The objective of this paper is to investigate the effects of geometrical parameters such as the edge distance-to-hole diameter ratio {e/d}, plate width-to-hole diameter ratio {w/d}, and the distance between two holes-to-hole diameter ratio {l/d} on stress distribution in a unidirectional composite laminate with two serial pin-loaded holes, analytically and numerically. It is assumed that all short and long fibers lie in one direction while loaded by a force po at infinity. To derive differential equations based on a shear lag model, a hexagonal fiber-array model is considered. The resulting pin loads on composite plate are modeled through a series of spring elements accounting for pin elasticity. The analytical solutions are, moreover, compared with the detailed 3D finite element values. A close match is observed between the two methods. The presence of the pins on shear stress distribution in the laminate is also examined for various pin diameters.

References

References
1.
De Jong
,
T.
,
1977
, “
Stresses Around Pin–Loaded Holes in Elastically Orthotropic or Isotropic Plates
,”
J. Compos. Mater.
,
11
, pp.
313
331
.10.1177/002199837701100306
2.
Waszczak
,
J.
, and
Cruse
,
T.
,
1971
, “
Failure Mode and Strength Predictions of Anisotropic Bolt Bearing Specimens
,”
J. Compos. Mater.
,
5
, pp.
421
425
.10.1177/002199837100500314
3.
Zhang
,
K.
, and
Ueng
,
C.
,
1985
, “
Stresses Around a Pin–Loaded Hole in Orthotropic Plates With Arbitrary Loading Direction
,”
Compos. Struct.
,
3
, pp.
119
143
.10.1016/0263-8223(85)90040-6
4.
Hyer
,
M. W.
, and
Klang
,
E. C.
,
1985
, “
Contact Stresses in Pin-Loaded Orthotropic Plates
,”
Int. J. Solid Struct.
,
21
(
9
), pp.
957
975
.10.1016/0020-7683(85)90110-6
5.
Hyer
,
M. W.
,
Klang
,
E. C.
, and
Cooper
,
D. E.
,
1987
, “
The Effect of Pin Elasticity, Clearance, and Friction on the Stresses in a Pin–Loaded Orthotropic Plate
,”
J. Compos. Mater.
,
21
, pp.
190
206
.10.1177/002199838702100301
6.
Liu
,
D.
, and
Hou
,
L.
,
2003
, “
Three-Dimensional Size Effects in Composite Pin Joints
,”
Exp. Mech.
,
43
, pp.
115
123
.10.1007/BF02410492
7.
Liu
,
D.
,
Raju
,
B. B.
, and
You
,
J.
,
1999
, “
Thickness Effects on Pinned Joints for Composites
,”
J. Compos. Mater.
,
33
(
1
), pp.
2
21
.10.1177/002199839903300101
8.
Li
,
R.
,
Kelly
,
D.
, and
Crosky
,
A.
,
2002
, “
Strength Improvement by Fibre Steering Around a Pin Loaded Hole
,”
Compos. Struct.
,
57
, pp.
377
383
.10.1016/S0263-8223(02)00105-8
9.
Chutima
,
S.
, and
Blackie
,
A. P.
,
1996
, “
Effect of Pitch Distance, Row Spacing, End Distance and Bolt Diameter on Multi-Fastened Composite Joints
,”
Composites, Part A
,
27
(
2
), pp.
105
110
.10.1016/1359-835X(95)00020-3
10.
Rowlands
,
R. E.
,
Rahman
,
M. U.
,
Wilkinson
,
T. L.
, and
Chiang
Y. I.
,
1982
, “
Single and Multiple Bolted Joints in Orthotropic Materials
,”
Composites
,
13
(
3
), pp.
273
279
.10.1016/0010-4361(82)90010-6
11.
Pradhan
,
B.
, and
Kumar
,
R.
,
1984
, “
Stresses Around Partial Contact Pin-Loaded Holes in FRP Composite Plates
,”
J. Reinf. Plastics Compos.
,
3
(
1
), pp.
69
84
.10.1177/073168448400300104
12.
Naik
,
R. A.
, and
Crews
,
J. R.
,
1986
, “
Stress Analysis Method for a Clearance-Fit Bolt Under Bearing Loads
,”
AIAA J.
,
24
(
8
), pp.
1348
1353
.10.2514/3.9442
13.
Ramamurthy
,
T. S.
,
1989
, “
New Studies on the Effect of Bearing Loads in Lugs With Clearance Fit Pins
,”
Compos. Struct.
,
11
, pp.
135
150
.10.1016/0263-8223(89)90065-2
14.
Kim
,
S. J.
, and
Kim
,
J. H.
,
1995
, “
Finite Element Analysis of Laminated Composite Plates With Multi-Pin Joints Considering Friction
,”
Comput. Struct.
,
55
(
3
), pp.
507
514
.10.1016/0045-7949(95)98876-R
15.
Ko
,
H. Y.
, and
Kwak
,
B. M.
,
1998
, “
Contact Analysis of Mechanically Fastened Joints in Composite Laminates by Linear Complementarily Problem Formulation
,”
Compos. Struct.
,
40
(
3-4
), pp.
187
200
.10.1016/S0263-8223(97)00146-3
16.
Lanza
di
Scalea
,
F.
,
Cappello
,
F.
, and
Cloud
,
G. L.
,
1999
, “
On the Elastic Behavior of a Cross-Ply Composite Pin-Joint With Clearance Fits
,”
J. Thermoplastic Compos. Mater.
,
12
,
13
22
.10.1177/089270579901200102
17.
Pierron
,
F.
,
Cerisier
,
F.
, and
Grediac
,
M.
,
2000
, “
A Numerical and Experimental Study of Woven Composite Pin-Joints
,”
J. Compos. Mater.
,
34
(
12
), pp.
1028
1054
.10.1177/002199830003401204
18.
Kelly
,
G.
, and
Hallstrom
,
S.
,
2004
, “
Bearing Strength of Carbon Fiber/Epoxy Laminates; Effects of Bolt Hole Clearance
,”
Composites, Part B
,
35
, pp.
331
343
.10.1016/j.compositesb.2003.11.001
19.
Icten
,
B. M.
, and
Sayman
,
O.
,
2003
, “
Failure Analysis of Pin-Loaded Aluminum-Glass-Epoxy Sandwich Composite Plates
,”
Compos. Sci. Tech.
,
63
, pp.
727
737
.10.1016/S0266-3538(02)00260-9
20.
Okutan
,
B.
,
2002
, “
The Effects of Geometric Parameters on the Failure Strength for Pin-Loaded Multi-Directional Fiber-Glass Reinforced Epoxy Laminate
,”
Composites, Part B
,
33
, pp.
567
578
.10.1016/S1359-8368(02)00054-9
21.
Tercan
,
M.
,
Asi, O.
,
Aktaş
,
2005
, “
An Experimental Investigation of the Bearing Strength of Weft-Knitted 1 × 1 Rib Glass Fiber Composites
,”
Compos. Struct.
,
78
(3), pp. 392–396.10.1016/j.compstruct.2005.10.015
22.
Shishesaz
,
M.
,
Attar
,
M. M.
, and
Robati
,
H.
,
2010
, “
The Effect of Fiber Arrangement on Stress Concentration Around a Pin in a Laminated Composite Joint
,”
Proceedings of the 10th Biennial Conference on Engineering Systems Design and Analysis
,
ASME
Paper No. ESDA2010-24587.10.1115/ESDA2010-24587
You do not currently have access to this content.