Abstract
Ply breakage in laminated composites may be caused by impact load. Delamination usually precedes the failure of such broken ply laminates and it occurs at the interface of the broken and continuous plies. In the present work, an attempt has been made to find out the delamination initiation stress as well as critical strain energy release rate (Gc) for unidirectional [00] GL/E and GR/E laminates having one or more central ply/plies broken. Prediction of delamination initiation stress was attempted using "Quadratic Stress Criterion" and critical energy release for delamination has been assessed using LEFM in conjunction with a 3 D FE analysis.
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References
1.
1.
Tian, Z.
and
R. Swanson
. 1991 . Journal of Composite Materials , 25 :1427 -1444 .
2.
2.
Weicheng Cui
, et al. 1994 . Journal of Reinforced Plastics and Composites , 13 :722 -739 .
3.
3.
Cui, W.
,
M. R. Wisnom
and
M. Jones
. 1992. Proceeding of FRP Composites , Manchester , pp. 25/1 -25/10 .
4.
4.
Wisnom, M. R.
1992 . Journal of Reinforced Plastics and Composites , 11 :897 -909 .
5.
5.
Brewer, J. C.
and
P. A. Lagace
. 1988 . Journal of Composite Materials , 22 :1141 -1155 .
6.
6.
Zhou, S. G.
and
C. T. Sun
. 1990 . Journal of Composite Technology and Research , 12 :91 -91 .
7.
7.
Hellen, T. K.
1975 . Int. Journal Numerical Methods in Engg. , 9 :187 -207 .
8.
8.
Irwin, G. R.
1957 . Trans. ASME, Journal of Applied Mechanics , 24 :361 -364 .
9.
9.
Rybicki, E. F.
and
M. F. Kanninen
. 1977 . Engg. Fracture Mechanics , 9 :931 -938 .
10.
10.
Johanneson, T.
, et al. 1984 . Journal of Composite Materials , 18 :300 -312 .
11.
11.
O'Brien, T. K.
1982 . ASTMSTP
775 :140 -167 .
12.
12.
Kim, K. S.
and
C. S. Hong
. 1986 . Journal of Composite Materials , 20 :423 -438 .
13.
13.
Wang, S. S.
1993 . Journal of Composite Materials , 17 :210 -223 .
14.
14.
Mukherjee, Yu Xie
et al. 1994 . Journal of Composite Materials , 28 (9 ):837 -870 .
15.
15.
Yeh, H.
and
H. K. Kim
. 1994 . Journal of Reinforced Plastics and Composites , 13 :498 -508 .
16.
16.
Narin, J. A.
1988 . Journal of Composite Materials , 22 :561 -600 .