PROCESS ZONE SIZE FAILURE CRITERION AND PROBABILISTIC FRACTURE ASSESSMENT CURVES FOR CERAMICS

被引：36

作者：

ANDO, K

KIM, BA

IWASA, M

OGURA, N

机构：

[1] Department of Energy Engineering, Yokohama National University, Yokohama

来源：

FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES | 1992年 / 15卷 / 02期

关键词：

D O I：

10.1111/j.1460-2695.1992.tb00044.x

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

Data of fracture toughness and fracture stress of ceramics, generally show considerable size effects and scatter. This presents problems for the integrity of structural ceramics. Fracture mechanics test results on Si3N4 and Al2O3 reveal a sensitivity to crack size and the necessity to invoke probabilistic concepts to evaluate their integrity. A new failure criterion is proposed here, based on the existence of a crack-tip process zone. A probabilistic failure assessment curve is also proposed to quantitatively evaluate reliability.

引用

页码：139 / 149

页数：11

共 18 条

[11]

Evans A.G., Faber K.T., Crack‐growth resistance of microcracking brittle materials, J. Am. Ceram. Soc., 67, pp. 255-260, (1984)

[12]

Kreher W., Pompe W., Increased fracture toughness of ceramics by energy‐dissipative mechanisms, J. Mater. Sci., 16, pp. 694-706, (1981)

[13]

Kim B.A., Ando K., Ogura N., Study on the development of failure assessment diagram for ceramics, Jap. Soc. mech. Engrs, 55-518, pp. 2138-2143, (1989)

[14]

Iwasa M., Ando K., Ogura N., Process zone size fracture criterion for ceramics, Transactions of the Japan Society of Mechanical Engineers Series A, 56-521, pp. 2353-2358, (1990)

[15]

Elastic‐plastic fracture mechanics, Developments in Fracture Mechanics–I, (1979)

[16]

Newman J.C., Raju I.S., An empirical stress‐intensity factor equations for the surface crack, Engng Fract. Mech., 15, pp. 185-192, (1981)

[17]

Shah R.C., Kobayashi A.S., Stress intensity factor for an elliptical crack approaching the surface of a plate in bending, pp. 3-21, (1972)

[18]

Suzuki K., Tanaka K., Yamamoto Y., Nakagawa H., Effect of grinding residual stress on bending strength of ceramics, J. Jap. Soc. Mater. Sci., 38-429, pp. 582-588, (1989)

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