| U型切口中缺口参数对轴类件疲劳寿命的影响 |
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| 引用本文： | 李有堂,李全宝.U型切口中缺口参数对轴类件疲劳寿命的影响[J].甘肃科学学报,2010,22(3):84-87. |
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| 作者姓名： | 李有堂 李全宝 |
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| 作者单位： | 1. 兰州理工大学,数字制造技术与应用省部共建教育部重点实验室,甘肃,兰州,730050;兰州理工大学,机电工程学院,甘肃,兰州,730050
2. 兰州理工大学,机电工程学院,甘肃,兰州,730050 |
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| 基金项目： | 教育部重点科研项目:基于产品全寿命管理的抗疲劳设计模型与准则 |
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| 摘 要： | 应用局部应力应变法基本原理,提出通过裂纹萌生和扩展求解轴类件疲劳寿命的计算方法.建立U型切口轴疲劳寿命的计算模型,应用Ansys11.0有限元分析软件,分析扭转载荷下,U型切口参数对轴的疲劳寿命的影响,得到切口圆角半径、缺口深度对轴的疲劳寿命的影响曲线.引入径宽比参量k求得圆角半径的最佳取值范围.结果表明:U型切口圆角半径存在最优值,解决了U型切口圆角半径取值问题.
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| 关 键 词： | 轴 U型切口 缺口参数 疲劳寿命 局部应力应变法 有限元法 |
Effect of Incision Parameters of U-shape Notch on Fatigue Life of Shafts |
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| LI You-tang,LI Quan-bao.Effect of Incision Parameters of U-shape Notch on Fatigue Life of Shafts[J].Journal of Gansu Sciences,2010,22(3):84-87. |
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| Authors: | LI You-tang LI Quan-bao |
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| Institution: | b(Key Laboratory of Digital Manufacturing Technology and Application,the Ministry of Educationa,School of Mechanical Engineeringb,Lanzhou University of Science and Technology,Lanzhou 730050,China) |
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| Abstract: | Based on the basic principle of the local stress-strain method,we put forward a new method to calculate the fatigue life of the shaft at its crack initiation and expansion.By establishing the relevant model of calculation and making use of the finite element software Ansys11.0,we studied the effect of incision parameters of U-shaped notch on the fatigue life of the shaft under torsional loading.The path-width ratio parameter k was introduced and the best range of the radius was obtained.The results showed that the fillet radius of the notch had an optimal value,thus having the value problem solved. |
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| Keywords: | shaft U-shaped notch incision parameters fatigue life local stress-strain method finite element method |
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