An investigation into the growth behavior of interlayer and intralayer cracks in delaminated cross-ply laminates subjected to fatigue compression is presented. Experimental data indicate different fatigue growth patterns for the two cases. The effects of mode mixity and position of the delamination in the formation of the cracks are studied. A mode-dependent fatigue growth law is applied in order to predict the behavior of the intralayer and interlayer cracks. Successful correlation of the analytical and test data is conducted for the interlayer cracks. For the intralayer cracks, addition of contact effects and local geometrical parameters in the model are suggested.

1.
Bradley, W. L., Wood, C., and Chatawanich, C., 1995, “The Effect of Interfacial Strength Microstructure and Moisture on Transverse Cracking in Composites,” Tenth International Conference in Composite Materials, Proceedings of ICCM-10, Vol. 1, B. C. Whistler, ed., Aug., pp. 311–318.
2.
Comninou
M.
,
1977
, “
The Interface Crack
,”
ASME Journal of Applied Mechanics
, Vol.
44
, pp.
631
636
.
3.
Isaac M. Daniel, and Ori Ishai, 1994, Engineering Mechanics of Composite Materials, Oxford University Press.
4.
Erdogan
F.
,
1963
, “
Stress Distribution in a Nonhomogeneous Elastic Plane with Cracks
,”
ASME Journal of Applied Mechanics
, Vol.
30
, pp.
232
237
.
5.
Erdogan
F.
,
1965
, “
Stress Distribution in Bonded Dissimilar Materials with Cracks
,”
ASME Journal of Applied Mechanics
, Vol.
32
, pp.
403
410
.
6.
Evans
A. G.
,
He
M. Y.
, and
Hutchinson
J. W.
,
1989
, “
Interface Debonding and Fiber Cracking in Brittle Matrix Composites
,”
Journal of the American Ceramic Society
, Vol.
72
, Dec., pp.
2300
2303
.
7.
Ferrie, C. H., 1977, “Effect of Transverse Shear on the Postbuckling and Growth Characteristics of Delaminated Composites,” Ph.D. thesis, Georgia Institute of Technology, Dec.
8.
He
M. Y.
, and
Hutchinson
J. W.
,
1989
, “
Kinking of a Crack out of an Interface
,”
ASME Journal of Applied Mechanics
, Vol.
56
, pp.
270
278
.
9.
He
M. Y.
,
Evans
A. G.
, and
Hutchinson
J. W.
,
1994
, “
Crack Deflection at an Interface Between Dissimilar Elastic Materials: Role of Residual Stresses
,”
International Journal of Solids & Structures
, Vol.
31
, No.
24
, Dec., pp.
3443
3455
.
10.
Highsmith, A. L., and Reifnsider, K. L., 1982, “Stiffness Reduction Mechanisms in Composite Laminates,” Damage in Composite Materials, ASTM STP 775, K. L. Reifsnider, Ed., American Society of Testing and Materials, pp.103–117.
11.
Hutchinson
J. W.
, and
Suo
Z.
,
1992
, “
Mixed Mode Cracking in Layered Materials
,”
Advances in Applied Mechanics
, Vol.
29
, pp.
63
190
.
12.
Kardomateas
G. A.
,
1993
, “
The Initial Postbuckling and Growth Behavior of Internal Delaminations in Composite Plates
,”
ASME Journal of Applied Mechanics
, Vol.
60
, pp.
903
910
.
13.
Kardomateas
G. A.
, and
Pelegri
A. A.
,
1994
, “
The Stability of Delamination Growth in Compressively Loaded Composite Plates
,”
International Journal of Fracture
, Vol.
65
, pp.
261
276
.
14.
Kardomateas
G. A.
, and
Pelegri
A. A.
, and
Malik
B. U.
,
1995
, “
Growth of Internal Delaminations Under Cyclic Compression in Composite Plates
,”
Journal of the Mechanics of Physics and Solids
, Vol.
43
, No.
6
, pp.
847
868
.
15.
O’Brien, T. K., 1990, Composite Materials: Testing and Design (Ninth Volume), ASTM STP 1059, S. P. Garbo, ed., American Society for Testing Materials, Philadelphia, pp. 7–33.
16.
Ogin, S. L., 1994, “Laminates: Cross-ply, Angle Ply,” Handbook of Polymer-Fibre Composites, Longman Scientific & Technical, I. Jones, ed., pp. 245–248.
17.
