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ASTM Selected Technical Papers
Composite Materials: Testing and Design: Twelfth Volume
By
RB Deo
RB Deo
1
Northrop Corporation
,
Hawthorne, CA 90250
;
symposium cochairman and coeditor
.
Search for other works by this author on:
CR Saff
CR Saff
2
McDouglas Douglas Corporation
,
St. Louis, MO 63165
;
symposium cochairman and coeditor
.
Search for other works by this author on:
ISBN-10:
0-8031-2404-X
ISBN:
978-0-8031-2404-2
No. of Pages:
429
Publisher:
ASTM International
Publication date:
1996

Elastically tailored composite laminates are those laminates that have been designed with specifically tailored stiffness parameters. These parameters can be sized to give an out-of-plane response to in-plane loading, resulting in deformation modes not found in conventional homogeneous materials.

Three different methods of testing extension-twist-coupled specimens are discussed. The benefits and limitations of each of the methods are highlighted. Quantitative results for each of the testing methods using a hygrothermally stable specimen are shown and compared to determine the applicability and suitability of each of the methods.

A comparison of data with predictions from a shear deformation sublaminate plate theory and finite element method (FEM) is presented.

1.
Chandra
,
R.
,
Stemple
,
A. D.
, and
Chopra
,
I.
, “
Thin Walled Composite Beams Under Bending, Torsional, and Extensional Load
,”
Journal of Aircraft
, Vol.
27
, No.
7
,
07
1990
, pp. 619–626.
2.
Armanios
,
E. A.
,
Hooke
,
D.
,
Kamat
,
M.
,
Palmer
,
D.
, and
Li
,
J.
, “
Design and Testing of Composite Laminates for Optimum Extension-Twisting Coupling
,”
Composite Materials: Testing and Design (Eleventh Volume)
, ASTM STP 1206,
Camponeschi
,
E. T.
 Jr.
, Ed.,
American Society for Testing and Materials
,
Philadelphia
,
1993
, pp. 249–262.
3.
Armanios
,
E. A.
and
Li
,
J.
, “
Interlaminar Fracture Analysis of Unsymmetrical Laminates
,”
Composite Materials: Fatigue and Fracture, Fourth Volume
, ASTM STP 1156,
Stinchcomb
W. W.
and
Ashbaugh
N. E.
, Eds.,
American Society for Testing and Materials
,
Philadelphia
,
1993
, pp. 341–360.
4.
Winckler
,
S. I.
, “
Hygrothermally Curvature Stable Laminates with Tension-Torsion Coupling
,”
Journal, American Helicopter Society
, Vol.
31
, No.
7
,
07
1985
, pp. 56–58.
5.
Vinson
,
J. R.
and
Sierakowski
,
R. L.
The Behavior of Structures Composed of Composite Materials
,
Martinus Nijhoff
,
Dordecht, The Netherlands
,
1987
, p. 54.
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