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ASTM Selected Technical Papers
Effects of Defects in Composite Materials
By
DJ Wilkins
DJ Wilkins
1
Engineering staff specialist
,
General Dynamics
,
Fort Worth, Texas
;
symposium chairman
.
Search for other works by this author on:
ISBN-10:
0-8031-0218-6
ISBN:
978-0-8031-0218-7
No. of Pages:
281
Publisher:
ASTM International
Publication date:
1984

Viable test methods that may be used in characterizing matrix-dominated composite properties are assessed. Special emphasis is placed on matrix cracking and delamination. Both strength characterization and fracture mechanics test methods are considered. Transverse tension, in-plane shear, interlaminar shear, and a laminate test for in situ first-ply failure are the strength tests considered. Fracture mechanics test methods discussed include the double-cantilever-beam test, a 90-deg center-notch tension test, and a free-edge-delamination tension test.

1.
Whitney
,
J. M.
,
Daniel
,
I. M.
, and
Pipes
,
R. B.
,
Experimental Mechanics of Fiber Reinforced Composite Materials
,
Society for Experimental Stress Analysis, Brookfield Center
,
Conn.
,
1982
, pp. 192-196.
2.
Chamis
,
C. C.
, “
Micromechanics Strength Theories
,”
Composite Materials, Vol. 5, Fracture and Fatigue
,
Broutman
L. J.
, Ed.,
1974
, pp. 94-153.
3.
Ashton
,
J. E.
,
Halpin
,
J. C.
, and
Petit
,
P. H.
,
Primer on Composite Materials: Analysis
,
Technomic Publishing Co.
,
Stanford, Conn.
,
1969
.
4.
Browning
,
C. E.
,
Abrams
,
F. L.
, and
Whitney
,
J. M.
, “
A Four-Point Shear Test for Graphite/Epoxy Composites
,”
Composite Materials: Quality Assurance and Processing
, ASTM STP 797,
American Society for Testing and Materials
,
Philadelphia
,
1983
.
5.
Flaggs
,
D. L.
and
Kural
,
M. H.
,
Journal of Composite Materials
 0021-9983, Vol.
16
,
1982
, pp. 103-116.
6.
Whitney
,
J. M.
,
Browning
,
C. E.
, and
Hoogsteden
,
W.
,
Journal of Reinforced Plastics and Composites
 0731-6844, Vol.
1
,
1982
, pp. 297-313.
7.
Nicholls
,
D. J.
and
Gallagher
,
J.
,
Journal of Reinforced Plastics and Composites
 0731-6844, Vol.
2
,
1984
, pp. 2, 17.
8.
Brown
,
W. F.
, Jr.
, and
Strawley
,
J. E.
in
Plane Strain Crack Toughness Testing of High Strength Metallic Materials
, ASTM STP 410,
American Society for Testing and Materials
,
Philadelphia
,
1966
, p. 11.
9.
Paris
,
P. C.
and
Sih
,
G. C.
in
Fracture Toughness Testing
, ASTM STP 381,
American Society for Testing and Materials
,
Philadelphia
,
1965
, p. 30.
10.
Pagano
,
N. J.
and
Pipes
,
R. B.
,
International Journal of Mechanical Sciences
 0020-7403, Vol.
15
,
1973
, pp. 679-684.
11.
O'Brien
,
T. K.
in
Damage in Composite Materials
, ASTM STP 775,
Reifsnider
K. L.
, Ed.,
American Society for Testing and Materials
,
Philadelphia
,
1982
, pp. 140-167.
12.
Jones
,
R. M.
,
Mechanics of Composite Materials
,
McGraw-Hill
,
New York
,
1975
, pp. 147-155.
13.
Vanderkley
,
P. S.
, “
Mode I-Mode II Delamination Fracture Toughness of a Unidirectional Graphite/Epoxy Composite
,”
Texas A & M University Report
No. MM3724-81-15,
12
1981
.
14.
Wu
,
E. M.
,
Journal of Applied Mechanics
 0021-8936, Vol.
34
,
1967
, pp. 967-974.
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