基于临界面法的缺口件多轴疲劳寿命预测.pdf

Journal of Mechanical Strength 机械强度 2003 ,25(2) :212~214
基于临界面法的缺口件多轴疲劳寿命预测 X
MULTIAXIAL FATIGUE LIFE PREDICTION FOR NOTCHED SPECIMENS
BASED ON THE CRITICAL PLANE APPROACH
尚德广XX 王大康李明
(北京工业大学机电学院,北京 100022)
SHAN G Deguang WAN G Dakang LI Ming
( College of Mechanical Engineering and Applied Electronics Technology , Beijing Polytechnic University ,Beijing 100022 , China)
摘要基于多轴损伤临界面原理,根据多轴疲劳损伤和裂纹萌生与扩展的特点,在所建立的统一型多轴疲劳损伤模
型的基础上,进一步推广应用到缺口件的多轴疲劳寿命预测中。经多轴疲劳试验验证表明, 所建立的多轴疲劳损伤模
型可以较好地预测比例与非比例加载下缺口件的多轴疲劳寿命。
关键词多轴疲劳临界面法缺口件寿命预测
中图分类号 TH114 O346. 2
Abstract On the basis of the critical plane approach and the characteristics of multiaxial fatigue damage and the crack initiation
and growth , a unify multiaxial fatigue damage parameter based on the shear form is proposed bining the behavior of the multiaxial
fatigue damage and the crack initiation and propagation. The proposed multiaxial fatigue damage parameter is developed to predict mul2
tiaxial fatigue life prediction for notched specimens. It is shown by multiaxial fatigue experimental verification that the proposed multiaxial
fatigue damage parameter can be used for multiaxial fatigue life prediction of notched specimens.
Key words Multiaxial fatigue ; Critical plane approach; Notched specimens; Life prediction
Correspondent : SHANG Deguang , E2mail : shangdg ***@bjpu. edu. cn , Fax : + 86 - 10 - 67391