Matchstick and coin shaped specimens are used to determine the material strength consistency and mean fracture strength under five different stress rations, using Weibull statistics.
Many practical loading modes of these simple shapes are assessed. For the best, the necessary experimental work and results of the analyses are presented and illustrated for as-fired reaction-bonded silicon nitride (RBSN) tested at room-temperature.
Get full access to this article
View all access options for this article.
References
1.
StanleyP.FesslerH.SivillA. D.‘An engineer's approach to the prediction of failure probability of brittle components’, Proc. Br. Ceram. Soc., 1973, 22, 453.
2.
StanleyP.SivillA. D.FesslerH.‘Application of the four function Weibull equation in the design of brittle components’, Fracture mechanics of ceramics, 1978 (Plenum Press, New York), Vol. 3, pp. 51–66.
3.
StanleyP.SivillA. D.FesslerH.‘The unit strength concept in the interpretation of beam test results for brittle materials’, Proc. Instn mech. Engrs, 1976, 190 49/76, 585.
4.
StanleyP.SivillA. D.FesslerH.‘The application and confirmation of a predictive technique for the fracture of brittle components’, Proc. 5th Int. Conf. on Experimental Stress Analysis, 1974 (CISM, Udine), 2.42.
5.
FesslerH.FrickerD. C.GodfreyD. J.‘A comparative study of the mechanical strength of reaction-bonded silicon nitride’, Ceramics for high-performance applications III: Reliability, 1983 (Plenum Press, New York).
6.
FrickerD. C.Failure predictions for ceramic gas turbine components under mechanical loading, PhD thesis, Nottingham University, 1979.
7.
TimoshenkoS. P.Woinowsky-KriegerS.Theory of plates and shells, 1959 (McGraw-Hill Kogakusha, Tokyo), pp. 282–295.
8.
RadzimovskyE. I.‘Stress distribution and strength condition of two rolling cylinders pressed together’, University of Illinois Eng. Exp. Station, 1953, Bulletin No. 408.
9.
ChauF. S.Failure prediction of ceramic components under thermal loading, PhD thesis, Nottingham University, 1978.
10.
TimoshenkoS. P.GoodierJ. N.Theory of elasticity, 1970 (McGraw-Hill Kogakusha, Tokyo), p. 116.
11.
TimoshenkoS. P.GoodierJ. N.Theory of elasticity, 1970 (McGraw-Hill Kogakusha, Tokyo), pp. 83–88.
12.
TimoshenkoS. P.Woinowsky-KreigerS.op. cit., pp. 51–53, 63–67.
13.
FesslerH.FrickerD. C.‘A theoretical analysis of the ring-on-ring loading disc test’, J. Amer. Ceram. Soc., 1984 to be published.
14.
FesslerH.FrickerD. C.‘Friction at broad and narrow contacts between silicon nitride and hardened steel’, Proc. Br. Ceram. Soc., 1984, to be published.
15.
TimoshenkoS. P.GoodierJ. N.op. cit., pp. 309–313.
16.
HondrosG.‘Poisson's ratio and elastic modulus by Brazillian test’, Australian J. Appl. Sci., 1959, 10, 265.
17.
StanleyP.SivillA. D.‘On the biaxial fracture strength of reaction-bonded silicon nitride’, Proc. Br. Ceram. Soc., 1978, 26, 97.
18.
SinesG.AdamsM.‘The use of brittle materials as compressive structural elements’, ASME Paper No. 75-DE-23, 1975.
