A comparison of failure predictions by strength and fracture mechanics techniques
A comparison of failure predictions by strength and fracture mechanics techniques
复制标题
通过强度和断裂力学技术进行失效预测的比较
DOI：
10.1007/bf00752234
复制
发表时间：
1982
影响因子：
4.5
通讯作者：
S. Wiederhorn
中科院分区：
文献类型：
--
作者：
B. Pletka;S. Wiederhorn
利用强度和断裂力学技术对五种陶瓷材料的载荷寿命进行了预测。采用双扭转技术获得断裂力学数据，采用应力速率技术获得强度数据。基于误差传播规律进行误差分析，确定故障预测的置信限。只有两种材料的应力速率和断裂力学技术的寿命预测是一致的。讨论了这些结果对裂纹扩展和设计应用的微观结构影响的意义。
Predictions of lifetime under load were made for five ceramic materials using strength and fracture mechanics techniques. The double-torsion technique was used to obtain fracture mechanics data, while the stressing-rate technique was used to obtain strength data. An error analysis based on the error propagation law was performed to determine confidence limits for the failure predictions. Agreement of lifetime predictions by the stressing-rate and fracture mechanics techniques were obtained for only two of the materials. The implications of these results with regard to microstructural effects on crack propagation and design applications are discussed.