陶瓷材料的抗扭切口强度与表达式

Torsion Notch Strength and Expression of Ceramic Materials

根据受扭矩圆柱体中的应力分析和Griffith脆断强度理论,提出了脆性材料的抗扭切口强度表达式。根据此式和Al2O3陶瓷管抗扭强度的正态分布参数,可以求得带存活率的抗扭切口强度表达式,并进行了验证。还提出了处理来自不同试验室的Al2O3陶瓷管抗扭强度和抗扭切口强度试验数据的思路和方法。结果表明:此试验数据处理的思路和方法是可行的。

The expression for torsion notch strength of ceramic materials was proposed based on the stress analysis of a cylinder under torsion and the theory of brittle fracture strength due to Griffith.Then,the expressions for torsion notch strength with given survivability for Al_2O_3 tubes could be predicted from the normal distribution parameters by using the expression mentioned above.Besides,the procedures for treating test data of torsion fracture strength and notch strength of Al_2O_3 tubes from different labs were given and shown to be applicable.