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Development of Compressive Flow Strength Testing for Gasket Materials
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English
Abstract
It is highly desirable to have a compression test of gasket materials (which are generally composites of fibers, fillers, and binders) since (1) a gasket tension testing (ANSI/ASTM F 152) does not represent the loading direction the material is used in service (anisotropic properties) and (2) there are generally significant differences between the tensile and compressive flow stress of composite materials. It is recognized that a compression test for axis-symmetric shapes is dominated by friction when low aspect ratio samples are used. It is predicted theoretically that when the sample aspect ratio approaches the interface coefficient of friction it may be possible to observe material flow in compression. Empirical observation of this fact has been made here and elsewhere. Typically the gasket industry relies on empirical relations between the maximum permissible compressive stress and gasket width-to-thickness ratios because different flow stresses are observed for the same material tested with different footprints. The application of a plane-strain compression test is discussed as a means to overcome the large friction effect in gasket compression tests. The plane-strain test offers the advantages of (1) loading the gasket in the service direction, (2) measuring the compressive rather than the tensile flow stress, and (3) largely eliminating concerns about sample edge damage during preparation since the compressed area is bounded by undeformed shoulders of the gasket sheet.
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Authors
Citation
Santner, J. and Wesley, A., "Development of Compressive Flow Strength Testing for Gasket Materials," SAE Technical Paper 950324, 1995, https://doi.org/10.4271/950324.Also In
References
- Pressley J. O. Stevenson R. W. Compression Behavior of Gasket Materials Under High Loading SAE International Congress Detroit, MI 1985 Paper Nos. 850188
- Macip-Garcia M. A. Extrusion Failure Test for Elastomeric Composites SAE International Congress Detroit, MI 1987 Paper 870007
- Willis H. Fatemi A. An Experimental Investigation of Compressive Behavior of a Gasket Material SAE International Congress Detroit, MI 1993 Paper Nos. 930119
- Proposed Test Method - Compressive Strength Characteristics of Gasket Materials ASTM Committee on Gaskets February 1993 Philadelphia, PA
- Workability Testing Techniques Dieter G. E. American Society for Metals Metals Park, OH 1984
- Backhofen W. A. Deformation Processing Addison Wesley Publishing Co. Reading, MA 1972
- Smith D.W. Elements of Powder Metallurgy , in Powder Metallurgy: Applications, Advantages, and Limitations Klar E. 1983 American Society for Metals Metals Park, OH
- Dieter G.E. Mechanical Metallurgy McGraw-Hill Book Co. Inc. New York 1961 484
- DePierre V. Male A.T. Mathematical Calibration of the Ring Test for Friction Studies in Flat Forging Operations, Part I. Experimental Evaluation Air Force Materials Laboratory, Technical Report Number AFML-TR-69-28 Part I October 1969
- Watts A. B. Ford H. Inst. Mech. Eng. 1955 169 1141
- Dieter G.E. Mechanical Metallurgy McGraw-Hill Book Co. Inc. New York 1961 482