Notch strength of ceramics and statistical analysis

In the present study, experiments are carried out to measure the notch strength of alumina ceramics. Test results show that the notch strength of ceramics, σ N, follows the normal distribution and the flexible strength of ceramics, σ bb, also follows the normal distribution. Analysis of the test res...

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Bibliographic Details
Published in:Engineering fracture mechanics 1995-11, Vol.52 (5), p.917-921
Main Authors: Wang, Fenghu, Zheng, X.-L., Lu, M.X.
Format: Article
Language:English
Subjects:
Condensed matter: structure, mechanical and thermal properties
Exact sciences and technology
Fatigue, brittleness, fracture, and cracks
Mechanical and acoustical properties of condensed matter
Mechanical properties of solids
Physics
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Summary:In the present study, experiments are carried out to measure the notch strength of alumina ceramics. Test results show that the notch strength of ceramics, σ N, follows the normal distribution and the flexible strength of ceramics, σ bb, also follows the normal distribution. Analysis of the test results of the notch strength of ceramics shows that there is a correlation between the mean values of the notch and flexible strength of K t· σ N = σ bb, and the product of the standard deviation of the notch strength, s N and the stress concentration factor, K t, is equal to s f, the standard deviation of the flexible strength, i.e. K t s N = s f. As a result, the probability distribution of the notch strength can be predicted from that of the flexible strength of ceramics tested under identical conditions.
ISSN:0013-7944
1873-7315
DOI:10.1016/0013-7944(95)00071-3