The Classification of Disposable Mechanical Elements
Disposable mechanical elements with extremely short lives are widely used in the aerospace and defense fields.To reliably evaluate the life of disposable mechanical elements,many attentions were concentrated in the fatigue properties of disposable mechanical elements.According to the different meanings of static strength for metals,disposable mechanical elements are divided into two groups with different fatigue properties:extremely low cycle fatigue module for Type Ⅰ with ultimate strength as design stress and low cycle fatigue module for Type Ⅱ with yield strength as design stress.The Kuroda model and a cumulative damage model consisting of the Miners rule and the sequential law are used in the fatigue design process of the Type Ⅰ.To the Type Ⅱ,the Manson-Coffin model is suitable for conventional applications but more attempts are still conducted to further improve stress levels.The Type Ⅱ with increasing load sequences are specially treated,since the cyclic yield strength of certain materials under pulsating stress closing to the yield strength increase with the deepening of fatigue damage.Consequently,under the increasing pulsating cyclic loading,the later load whose amplitude is higher than the initial yield strength will be permitted.
Disposable Mechanical Elements Cyclic Yield Strength Mechanical Design Criteria
Yuefeng Li Xudong Pan Guanglin Wang
School of Mechatronics Engineering, Harbin Institute of Technology, Harbin, China
国际会议
台湾
英文
86-90
2012-03-23（万方平台首次上网日期，不代表论文的发表时间）