摘要
对带缺口构件疲劳寿命的构成、缺口疲劳裂纹萌生尺寸的定义、缺口疲劳寿命的局部应力估算方法、影响萌生寿命N_i的主要因素、缺口疲劳寿命及锐缺口疲劳裂纹萌生寿命的研究现状等进行了简要综述,同时介绍了一种萌生寿命N_i的新的表征参量△K/ρ^(1/2),以及N_i的估算方法。最后指出了控制缺口疲劳裂纹萌生寿命的主要参量以及它们之间存在的关系等亟待解决的问题与今后的发展趋势。
It is summaried briefly that composition of fatigue life for notched components, define of notch fatigue crack initiation size, local stress estimate method of notch fatigue life, main factors affected initiation life Ni, research status of fatigue life for notch and fatigue crack initiation life for sharp notch. A new descriptive parameter △K/ρ1/2 for initiation life Ni and a method to estimate Ni are introduced. At last the mainly decisive parameters of notch fatigue crack initiation life and relationship between them as well as future trend are pointed out.
出处
《机械工程材料》
CAS
CSCD
北大核心
2011年第3期1-3,31,共4页
Materials For Mechanical Engineering
基金
中石化科研资助项目(X503018)
关键词
缺口
疲劳寿命
裂纹
萌生
notch
fatigue life
crack
initiation