Pelegri, A. A., 1996, “Tests and Analysis on the Delamination Fatigue Growth in Glass/Epoxy Composite Plates,” AIAA-96–1652-CP, American Institute of Aeronautics and Astronautics, pp. 2567–2577.
18.
Pelegri, A. A., 1997, “Delamination Growth Behavior in Cross-Ply Composites Under Compressive Cyclic (Fatigue) Loading,” Ph.D. Thesis, Georgia Institute of Technology, Sept.
19.
Pelegri, A. A., and Kardomateas, G. A., “Intralayer Cracking in Delaminated Glass/Epoxy and Graphite/Epoxy Laminates under Cyclic or Monotonic Loading,” AIAA-98–1879, American Institute of Aeronautics and Astronautics, pp. 1534–1544.
20.
Pelegri, A. A., Kardomateas, G. A., and Malik, B. U., 1997, “The Fatigue Growth of Internal Delaminations Under Compressive Loading in Cross Ply Composite Plates,” Composite Materials: Fatigue and Fracture, ASTM STP 1285, E. A, Armanios, ed., ASTM, Vol. 6, pp. 146–163.
21.
Ramkumar, R. L., 1982, “Compression Fatigue Behavior of Composites in the Presence of Delaminations,” Damage in Composite Materials, ASTM STP 775, K. L. Reifsnider, ed., American Society for Testing and Materials, pp. 184–210.
22.
Rice, J. R., 1968, “Mathematical Analysis in the Mechanics of Fracture,” Fracture: Advanced Treatise, H. Liebowitz., ed., Vol. 2, pp. 191–311.
23.
Russell, A. J., and Street, K. N., 1989, “Predicting Interlaminar Fatigue Crack Growth Rates in Compressively Loaded Laminates,” Composite Materials: Fatigue and Fracture, American Society of Testing Materials: Special Technical Publication 1012, Vol. 2, Publ. by ASTM, Philadelphia, PA, pp. 162–178.
24.
Sahawan
K. W.
, and
Waas
A. M.
,
1997
, “
Non-Self Similar Decohesion Along a Finite Interface of Unilaterally Contained Delaminations
,”
Proc. Royal Society of London, Series A
,
453
, Mar., pp.
515
550
.
25.
Soutis, C., and Turkmen, D., 1995, “Hygrothermal Effects on the Compressive Strength of T800/924C CFRP Laminates,” The Tenth International Conference on Composite Materials, Proceedings of ICCM-10, B. C. Whistler, ed., Vol. VI: Micro structure, Degradation and Design, Canada, Aug., pp. 231–238.
26.
Talreja
R.
,
1985
, “
Transverse Cracking and Stiffness Reduction in Composite Laminates
,”
Journal of Composite Materials
, Vol.
19
, pp.
355
375
.
27.
Waas
A. M.
,
Babcock
C. D.
, and
Knauss
W. G.
,
1990
, “
An Experimental Study of Compression Failure of Fibrous Laminated Composites on the Presence of Stress Gradients
,”
International Journal of Solids and Structures
, Vol.
26
, No.
9/10
, pp.
1071
1098
.
28.
Wang
A. S. D.
,
1984
, “
Fracture Analysis of Sublaminate Cracks in Composite Materials
,”
Composite Technology Review
, Vol.
6
, pp.
45
62
.
29.
Whitcomb, J. D., 1984, “Strain-Energy Release Rate Analysis of Cyclic Delamination Growth in Compressively Loaded Laminates,” Effects in Defects of Composite Materials, ASTM STP 836, American Society of Testing Materials, pp. 175–193.
30.
Whitcomb, J. D., 1988, “Instability-Related Delamination Growth of Embedded and Edge Delamination,” Ph.D. Thesis, Virginia Polytechnic Institute and State University.
31.
Whitcomb
J. D.
,
1992
, “
Analysis of a Laminate with a Postbuckled Embedded Delamination, Including Contact Effects
,”
Journal of Composite Materials
, Vol.
26
, No.
10
, pp.
1523
1535
.
32.
Williams
M. L.
,
1959
, “
The Stress Around a Fault or Crack in Dissimilar Media
,”
Bulletin of Seismological Society of America
, Vol.
49
, pp.
199
204
.
33.
Varna
J.
, and
Berglund
L.
,
1991
, “
Multiple Transverse Cracking and Stiffness Reduction in Cross-Ply Laminates
,”
Journal of Composite Technology and Research
, Vol.
13
, No.
2
, pp.
99
106
.
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