临床口腔医学杂志Issue(7)：390-392,3.DOI:10.3969/j.issn.1003-1634.2015.07.003
IPS－Empress2玻璃陶瓷复层结构亚临界裂纹扩展研究
Subcritical crack growth of IPS-Empress 2 Glass-Ceramics layers structures
摘要
Abstract
Objective:Evaluate subcritical crack growth (SCG) of IPS-Empress2 layers structures. Method:Bar-shaped specimens of IPS-Empress2 layers structures (n=30) were fabricated and loaded in three-point bending (3p) and cyclic fatigued.The initialσ and the number of cycles to fracture were obtained from (3p)and F tests,respectively.Data was examined using Weibull statistics.Use the empirical law of paris to analysize the SCG ,the behavior of which was described in terms of crack velocity as a function of stress intensity factor(K1). Result:The Weibull moduli of IA was 7.7, IA was prone to SCG,with crack propagation occurring at K1 as low as 52 % of its critical stress intensity factor (KIC). Conclusion:IPS-Empress2 layers structures cause pronounced SCG under cyclic loading.关键词
热压铸造陶瓷/层状复合结构/循环疲劳/亚临界裂纹扩展Key words
Heat press ceramic/layers sturctures/cyclic fatigue/subcritical crack growth分类
医药卫生引用本文复制引用
张志升,姚江武,苏剑生,刘伟才..IPS－Empress2玻璃陶瓷复层结构亚临界裂纹扩展研究[J].临床口腔医学杂志,2015,(7):390-392,3.基金项目
福建省卫生厅青年科研项目 （）
