This paper considers the multi-axial stress-strain-failure response of two commercially woven ceramic matrix composites. The different failure mechanisms of uni-axially stressed tows and woven composites are addressed. A model is postulated in which the local transverse and shear stressing, arising from the weave, instantaneously deactivate wake debonding and fiber pullout and initiates dynamic fiber failure; hence, triggering catastrophic failure of the axially stressed region of the tow. The model is shown to predict experimentally measured stress-strain-failure results for the woven composites considered. Simple stress-strain-failure models are also proposed for tows subjected to axial-transverse and axial-shear loadings, but due to the lack of experimental data they have not been validated.

1.
Kelly
,
A.
, 1989,
Concise Encyclopedia of Composite Materials, Section on CMCs
,
Pergamon
,
Oxford
.
2.
Evans
,
A. G.
, and
Naslain
,
R.
, 1995, “
High-Temperature Ceramic-Matrix Composites
,”
Ceram. Trans.
1042-1122,
57
, pp.
381
388
.
3.
Cox
,
B. N.
, and
Yang
,
Q.
, 2006, “
In Quest of Virtual Tests for Structural Composites
,” in sciencemag.org.
4.
Blacklock
,
M.
, and
Hayhurst
,
D. R.
, 2009, “
Initial Elastic Properties of Ceramic Matrix Composite Fibre Tows
,” School of MACE, The University of Manchester, Research Report No. DMM.09.07.
5.
Tang
,
C.
,
Blacklock
,
M.
, and
Hayhurst
,
D. R.
, 2009, “
Uni-Axial Stress-Strain Response and Thermal Conductivity Degradation of Ceramic Matrix Composite Fibre Tows
,”
Proc. R. Soc. London, Ser. A
0950-1207,
465
, pp.
2849
2876
.
6.
Tang
,
C.
,
Blacklock
,
M.
, and
Hayhurst
,
D. R.
, 2010, “
Stress-Strain Response and Thermal Conductivity Degradation of Ceramic Matrix Composite Fibre Tows in 0°–90° Uni-Directional and Woven Composites
,”
J. Compos. Mater.
0021-9983, to be published.
7.
Zhang
,
D.
, and
Hayhurst
,
D. R.
, 2010, “
Stress-Strain and Fracture Behaviour of 0°/90° and Plain Weave Ceramic Matrix Composites From Tow Multi-Axial Properties
,”
Int. J. Solids Struct.
0020-7683,
47
, pp.
2958
2969
.
8.
Mathur
,
R.
, 1991, SGL HITCO, Carbon Composites, Inc., Gardena, LA, private communication.
9.
Krenkel
,
W.
, 2005, “
Carbon Fibre Reinforced Silicon Carbide Composites
,”
Handbook of Ceramic Composites
,
N. P.
Bansal
, ed.,
Kluwer Academic
,
Boston
, Chap. 6.
10.
Sheikh
,
M. A.
,
Taylor
,
S. C.
,
Hayhurst
,
D. R.
, and
Taylor
,
R.
, 2009, “
Experimental Investigation of the Effect of Mechanical Loading on Thermal Transport in Ceramic Matrix Composites
,”
J. Multiscale Modeling
,
1
(
3-4
), pp.
403
431
.
11.
Karandikar
,
P.
, and
Chou
,
T.
, 1993, “
Characterization and Modeling of Microcracking and Elastic Moduli Changes in Nicalon-CAS Composites
,”
Compos. Sci. Technol.
0266-3538,
46
, pp.
253
263
.
12.
Harris
,
B.
,
Habib
,
F. A.
, and
Cooke
,
R. G.
, 1992, “
Matrix Cracking and the Mechanical Behaviour of SiC-CAS Composites
,”
Proc. R. Soc. London, Ser. A
0950-1207,
437
, pp.
109
131
.
13.
Wang
,
S. W.
, and
Pavizi-Majidi
,
A.
, 1992, “
Experimental Charaterization of the Tensile Behaviour of Nicalon Fibre-Reinforced Calcium Aluminosilicate Composites
,”
J. Mater. Sci.
0022-2461,
27
, pp.
5483
5496
.
15.
Del Puglia
,
P.
,
Sheikh
,
M. A.
, and
Hayhurst
,
D. R.
, 2004, “
Classification and Quantification of Initial Porosity in a CMC Laminate
,”
Composites, Part A
1359-835X,
35
, pp.
223
230
.
16.
Tang
,
C.
, and
Hayhurst
,
D. R.
, 2009, “
Prediction of Thermo-Mechanical Behaviour of a Nicalon-CAS 0°–90° Ceramic Matrix Composite From Constituent Materials Properties
,” School of MACE, The University of Manchester, Research Report No. DMM.09.10.
17.
Hayhurst
,
D. R.
,
Leckie
,
F. A.
, and
Evans
,
A.
, 1991, “
Component Design-Based Model for Deformation and Rupture of Tough Fibre-Reinforced Ceramic Matrix Composites
,”
Proc. R. Soc. London, Ser. A
0950-1207,
434
, pp.
369
381
.
18.
Weibull
,
W.
, 1939, “
A Statistical Theory of Strength of Materials
,”
Proceedings of the Royal Swedish Institute
, Stockholm, Vol.
151
, pp.
1
14
.
19.
Evans
,
A. G.
, and
Marshall
,
D. B.
, 1989, “
The Mechanical Behavior of Ceramic Matrix Composites
,”
Proceedings of the International Conference on Materials and Engineering Design: The Next Decade
, The Institute of Materials, London, pp.
251
286
.
20.
Aveston
,
J.
,
Cooper
,
G. A.
, and
Kelly
,
A.
, 1971, “
Single and Multiple Fracture
,”
Proceedings of the Conference on the Properties of Fibre Composites
, National Physical Laboratory,
IPC Science and Technology Press
,
Guildford, UK
.
21.
Johnson
,
W.
, 1972,
Impact Strength of Materials
,
Edward Arnold
,
London
, p.
20
.
22.
Papoulis
,
A.
, 2002,
Probability, Random Variables, and Stochastic Processes
,
4th ed.
,
McGraw-Hill
,
London
.
23.
Kelly
,
A.
, and
MacMillan
,
N. H.
, 1986,
Strong Solids
,
3rd ed.
,
Clarendon
,
Oxford
.
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