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ASTM Selected Technical Papers
Composite Materials: Fatigue and Fracture, Fourth Volume
By
W Stinchcomb
W Stinchcomb
1
Virginia Polytechnic Institute and State University and the U.S. Air Force Academy
;
symposium chairman and editor
Search for other works by this author on:
N Ashbaugh
N Ashbaugh
2
University of Dayton, Research Institute
,
Dayton, OH
;
symposium chairman and editor
Search for other works by this author on:
ISBN-10:
0-8031-1498-2
ISBN:
978-0-8031-1498-2
No. of Pages:
6608
Publisher:
ASTM International
Publication date:
1993

A failure analysis method that includes the free edge effect was proposed for failure prediction in composite laminates containing a center hole. The location of onset of failure in the hole was determined by comparing the strengths of off-axis coupon specimens with the hoop stress around the hole. The subsequent failure progression was performed by the ply-by-ply classical laminate failure analysis. Experiments on [0/90/±45]s and [0/90]s laminates and their off-axis specimens were performed to verify the present method.

1.
Awerbuch
,
J.
and
Madhukar
,
M. S.
, “
Notched Strength of Composite Laminates: Predictions and Experiments—A Review
,”
Journal of Reinforced Plastics and Composites
, Vol.
4
,
01
1985
, pp. 3–159.
2.
Whitney
,
J. M.
and
Nuismer
,
R. J.
, “
Stress Fracture Criterion for Laminated Composites Containing Stress Concentrations
,”
Journal of Composite Materials
, Vol.
8
,
07
1974
, pp. 253–265.
3.
Nuismer
,
R. J.
and
Whitney
,
J. M.
, “
Uniaxial Failure of Composite Laminates Containing Stress Concentrations
,”
Fracture Mechanics of Composites
, ASTM STP 593,
American Society for Testing and Materials
,
Philadelphia
,
1975
, pp. 117–142.
4.
Tan
,
S. C.
, “
Effective Stress Fracture Models for Unnotched and Notched Multidirectional Laminates
,”
Journal of Composite Materials
, Vol.
22
,
1988
, pp. 322–340.
5.
Tan
,
S. C.
, “
Laminated Composites Containing an Elliptical Opening. I. Approximate Stress Analyses and Fracture Models
,”
Journal of Composite Materials
, Vol.
21
,
1987
, pp. 925–948.
6.
El-Zein
,
M. S.
and
Reifsnider
,
K. L.
, “
The Strength Prediction of Composite Laminates Containing a Circular Hole
,”
Technology and Research, JCTRER
, Vol.
12
, No.
1
, Spring
1990
, pp. 24–30.
7.
Waddoups
,
M. E.
,
Eisenmann
,
J. R.
, and
Kaminski
,
B. E.
, “
Macroscopic Fracture Mechanics of Advanced Composite Materials
,”
Journal of Composite Materials
, Vol.
5
,
1971
, pp. 446–454.
8.
Backlund
,
J.
and
Aronsson
,
C. G.
, “
Tensile Fracture of Laminates with Holes
,”
Journal of Composite Materials
, Vol.
20
,
07
1986
, pp. 259–307.
9.
Sandhu
,
R. S.
,
Gallo
,
R. L.
, and
Sendeckyj
,
G. P.
, “
Initiation and Accumulation of Damage in Composite Laminates
,”
Composite Materials: Testing and Design (6th Conference)
, ASTM STP 787,
Daniel
I. M.
, Ed.,
American Society for Testing and Materials
,
Philadelphia
,
1982
, pp. 163–182.
10.
Chang
,
F. K.
and
Chang
,
K. Y.
, “
A Progressive Damage Model for Laminated Composites Containing Stress Concentrations
,”
Journal of Composite Materials
, Vol.
21
,
1987
, pp. 834–855.
11.
Shalev
,
D.
and
Reifsnider
,
K. L.
, “
Study of the Onset of Delamination at Holes in Composite Laminates
,”
Journal of Composite Materials
, Vol.
24
,
1990
, pp. 42–71.
12.
O'Brien
,
T. K.
and
Raju
,
I. S.
, “
Strain-Energy-Release Rate Analysis of Delamination Around an Opening Hole in Composite Laminates
,”
25th AIAA Structures, Structural Dynamics and Materials Conference
,
Palm Springs, CA
,
05
1984
, pp. 526–536.
13.
Sun
,
C. T.
and
Chu
,
G. D.
, “
Reducing Free Edge Effect on Laminate Strength by Edge Modification
,”
Journal of Composite Materials
, Vol.
25
,
02
1991
, pp. 142–167.
14.
Sun
,
C. T.
and
Zhou
,
S. G.
, “
Failure of Quasi-Isotropic Composite Laminates with Free Edges under Off-axis Loading
,”
Journal of Reinforced Plastics and Composites
, Vol.
7
,
11
1988
, pp. 515–557.
15.
Reifsnider
,
K. L.
,
Henneke
,
E. G.
, and
Stinchcomb
,
W. W.
, “
Delamination in Quasi-Isotropic Graphite Epoxy Laminates
,”
Composite Materials: Testing and Design (4th Conference)
, ASTM STP 617,
American Society for Testing and Materials
,
Philadelphia
,
1977
, pp. 93–105.
16.
Pipes
,
R. B.
and
Daniel
,
I. M.
, “
Moire Analysis of Interlaminar Shear Edge Effect in Laminated Composites
,”
Journal of Composite Materials
, Vol.
5
,
1971
, pp. 255–259.
17.
Karlak
,
R. F.
, “
Hole Effects in a Related Series of Symmetrical Laminates
,”
Proceedings of Failure Modes in Composites, IV
,
The Metallurgical Society of AIME
,
Chicago, IL
,
1977
, pp.105–117.
18.
Pipes
,
R. B.
,
Wetherhold
,
R. C.
, and
Gillespie
,
J. W.
, Jr.
, “
Notched Strength of Composite Materials
,”
Journal of Composite Materials
, Vol.
12
,
1979
, pp. 148–160.
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