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1)  fatigue notch factor
疲劳缺口系数
1.
A new calculation formula of fatigue notch factor of structural steel is presented.
提出一个新的结构钢疲劳缺口系数计算公式。
2.
In this paper the definition and the primary influence of fatigue notch factor are discussed,and some expressions of fatigue notch factor which are recently and commonly used are briefly reviewed.
对疲劳缺口系数Ｋｆ的定义和影响因素进行了全面综述，对目前已被普遍接受和广泛使用的一些典型Ｋｆ表达式作了系统的回顾和评述。
3.
According to the environment characteristics and corrosion depth distribution law of the naval aircraft structures fatigue notch factor ( K f ) and fatigue life mathematical model was built by using the Stress Field Intensity (SFI) and Local Stress strain methods.
依据海军现役飞机的腐蚀环境特点及结构件腐蚀损伤深度拟合规律 ,采用应力场强法和局部应力应变法分别对疲劳缺口系数Kf 及疲劳寿命计算模型进行了分析 ,提出了一种腐蚀环境下飞机结构疲劳寿命的评定方法。
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2)  fatigue notch factor Kf
疲劳缺口系数Kf
3)  strain fatigue notch factor
应变疲劳缺口系数
1.
The strain fatigue notch factors kf of seven notched specimens are determined by the strain fatigue formulas when the finite fatigue life Nf
同时,引入应变疲劳缺口系数K_f来定量描述缺口对疲劳性能的影响。
4)  fatigue notch factor
疲劳缺口因数
5)  notch fatigue
缺口疲劳
1.
The experiments on notched specimens of an Aluminium alloy indicat that the notch fatigue life can be increased by a tensile over-pre loading but decreased by a compressive over-pre loading.
预过载拉伸可提高铝合金缺口疲劳寿命,但效果不及喷丸;过载量太大还使寿寿命趋于子下降。
2.
The calculation and measuremental results of K_f and △σ_(RN) (notch fatigue limit) are coincided very well,whose error is less than 10%.
从理论上导出了塑性材料或低缺口敏感材料的有效应力集中系数K_f与理论应力集中系数K_t和硬化指数n之间的定量关系:K_f=K~(2/(2+n))计算了缺口疲劳极限△σ_RN和K_f,计算值和测量结果相符,误差一般小于10%。
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6)  fatigue notch factor
疲劳切口系数
1.
The fatigue notch factor is introduced as the ratio of average stress over the region of a critic distance around critic point to the hot spot stress.
将疲劳切口系数定义为临界距离法得出的平均应力与热点应力之比值。
补充资料：疲劳缺口因数
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性质：没有缺口试样的疲劳强度与有缺口的同样试样的疲劳强度之比。缺口的存在，造成局部应力集中，将有利于该处疲劳微裂纹的发展，将明显降低疲劳强度。所以，使用缺口试样做疲劳试验可以说是一种加速处理，以缩短试验时间，减少试验支出。

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