufacturing and tensile testing of a novel concept of honeycomb structures with hexagonal and auxetic (negative Poisson’s ratio) topology, made of shape memory alloy (SMA) core material. The honeycombs are manufactured using Nitinol ribbons having 6.40 mm of width and 0.2 mm of thickness. The ribbons were inserted in a special dye using cyanoacrilate to bond the longitudinal strips of the unit cells. The ribbons were subjected to tensile test at room temperature (martensite finish) and austenite finish temperature. Tensile tests at room temperature were performed on the honeycomb. The stress-strain curve obtained from the test on a single ribbon at room temperature was then used to develop nonlinear Finite Element beam elements using a commercial code. The beam elements were then used to model the honeycomb samples under tensile loading. Good agreement is observed between numerical nonlinear simulations and the experimental results.

1.
Alderson
K. L.
,
Alderson
A.
and
Evans
K. E.
1997
,
Journal of Strain Analysis
,
32
(
3
):
201
212
2.
Allen, H.G. 1969. Analysis and Design of Structural Sandwich Panels. Pergamon Press, Oxford.
3.
ANSYS Rel. 7.1 User’s Manual, 2003. Canongsburg, PA.
4.
Brinson
L. C.
1993
.
Journal of Intelligent Material System and Structures
4
(
2
):
229
242
.
5.
Bullough, W. A. and Scarpa, F. 2005. International Journal of Modern Physics Part B. In press.
6.
EPSRC Report, 2005. ISBN 1-904425-48-8.
7.
Evans
K. E.
1991
.
Endeavour, New Series
,
15
(
4
):
170
174
.
8.
Gibson, L. J. and Ashby, M. F. 1997. Cellular Solids - structure and properties. 2nd Edition, Cambridge Press, Cambridge, UK.
9.
Hassan
M. R.
,
Scarpa
F.
and
Mohammed
N. A.
2004
,
Proceedings of SPIE
,
5327
:
557
564
.
10.
Janocha, H. (Ed.). 1999. Adaptronics and Smart Structures: Basics, Materials, Design and Applications. Berlin, Springer.
11.
Lakes
R. S.
1993
.
ASME Journal of Mechanical Design
115
:
696
700
.
12.
Lakes
R. S.
and
Elms
K.
1993
.
Journal of Composite Materials
,
27
:
1193
1202
.
13.
Renji
K.
,
Nair
P. S.
and
Narayanan
S.
1996
.
Journal of Sound and Vibration
,
195
,
687
699
.
14.
Ruzzene
M.
and
Scarpa
F.
2003
.
Journal of Intelligent Material Systems and Structures.
14
(
7
):
443
453
.
15.
Scarpa
F.
and
Tomlin
P. J.
2000
.
Fatigue and Fracture in Engineering Materials and Structures
23
:
717
720
.
16.
Scarpa
F.
,
Bullough
W. A.
and
Lumley
P.
2004
.
Proceedings of the IMechE Part C - Journal of Mechanical Engineering Science
,
218
:
1
4
.
17.
Scarpa
F.
,
Panayiotou
P.
and
Tomlinson
G.
2000
.
Journal of Strain Analysis and Engineering Design
,
35
(
5
):
383
388
.
18.
Silva
M. J.
,
Hayes
W. C.
and
Gibson
L. J.
1995
.
International Journal of Mechanical Sciences
,
11
:
116
1177
.
19.
Smith
F. C.
and
Scarpa
F.
2000
.
IEEE Microwave and Guided Wave Letters
10
(
11
):
451
453
.
20.
Wan
H.
,
Ohtaki
H.
,
Kotosaka
S.
and
Hu
G.
2004
.
European Journal of Mechanics A/Solids
23
:
95
106
.
21.
Yong
L.
,
2003
.
Materials Science and Engineering
,
354
(
1–2
):
286
291
.
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