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ASTM Selected Technical Papers
Nondestructive Evaluation and Flaw Criticality for Composite Materials
By
RB Pipes
RB Pipes
1
University of Delaware
,
editor
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WR Scott
WR Scott
2
University of Delaware
,
coeditor
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SV Kulkarni
SV Kulkarni
3
University of Delaware
,
coeditor
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WW Stinchcomb
WW Stinchcomb
4
University of Delaware
,
coeditor
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ISBN-10:
0-8031-0527-4
ISBN:
978-0-8031-0527-0
No. of Pages:
366
Publisher:
ASTM International
Publication date:
1979

Experimental results have been presented for the case of a flawed unidirectional lamina constrained by off-axis unflawed plies under static and fatigue loading. Flaw growth in the interior of the laminate, around the embedded flaw, was followed by nondestructive testing methods including video-thermographs and ultrasonic C-scan schemes. Two aspects of the results were distinctive. There was an effort of lamination on damage development which was independent of the presence of the notch, and effects which were directly related to the influence of the notch on the local situation. The results are compared with sectioning studies, surface replication, and stiffness change measurements.

1.
Proceedings
, Symposium on Inelastic Behavior of Composite Materials,
Herakovich
C. T.
, Ed.,
American Institute of Mining, Metallurgical and Petroleum Engineers
,
Houston, Tex.
,
11
1975
.
2.
Stinchcomb
,
W. W.
and
Reifsnider
,
K. L.
,
Fatigue Mechanisms, ASTM STP 675
,
American Society for Testing and Materials
,
1979
, pp. 762–787.
3.
Stinchcomb
,
W. W.
,
Reifsnider
,
K. L.
,
Yeung
,
P. C.
, and
O'Brien
,
T. K.
, “
Investigation and Characterization of Constraint Effects on Flaw Growth During Fatigue Loading of Composite Materials
,” Semi-Annual Status Reports I, II, III, NASA Grant NSG-1364,
Virginia Polytechnic Institute and State University
, Blacksburg, Va., Dec. 1976–May 1978.
4.
Reifsnider
,
K. L.
,
Henneke
,
E. G.
, II
, and
Stinchcomb
,
W. W.
, “
Defect-Property Relationships in Composite Materials
,” AFML-TR-76-81, Parts, I, II, III,
Air Force Materials Laboratory, Wright-Patterson AFB
, Ohio,
04
1976
,
1977
,
1978
.
5.
Stalnaker
,
D. O.
, “
An Investigation of Edge Damage Development in Quasi-Isotropic Graphite-Epoxy Laminates
,” Thesis,
Department of Engineering Science and Mechanics, Virginia Polytechnic Institute and State University
, Blackburg, Va.,
04
1976
.
6.
Reifsnider
,
K. L.
and
Williams
,
R. S.
,
Experimental Mechanics
 0014-4851, Vol.
14
, No.
12
,
12
1974
, pp. 479–485.
7.
Reifsnider
,
K. L.
in
Proceedings
, 14th Annual Society of Engineering Science Meeting,
Lehigh University
,
Bethlehem, Pa.
, 14–16, Nov. 1977.
8.
Talug
,
A.
, “
Analysis of Stress Fields in Composite Laminates with Interior Cracks
,” Doctoral Dissertation,
Department of Engineering Science and Mechanics, College of Engineering, Virginia Polytechnic Institute and State University
, Blacksburg, Va.,
08
1978
.
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