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无机材料学报

无机材料学报

• 研究论文 • 上一篇    下一篇

钙钠玻璃的循环疲劳强度预测

吕宝桐   

  1. 西北工业大学材料科学与工程学院; 西安710072
  • 收稿日期:1996-09-09 修回日期:1996-11-05 出版日期:1997-10-20 网络出版日期:1997-10-20

Cyclic Fatigue Strength Prediction of Soda-lime Glass

LU Baotong   

  1. College of Materials Science and Engineering Northwestern Polytechnical UniversityXi an 710072 China
  • Received:1996-09-09 Revised:1996-11-05 Published:1997-10-20 Online:1997-10-20

PDF (PC)

955

被引次数

6

摘要： 本文提出了一种表征及预测钙钠玻璃光滑和缺口试件在不同载荷条件下疲劳强度的通用方法．因钙钠玻璃中不存在有效的裂纹屏蔽机制，循环载荷在钙销玻璃中不会造成明显的附加损伤，亚临界裂纹扩展受应力腐蚀机制控制，循环疲劳寿命与加载频率无关．缺口试件的缺口疲劳系数Kf与其应力集中系数Kt近似相等．采用文中定义的等效应力做为力学参量，可将光滑及缺口试件在不同加载条件下的SPT图归一化．

关键词: 玻璃, 疲劳, 缺口, 裂纹, 强度, 寿命

Abstract: A general procedure to predict the both unnotched and notched fatigue strength of soda-lime glass under different loading modes is given on
the basis of the cyclic fatigue behavior of the material. Because there no effective crack-shielding mechanism exists in soda-lime glass, the cyclic loading produces no
additional damage in the material. The fatigue notch factor Kf of notched specimens is approximately equal to the theoretical stress concentration factor Kt of the specimens. A
general strength-probability-time(SPT) diagram can be obtained according to the concept of equivalent stress σeq, in which the both effects of notch and loading-modes are
taken into account.

Key words: glass, cyclic fatigue, notch, crack, strength, lifetime