陶瓷材料的抗扭切口强度与表达式  

Torsion Notch Strength and Expression of Ceramic Materials

作　　者：郑修麟[1] 王泓[1] 鄢君辉[1] 赵康[2] 

机构地区：[1]西北工业大学材料科学与工程学院,陕西西安710072 [2]西安理工大学材料科学与工程学院,陕西西安710048

出　　处：《机械工程材料》2004年第4期4-6,共3页Materials For Mechanical Engineering

基　　金：国防科技预研基金资助项目(97J12.1.9HK0317)

摘　　要：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.

关 键 词：脆性断裂 AL2O3陶瓷 抗扭切口强度 存活率 

分 类 号：TB301[一般工业技术—材料科学与工程]