Abstract
Residual stresses evolve in ceramic fiber composites during cool down from a stress free state. These stresses play a very important role in the overall mechanical behaviour of the composites, and may lead to microcracking by themselves or when aided by thermomechanical loadings. In this paper, the residual stresses in unidirectional fiber composites are computed by the three dimensional finite element analysis. We investigate the effect of fiber volume fraction and fiber distribution effects such as fibers touching and fibers enclosing matrix (short range effects) as well as matrix and fiber rich domains (long range effects). The effect of thermal expansion mismatch is studied by examining two ceramic composite systems: SiC fibers (Nicalon) reinforced by LithiumAluminumSilicate (LAS) and CalciumAluminumSilicate (CAS) glass-ceramics. It is shown that the residual stress state varies with fiber distribution: The analysis of small range effects shows that the local stresses may differ considerably from the average stresses. The analysis of long range effects shows that the residual stress states are affected both inside and outside the domains. Due to differences in the thermal expansion mismatch, the residual stress state in SiClLAS and Sic/CAS are very different. Therefore, different damage modes are expected in the two systems. Partial debonding is likely in SiC/LAS at locations where fibers are in contact, whereas matrix cracks may initiate in Sic/CAS.
This is a preview of subscription content, log in via an institution to check access.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
References
Hashin Z., Analysis of Composite Materials — a Survey. J. Appl. Mech., 1983, 50, 481–505.
Hsueh C.-H., Becker P.F., Thermal Expansion Coefficients of Unidirectional Fiber-Reinforced Ceramics, J. Am. Ceram. Soc., 1988, 71, C438–41. Correction, J.Am. Ceram. Soc., 1989, 72, 359.
Mikata Y., Taya M., Stress Field in a coated Continuous Fiber Composite subjected to Thermo-Mechanical Loadings, J. Compo Mats, 1985, 19, 554–78.
Chen T., Dvorak G.J., Benveniste Y., Thermal stresses in coated fiber composites. Symp. High Temp. Comp. 1989, 139–47.
Böhm H.J., Rammerstorfer F.G., Micromechanical Investigation of the Processing and Loading of Fibre-Reinforced Metal Matrix Composites Mats. Sci. Eng. 1991, A135, 185–8.
Zhu H., Achenbach J.D., Effect of Fiber-Matrix Interphase Defect at Micro Stress State at Neighbouring Fibers, J. Comp. Mats 1991, 25, 224–38.
Zhu H., Achenbach J.D., Radial Matrix cracking and Interphase Failure in Transversely Loaded Fibre Composite, Mech. of Mats. 1991 (submitted)
Adams, D.F., Tsai S.W., The influence of Random Filament Packing on the Transverse Stiffness of Unidirectional Composites, J. Comp. Mats., 1969, 3, 368–81.
Brockenbrough J.R., Suresh S., Wienecke H.A., Deformation of metal Matrix Composites with Continuous Fibers: Geometrical Effects of Fiber Distribution and Shape, Acta Metall. Mater., 1991, 39, 735–52.
Bonney L.A., Cooper R.F., Reaction Layer Interfaces in SiC-Fiber-Reinforced Glass-Ceramics: A High-Resolution Scanning Transmission Electron Microscopy Analysis J. Am. Ceram. Soc., 1990, 73, 2916–26.
Evans A.G., Marshall D.B., The Mechanical Behaviour of Ceramic Matrix Composites, Acta Metall., 37, 2567–83.
Karandikar P., Talreja R., Chou T.-W., Evolution of Damage and Mechanical Response of Ceramic Matrix Composites, J. Mats. Sci., 1991 (submitted)
FEMGEN Users Manual version 8.6, 1987, Femgen AB, Lund, Sweden
Bischoff E., Rühle M., Sbaizero O., Evans A.G., Microstructural Studies of the Interface Zone of a SiC-Fiber-Reinforced Lithium Aluminum Silicate Glass-Ceramic, J. Am. Ceram. Soc., 1989, 72, 741–5.
Charalambides P.G., Evans A.G., Debonding Properties of Residual Stressed Brittle Matrix Composites, J. Am. Ceram. Soc., 1989, 27, 746–53.
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 1992 Elsevier Science Publishers Ltd and MPA Stuttgart
About this chapter
Cite this chapter
Sørensen, B.F., Talreja, R., Sørensen, O.T. (1992). Residual Stresses in Ceramic Fiber Composites: Effect of Non-Uniform Fiber Distribution. In: Carlsson, R., Johansson, T., Kahlman, L. (eds) 4th International Symposium on Ceramic Materials and Components for Engines. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-2882-7_82
Download citation
DOI: https://doi.org/10.1007/978-94-011-2882-7_82
Publisher Name: Springer, Dordrecht
Print ISBN: 978-1-85166-776-5
Online ISBN: 978-94-011-2882-7
eBook Packages: Springer Book Archive