| 钙钠玻璃的循环疲劳强度预测 |
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| 引用本文： | 吕宝桐.钙钠玻璃的循环疲劳强度预测[J].无机材料学报,1997,12(5):655-658. |
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| 作者姓名： | 吕宝桐 |
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| 作者单位： | 西北工业大学材料科学与工程学院; 西安710072 |
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| 基金项目： | 航空科学基金!94G53181，陕西省自然科学基金!95C17 |
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| 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．
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| 关 键 词： | 玻璃 疲劳 缺口 裂纹 强度 寿命 |
| 收稿时间： | 1996-9-9 |
| 修稿时间： | 1996-11-5 |
Cyclic Fatigue Strength Prediction of Soda-lime Glass |
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| LU Baotong.Cyclic Fatigue Strength Prediction of Soda-lime Glass[J].Journal of Inorganic Materials,1997,12(5):655-658. |
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| Authors: | LU Baotong |
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| Affiliation: | College of Materials Science and Engineering Northwestern Polytechnical UniversityXi an 710072 China |
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| 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. |
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| Keywords: | glass cyclic fatigue notch crack strength lifetime |
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