Abstract

The wrinkling, or skin buckling, behavior of sandwich panels with skins consisting of equally spaced strips was investigated. These so-called zebra skin sandwiches proved to be superior to full skin sandwiches in terms of weight and wrinkling strength. Two and three-dimensional finite element analyses were performed and the full skin sandwich results were compared to various results in the open literature. An approximate analytical estimate, using Euler-Bernoulli kinematics in the skin and a simple exponentially decaying field in the core, was derived and compared with finite element results.

Issue Section:
Research Papers
Keywords:
sandwich, skin strips, grid skins, wrinkling, finite element method

References

1.
Gough
,
G. S.
,
Elam
,
C. F.
, and
de Bruyne
,
N. A.
, “
The Stabilization of a Thin Sheet by a Continuous Supporting Medium
,”
Journal of Royal Aero. Soc.
, Vol.
44
,
1940
, pp.
12
-
43
.
2.
Hoff
,
N. J.
,
Mautner
,
S. E.
, “
The Buckling of Sandwich-Type Panels
,”
Journal of Aero. Sciences
, Vol.
12
,
1945
, pp.
285
-
297
.
Google Scholar
Crossref
Search ADS
 
3.
Benson
,
A. S.
 and
Mayers
,
J.
, “
General Instability and Face Wrinkling of Sandwich Plates- Unified Theory and Applications
,”
AIAA J
, Vol.
5
, No.
4
,
1967
, pp.
729
-
739
.
Google Scholar
Crossref
Search ADS
 
4.
Hadi
,
B. K.
 and
Matthews
,
F. L.
, “
Development of Benson-Mayers Theory on the Wrinkling of Anisotropic Sandwich Panels
,”
Composite Structures
, Vol.
49
,
2000
, pp.
425
-
434
.
Google Scholar
Crossref
Search ADS
 
5.
Hadi
,
B. K.
, “
Wrinkling of Sandwich Column: Comparison Between Finite Element Analysis and Analytical Solutions
,”
Composite Structures
, Vol.
53
,
2001
, pp.
477
-
482
.
Google Scholar
Crossref
Search ADS
 
6.
Ley
,
R. P
,
Lin
,
W.
, and
Mbanefo
,
U.
, “
Facesheet Wrinkling in Sandwich Structures
,”
NASA
,
1999
, CR-1999-208994.
7.
Shield
,
T. W.
,
Kim
,
K. S.
, and
Shield
,
R. T.
, “
The Buckling of an Elastic Layer Bonded to an Elastic Substrate in Plane Strain
,”
Journal of Applied Mechanics
 0021-8936,
06
1994
, Vol.
61
, pp.
231
-
235
.
Google Scholar
Crossref
Search ADS
 
8.
Grenestedt
,
J. L.
 and
Olsson
,
K.-A.
, “
Wrinkling of Sandwich with Layered Core or Non-Symmetric Skins
,”
Proc. Third International Conference on Sandwich Construction
,
Southampton, UK
, 12–15 September 1995.
9.
Danielsson
,
M.
 and
Grenestedt
,
J. L.
, “
Gradient Foam Core Materials for Sandwich Structures, Preparation and Characterisation
,,”
Composites Part A
, Vol.
29
,
1998
, pp.
981
-
988
.
Google Scholar
Crossref
Search ADS
 
10.
ANSYS Inc.
 
Theory -Release 5.7
,
1994
,
Ansys Inc. Southpointe
,
275 Technology Drive, Canonsburg, PA, 15317
.
11.
Hill
,
R.
, “
On Uniqueness and Stability in the Theory of Finite Elastic Strains
,”
J. Mech. Phys. Solids
 0022-5096 https://doi.org/10.1016/0022-5096(57)90016-9, Vol.
5
,
1957
, pp.
229
-
241
.
Google Scholar
Crossref
Search ADS
 
12.
Hill
,
R.
, “
Eigenmodal Deformations in Elastic/Plastic Continua
,”
J. Mech. Phys. Solids
 0022-5096 https://doi.org/10.1016/0022-5096(67)90009-9, Vol.
15
,
1967
, pp.
371
-
386
.
Google Scholar
Crossref
Search ADS
 
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