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Measurement of Biaxial Compressive Strength of Cordierite Ceramic Honeycombs
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English
Abstract
The stringent durability requirements approaching 100,000 vehicle miles for automotive substrates and 290,000 vehicle miles for large frontal area diesel substrates for 1994+ model year vehicles call for advanced packaging designs with thick ceramic mats and high mount densities. The latter result in high mounting pressure on the substrate and enhance its mechanical integrity against engine vibrations, road shocks and back pressure forces. A novel measurement technique which applies a uniform biaxial compressive load on the lateral surface of ceramic substrates, thereby simulating canning loads, is described. The biaxial compressive strength data obtained in this manner help determine the maximum mounting pressure and mat density for a durable packaging design. The biaxial compressive strength data for both round and non round substrates with small and large frontal area are presented. This is followed by a comparison of biaxial compressive strength with the triaxial compressive strength and uniaxial compressive strength along the B-axis. It is demonstrated that the B-axis crush strength based on a simple test geometry and efficient test procedure correlates well with the biaxial compressive strength. Improvements in biaxial compressive strength measurement technique are also discussed.
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Authors
Citation
Gulati, S. and Reddy, K., "Measurement of Biaxial Compressive Strength of Cordierite Ceramic Honeycombs," SAE Technical Paper 930165, 1993, https://doi.org/10.4271/930165.Also In
References
- Gulati S.T. “Design Considerations for Diesel Flow-Through Converters,” SAE Paper No. 920145 Detroit, MI February 1992
- Gulati S.T. “Physical Durability of Catalyst Supports in Harsh Environments,” 25th ISATA Conference Florence, Italy June 1992
- Gulati S.T. Pujari V.K. “Mechanical Integrity of Ceramic Monolithic Converters,” SAE Paper No. 811324 Detroit, MI November 1981
- Gulati S.T. “New Developments in Catalytic Converter Durability,” Proc. CAPoC-2 Conference Brussels September 1990
- Weibull W. “A Statistical Distribution Function of Wide Applicability,” J. App. Mech. 1951
- Metals Handbook 1 Properties and Selection of Metals Am. Soc. Metals Metals Park, OH 1961
- Gulati, S. T. Ten Eyck J. Lebold A. “Durable Packaging Design for Cordierite Ceramic Catalysts for Motorcycle Application,” SAE Paper No. 930161 March 1993
- Gulati S. T. “Strength of Cordierite Honeycomb Ceramics,” 1987 Annual Meeting of Am. Ceram. Soc. Pittsburgh, PA
- Gulati S. T. “Cell Design for Ceramic Monoliths for Catalytic Converter Application,” SAE Paper No. 881685 October 1988
- Gulati, S.T. Ten Eyck J. Lebold A. “New Developments in Packaging of Ceramic Honeycomb Catalysts,” SAE Paper No. 922252 October 1992
- Timoshenko S.P. Goodier J.N. Theory of Elasticity 3rd McGraw-Hill, New York 1970
- Gulati S.T. Chen D.K.S. “Isostatic Strength of Porous Cordierite Ceramic Monoliths,” SAE Paper No. 910375 Detroit, MI February 1991