Articles
All articles | Recent articles
Effects of Micro-Damage on the Nonlinear Constitutive Behavior of SiC/SiC Minicomposites
S. Zhang1,2, X. Gao1,2, J. Chen1,2, H. Dong1,2, Y. Song1,2,3, H. Zhang4
1 Jiangsu Province Key Laboratory of Aerospace Power System, College of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, P.R. China
2 Key Laboratory of Aero-engine Thermal Environment and Structure, Ministry of Industry and Information Technology, Nanjing 210016, P.R. China
3 State Key Laboratory of Mechanics and Control Mechanical Structures, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, P.R. China
4 Military Representative Office Stationed 420 Factory, Chengdu 610503, P.R. China
received May 27, 2016, received in revised form July 14, 2016, accepted July 19, 2016
Vol. 7, No. 4, Pages 341-348 DOI: 10.4416/JCST2016-00040
Abstract
The effects of matrix cracking, fiber/matrix interfacial debonding and fiber fracture on the nonlinear constitutive behavior of SiC/SiC minicomposites were studied. An in-situ tensile test was performed to detect the matrix cracking in real time. The macroscopic tensile test was also performed on the SiC/SiC minicomposites to obtain their stress-strain responses. Based on the test results, models of these types of damage were developed. The shear-lag model was adopted to simulate the stress-strain response of SiC/SiC minicomposites. The contributions of these types of damage to the nonlinearity were discussed. The experimental and numerical results showed that fiber fracture occurs near the ultimate stress of minicomposites and that the nonlinear behavior of SiC/SiC minicomposites is primarily caused by matrix cracking and interfacial debonding. In addition, the mechanical behavior will recover its linearity after the saturation of matrix cracks and the complete debonding of the interface.
Download Full Article (PDF)
Keywords
Ceramic matrix composites, nonlinearity, micro-damage, matrix cracks, in-situ mechanical testing
References
1 Naslain, R.: Design, preparation and properties of non-oxide CMCs for application in engines and nuclear reactors: an overview, Compos. Sci. Technol., 64, 155 – 170, (2004).
2 Naslain, R., Lamon, J., Pailler, R., Bourrat, X., Guette, A., Langlais, F.: Micro/minicomposites: a useful approach to the design and development of non-oxide CMCs, Compos. Part A., 30, 537 – 547, (1999).
3 Gélébart, L., Chateau, C., Bornert, M., Crépin, J., Boller, E.: X-ray tomographic characterization of the macroscopic porosity of chemical vapor infiltration SIC/SIC Composites: effects on the elastic behavior, Int. J. Appl. Ceram. Tec., 7, 348 – 360, (2010).
4 Xu, Y.J., Zhang, W.H., Domaszewski, M.: Microstructure modelling and prediction of effective elastic properties of 3D multiphase and multilayer braided composite, Mater. Sci. Tech-lond., 27, 1213 – 1221, (2011).
5 Yanjun, C., Guiqiong, J., Bo, W., Wei, L.: Elastic behavior analysis of 3D angle-interlock woven ceramic composites, Acta. Mech. Solida. Sin., 19, 152 – 159, (2006).
6 Tang, C., Blacklock, M., Hayhurst, D.R.: Stress-strain response and thermal conductivity degradation of ceramic matrix composite fiber tows in 0 – 90° uni-directional and woven composites, J. Compos. Mater., 45, 1461 – 1482, (2011).
7 Morscher, G.N.: Modeling the elastic modulus of 2D woven CVI SiC composites, Compos. Sci. Technol., 66, 2804 – 2814, (2006).
8 Sauder, C., Brusson, A., Lamon, J.: Influence of interface characteristics on the mechanical properties of hi-nicalon type-S or Tyranno-SA3 fiber-reinforced SiC/SiC minicomposites, Int. J. Appl. Ceram. Tec., 7, 291 – 303, (2010).
9 Jacques, S., Lopez-Marure, A., Vincent, C., Vincent, H., Bouix, J.: SiC/SiC minicomposites with structure-graded BN interphases, J. Eur. Ceram. Soc., 20, 1929 – 1938, (2000).
10 Morscher, G.N., Martinez-Fernandez, J.: Fiber effects on minicomposite mechanical properties for several silicon carbide fiber-chemically vapor-infiltrated silicon carbide matrix systems, J. Am. Ceram. Soc., 82, 145 – 155, (1999).
11 Bertrand, S., Forio, P., Pailler, R., Lamon, J.: Hi-Nicalon/SiC minicomposites with (Pyrocarbon/SiC)n nanoscale multilayered interphases, J. Am. Ceram. Soc., 82, 2465 – 2473, (1999).
12 Chateau, C., Gélébart, L., Bornert, M., Crepin, J., Caldemaison, D., Boller, E., et al.: Experimental characterisation of damage in SiC/SiC minicomposites, EPJ Web of Conferences., 6, 20002, (2010).
13 Chateau, C., Gélébart, L., Bornert, M., Crépin, J., Boller, E., Sauder, C., et al.: In situ X-ray microtomography characterization of damage in SiCf/SiC minicomposites, Compos. Sci. Technol., 71, 916 – 924, (2011).
14 Maillet, E., Godin, N., R'Mili, M., Reynaud, P., Fantozzi, G., Lamon, J.: Damage monitoring and identification in SiC/SiC minicomposites using combined acousto-ultrasonics and acoustic emission, Compos. Part A., 57, 8 – 15, (2014).
15 Solti, J.P., Robertson, D.D., Mall, S.: Estimation of interfacial properties from hysteretic energy loss in unidirectional ceramic matrix composites, Adv. Compos. Mater., 9, 161 – 173, (2000).
16 Lissart, N., Lamon,J.: Damage and failure in ceramic matrix minicomposites: experimental study and model, Acta. Mater., 45, 1025 – 1044, (1997).
17 Curtin, W.A., Ahn, B.K., Takeda, N.: Modeling brittle and tough stress-strain behavior in unidirectional ceramic matrix composites, Acta. Mater., 46, 3409 – 3420, (1998).
18 Chongdu, C., Holmes, J.W., Barber, J.R.: Estimation of interfacial shear in ceramic composites from frictional heating measurements, J. Am. Ceram. Soc., 74, 2802 – 2808, (1991).
19 Chateau, C., Gélébart, L., Bornert, M., Crépin, J., Caldemaison, D., Sauder, C.: Modeling of damage in unidirectional ceramic matrix composites and multi-scale experimental validation on third generation SiC/SiC minicomposites, J. Mech. Phys. Solids., 63, 298 – 319, (2014).
20 Curtin, W.A., Ahn, B.K., Takeda, N.: Modeling brittle and tough stress-strain behavior in unidirectional ceramic matrix composites, Acta. Mater., 46, 3409 – 3420, (1998).
21 Weibull, W.: A statistical distribution function of wide applicability, J. Appl. Mech-T ASME., 18, 293 – 297, (1951).
22 Carpinteri, A., Spagnoli, A., Vantadori, S.: A fracture mechanics model for a composite beam with multiple reinforcements under cyclic bending, Int. J. Solids. Struct., 41, 5499 – 5515, (2004).
23 Gao, X., Zhang, S., Fang, G., Song, Y.: Distribution of slip regions on the fiber-matrix interface of ceramic matrix composites under arbitrary loading, J. Reinf. Plast. Comp., 34, 1713 – 1723, (2015).
24 Curtin, W.A.: Multiple matrix cracking in brittle matrix composites, Acta. Metal. Mater., 41, 1369 – 1377, (1993).
Copyright
Göller Verlag GmbH
