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Threshold Crack Size in A Pyrolytic Carbon for no Growth Under Cyclic Stress

Published online by Cambridge University Press:  15 February 2011

M A Ling ,
George H. Sines  and
C. Barclay Gilpin
M A Ling
Affiliation:
Department of Materials Science and EngineeringUniversity of California, Los Angeles, CA 90095, USA
George H. Sines
Affiliation:
Department of Materials Science and EngineeringUniversity of California, Los Angeles, CA 90095, USA
C. Barclay Gilpin
Affiliation:
Department of Mechanical EngineeringCalifornia State University, Long Beach, CA 90840, USA
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Abstract

In this work, the fracture toughness of monolithic pyrolytic carbon and sandwich composites of this carbon on a graphite substrate were measured by a disk-shaped compact specimen and by using a tensile specimen. On this material, a large number of specimens that had small cracks induced by a Vickers diamond indenter were tested under cyclic stress. The existence of a true threshold stress intensity factor range for non-propagation of the cracks was demonstrated. Statistical confidence on pre-cracked specimens was obtained through testing a large number of specimens to a very long lifetime of the order of 109 cycles.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 383: Symposium I – Mechanical Behavior of Diamond and Other Forms of Carbon , 1995 , 273
Copyright
Copyright © Materials Research Society 1995

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References

Referenes

1. Schoen, F. J., Carbon, 11, 413 (1973).Google Scholar
2. Shim, H. S., Biomaterials, Medical Devices and Artificial Organs, 2 (1), 55–65 (1974).Google Scholar
3. Bokros, J. C., Haubold, A. D., Akins, R. J., Campbell, L. A., Griffin, C. D. and Lane, E., in Replacement Cardiac Valves, edited by Bodnar, E. and Frater, R. W. M. (Pergamon Press, New York, 1991), pp. 21–48.Google Scholar
4. Ma, L. and Sines, G., “Fatigue of Isotropic Pyrolytic Carbon Used in Implanted Mechanical Heart Valves”, submitted to The Journal of Heart Valve Disease.Google Scholar
5. Ma, L. and Sines, G., Materials Letters, 17, 49, (1993).Google Scholar
6. Gilpin, C. B., Haubold, A. D. and Ely, J. L. in Bioceramics 6, edited by Ducheyne, P. and Christiansen, D. (Proceedings of the 6th International Symposium on Ceramics in Medicine, Philadelphia, PA, 1993) pp. 217–223.Google Scholar
7. Packman, P. F., Klima, S. J., Davies, R. L., Malpani, J., Moyzis, J., Walker, W., Yee, B. G.W. and Johnson, D. P., Metals Handbook: Nondestructive Inspection and Quality Control, Vol.11, (American Society for Metals, Metals Park, OH, 1976), pp. 414–424.Google Scholar
8. Rooke, D. P. & Cartwright, D. J., Compendium of Stress Intensity Factors, (Her Majesty's Stationary Office, London, 1976), p. 14.Google Scholar
9. Isida, M., International Journal of Fracture Mechanics, 7 (3), 301 (1971).Google Scholar
10. Ritchie, R. O., Dauskardt, R. H. and Yu, Weikang, Journal of Biomedical Materials Research, 24, 189 (1990).Google Scholar
11. “Standard Test Method for Measurement of Fatigue Crack Growth Rates, E 647–93,” Annual Book of ASTM Standards: Metals Test Methods and Analytical Procedures, 03.01, (ASTM, Philadelphia, 1993), p. 679.Google Scholar