摘要
选取带有V型缺口45钢试样,通过控制加载过程中的应变幅,研究缺口对试样疲劳寿命的影响。并应用低周疲劳寿命预测理论,提出了修正的Manson寿命预测模型,用来预测带有V型缺口中45钢的低周疲劳寿命。模型的预测结果和试验结果吻合很好。
By controlling the amplitude value of strain during the process of loading, taking 45 steel with precut V-notch as the subject investigated, studying the notch effect on fatigue life of round bar, and applying the knowledge of the life prediction theory on ductile materials in low cycle fatigue, the amended Manson equation and algorithm of the estimating-life model was proposed. The predicted curves and strain-life curves well agree with experimental data for medium carbon steel.
出处
《机械工程材料》
CAS
CSCD
北大核心
2007年第6期26-29,共4页
Materials For Mechanical Engineering
关键词
低周疲劳
缺口试样
旋转弯曲
寿命预测
low cycle fatigue
notch specimen
rotational bending
life prediction
