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ASTM Selected Technical Papers
Composite Materials: Testing and Design (6th Conference)
By
IM Daniel
IM Daniel
1
Professor and Director
,
Experimental Stress Analysis Laboratory, Illinois Institute of Technology
,
Chicago,
Illinois
;
symposium chairman and editor
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ISBN-10:
0-8031-0695-5
ISBN:
978-0-8031-0695-6
No. of Pages:
597
Publisher:
ASTM International
Publication date:
1982

The object of the present work was to investigate the failure behavior of a [02/90/±45] AS/3501-5A graphite/epoxy laminate through proof testing. The primary emphasis was on the delineation of the effect of the proof test on the residual strength and life, the establishment of strength-life relations, and the identification of failure process. The test series consisted of static tests, tension-tension fatigue tests preceded by proof tests, and examinations of failure modes. Major findings can be summarized as follows: (1) Proof tests have little effect on the residual strength and life. (2) Strength and life are statistically interrelated so that a statically stronger specimen has a longer life. (3) A higher modulus is an indication of a higher strength and longer life. (4) The failure process of the present laminate is similar to that of the quasi-isotropic [0/90/±45]8 laminate. However, the crack multiplication in the present laminate is more extensive and faster. (5) Delamination surfaces consist of shiny and dull areas. The shiny areas have bare fibers, whereas the dull areas have fiber imprints in the epoxy.

1.
Haviland
,
R. P.
,
Engineering Reliability and Long Life Design
,
Van Nostrand
,
New York
,
1964
.
2.
Halpin
,
J. C.
,
Jerina
,
K. L.
, and
Johnson
,
T. A.
in
Analysis of Test Methods for High Modulus Fibers and Composites
, ASTM STP 521,
American Society for Testing and Materials
,
1973
, pp. 5-64.
3.
Hahn
,
H. T.
and
Kim
,
R. Y.
,
Journal of Composite Materials
 0021-9983, Vol.
9
,
1975
, pp. 297-311.
4.
Awerbuch
,
J.
and
Hahn
,
H. T.
in
Fatigue of Filamentary Composite Materials
, ASTM STP 636,
American Society for Testing and Materials
,
1977
, pp. 248-266.
5.
Yang
,
J. N.
and
Liu
,
M. D.
,
Journal of Composite Materials
 0021-9983, Vol.
11
,
1977
, pp. 176-203.
6.
Wang
,
A. S. D.
,
Chou
,
P. C.
, and
Alper
,
J.
, “
Effects of Proof-Test on the Strength and Fatigue Life of a Unidirectional Composite
,” AFML-TR-79-4189,
05
1979
.
7.
Kim
,
R. Y.
and
Park
,
W. J.
,
Journal of Composite Materials
 0021-9983, Vol.
14
,
1980
, pp. 69-79.
8.
Hahn
,
H. T.
and
Tsai
,
S. W.
,
Journal of Composite Materials
 0021-9983, Vol.
8
,
1974
, pp. 288-305.
9.
Tsai
,
S. W.
and
Hahn
,
H. T.
in
Inelastic Behavior of Composite Materials
,
Herakovich
C. T.
, Ed., AMD-Vol.
13
,
American Society of Mechanical Engineers
,
1975
, pp. 73-96.
10.
Broutman
,
L. J.
and
Sahu
,
S.
, “
Progressive Damage of a Glass Reinforced Plastic During Fatigue
,” in
Proceedings, 24th SPI Conference
,
1969
, 11-D.
11.
Hahn
,
H. T.
, “
Fatigue Behavior and Life Prediction of Composite Laminates
,” AFML-TR-78-43,
04
1978
.
12.
Reifsnider
,
K. L.
,
Henneke
,
E. G.
, II
, and
Stinchcomb
,
W. W.
, “
Defect-Property Relationships in Composite Materials
,” AFML-TR-76-81,
04
1976
; Part II,
06
1977
; Part III,
06
1978
; Part IV,
06
1979
.
13.
Kim
,
R. Y.
and
Hahn
,
H. T.
,
Journal of Composite Materials
 0021-9983, Vol.
13
,
1979
, pp. 2-16.
14.
Kim
,
R. Y.
,
Advances in Materials, Proceedings of the 3rd International Conference on Composite Materials
,
Pergamon Press
,
Elmsford, N.Y.
,
1980
, pp. 1015-1028.
15.
Guild
,
F. J.
,
Walton
,
D.
,
Adams
,
R. D.
, and
Short
,
D.
,
Composites
 0010-4361, Vol.
7
,
1976
, pp. 173-179.
16.
Hahn
,
H. T.
,
Journal of Composite Materials
 0021-9983, Vol.
10
,
1976
, pp. 266-278.
17.
Hamstad
,
M. A.
, “
Deformation and Failure Information from Composite Materials via Acoustic Emission
,” Preprint UCRL-81272,
Lawrence Livermore Laboratory
,
11
1978
.
18.
Nguyen
,
N. Q.
and
Kardos
,
J. L.
, “
Fatigue Failures of Composite Laminates
,” AFML-TR-79-4035,
04
1979
.
19.
Cohen
,
A. C.
,
Technometrics
 0040-1706, Vol.
7
,
1965
, pp. 579-588.
20.
Whitney
,
J. M.
, “
Fatigue Characterization of Composite Materials
,” AFML-TR-79-4111,
10
1979
.
21.
Ryder
,
J. T.
and
Walker
,
E. K.
, “
Ascertainment of the Effect of Compressive Loading on the Fatigue Lifetime of Graphite/Epoxy Laminates for Structural Applications
,” AFML-TR-76-241,
12
1976
.
22.
Hahn
,
H. T.
and
Chiao
,
T. T.
,
Advances in Composite Materials, Proceedings of the 3rd International Conference on Composite Materials
,
Pergamon Press
,
Elmsford, N.Y.
,
1980
, pp. 584-596.
23.
Yang
,
J. N.
and
Sun
,
C. T.
,
Journal of Composite Materials
 0021-9983, Vol.
14
,
1980
, pp. 168-176.
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