| 扭转条件下过渡圆角半径及径比对圆轴疲劳寿命的影响 |
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| 引用本文： | 李有堂,于立群. 扭转条件下过渡圆角半径及径比对圆轴疲劳寿命的影响[J]. 兰州理工大学学报, 2008, 34(5) |
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| 作者姓名： | 李有堂 于立群 |
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| 作者单位： | 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;兰州理工大学,机电工程学院,甘肃,兰州,730050 |
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| 摘 要： | 提出应用局部应力应变法计算疲劳寿命的原理.建立不同圆角半径和径比圆轴的有限元计算模型,利用ANSYS软件计算纯扭转条件下过渡圆角处的局部应力、应变;应用局部应力应变法计算对称循环载荷谱下的疲劳裂纹萌生寿命;绘制寿命随圆角半径和径比变化的曲线图.计算分析结果表明,疲劳裂纹的形成寿命随着过渡圆角半径的变大而增长,随着径比的增大而呈下降趋势,径比越大,过渡圆角半径越小,疲劳裂纹的形成寿命越短.
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| 关 键 词： | 疲劳寿命 扭转 圆角半径 径比 有限元法 局部应力应变法 |
Influence of radius of rounded corner of stepped shafts and radius ratio on fatigue life of shafts subjected to torsion |
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| LI You-tang,YU Li-qun. Influence of radius of rounded corner of stepped shafts and radius ratio on fatigue life of shafts subjected to torsion[J]. Journal of Lanzhou University of Technology, 2008, 34(5) |
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| Authors: | LI You-tang YU Li-qun |
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| Affiliation: | LI You-tang1,2,YU Li-qun2(1.Key Laboratory of Digital Manufacturing Technology , Application,The Ministry of Education,Lanzhou Univ.of Tech.,Lanzhou730050,China,2.College of Mechano-Electronic Engineering,Lanzhou 730050,China) |
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| Abstract: | The principle of fatigue life computation was presented on the basis of local stress-strain method and the finite element model of stepped shafts with different radii of rounded corner and radius ratios was set up.The local stress and strain at the rounded corners on the shafts subjected to pure torsional loading were computed by using the software ANSYS.The fatigue crack initiation lives under symmetric cyclic load were determined with the method of local stress-strain approach.The results showed that the ... |
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| Keywords: | fatigue initiation life torsion radius of rounded corner radius ratio finite element method local stress-strain method |
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