摘要
为了研究汽车用钢DC53D+ZF的疲劳性能,在不同的最大应力条件下,利用高频疲劳试验机测试疲劳性能。在常温空气环境下,对试样进行了拉-拉疲劳试验(应力比R=0.15)。试验采用正弦波进行波动循环加载直到试样发生断裂,测得试样不同应力水平下的循环次数、应力幅等,DC53D+ZF的疲劳强度下极限为222.4MPa。对DC53D+ZF疲劳数据进行了相应的处理,得到了该汽车用钢的S-N曲线,补充了车身常用钢疲劳特性数据,能够为汽车厂疲劳仿真分析提供可靠的数据基础,预测汽车部件的设计寿命。
In order to study the fatigue properties of automotive steel DC53D＋ZF, the fatigue performance was measured by the high frequency fatigue testing machine under different maximum stress conditions. The tensile test was carried out at room temperature and air environment. The sine wave was used for the cyclic loading until the specimen was broken, and the number of cycles and the stress amplitude of the specimen under different stress levels were measured. The limit of fatigue strength of DC53D＋ZF was 222.4 MPa. Based on the corresponding process- ing of the fatigue data of DC53D＋ZF, the lower limit data of the S-N curve of the automobile steel was obtained. The data can complement the common fatigue properties of automobile steels and provide a reliable data base for the fatigue analysis of automobile plants to predict the design life of automotive components.
出处
《中国冶金》
CAS
2017年第11期57-60,共4页
China Metallurgy
关键词
汽车用钢
高频疲劳
循环次数
疲劳特性
S-N曲线
automotive steel
high frequency fatigue
cycle times
fatigue properties
S-N curve
