Effect of Stress Concentration on the Bending Fracture Stress of Polycrystalline Alumina.

被引：0
|
作者：
Heckel, Klaus
Maier, Horst R.
机构：
来源：
Berichte der Deutschen Keramischen Gesellschaft | 1973年 / 50卷 / 12期
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中图分类号：
TQ17 [硅酸盐工业];
学科分类号：
0805 ; 080502 ;
摘要：
The effect of the stress concentration on the bending fracture stress has been investigated with circular notched round bar specimens under 4-point-bending loading. Polycrystalline alumina of a purity of 99. 5% Al//2O//3 varied in the ranges of grain size 1 to 65 mu m and porosity 2 to 33% has been applied. All investigations had been made at room temperature within normal environment. The results can be explained qualitatively by the rho -theory of Neuber and the statistical theory of Weibull. The rho -theory represents a useful approximation only for stress concentration within the range of large porosity and grain size.
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页码：361 / 364
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