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1)  life dispersivity
寿命分散性
1.
Be aimed at the fatigue life dispersivity of bolted fastenings, the distribution of bolt hole clearance is derived by measuring the sizes of typical bolts and holes in wing spars of a certain aircraft, and the distribution interval of the shearing stiffness of the new specimen is obtained by reliability analysis method.
针对螺栓连接件疲劳寿命分散性问题 ,对某型飞机机翼主梁上的一种典型螺栓和连接孔进行测量 ,获得栓孔的配合间隙分布数据。
2)  life diffuse factor
寿命分散系数
1.
The safe life and the life diffuse factor in grouping component fatigue test are studied with the probability statistic methodology.
用概率统计方法研究了构件在成组法疲劳试验中的安全寿命和寿命分散系数 ,用单侧容限系数法计算了 1Cr18Ni9Ti材料及焊接接头的寿命分散系数 ,并对计算结果进行了讨论。
3)  Discrete life distribution class
离散寿命分布类
4)  life reliability analysis
寿命可靠性分析
5)  life distribution
寿命分布
1.
Class of life distribution {IFRA t 0}and property;
{IFRAt_0}寿命分布类及其性质
2.
Research on Very High Fatigue Life Distribution and High Reliability of Structural Components;
金属材料超高周疲劳寿命分布和元件高可靠性研究
3.
Very high cycle fatigue(VHCF)test of 66 specimens of aluminum alloy LC4CS was done by piezo-electric fatigue testing machine,and the fatigue life data showed that the fatigue life distribution of the alloy under VHCF has a characteristic of duplex peak,which is related to the locations of fatigue crack initiation.
寿命分布的双峰特征使得传统的升降法不能用于确定材料的超高周疲劳的条件疲劳极限,超高周疲劳寿命的分散性远大于低周和高周疲劳寿命的分散性。
6)  life analysis
寿命分析
1.
Some typical techniques for the service life analysis adopted overseas are introduced and discussed.
本文分析航天系统对纤维缠绕/金属内衬压力容器的寿命要求,介绍近几年国外航天技术领域对纤维缠绕/金属内衬压力容器普遍采用的寿命分析技术,同时对各种分析技术在使用时应关注的问题进行讨论,并对不同技术之间的差异进行比较。
2.
The fatigue life analysis methods based on virtual simulation were researched.
针对过山车轮架结构疲劳问题的特点和传统疲劳分析方法的不足,研究了基于虚拟仿真的结构疲劳寿命分析方法;采用多种虚拟仿真手段,对过山车进行了多体动力学分析,对轮架结构进行了有限元分析及动态响应分析,对比了多轴疲劳理论的各种损伤模型的特点和适用范围,分别依据最大剪应变准则和Brown-Miller组合应变准则对轮架结构进行了寿命分析,给出了疲劳寿命,并找出了轮架结构的薄弱部位。
补充资料:长寿命天然放射性核素
分子式:
CAS号:

性质:指半衰期和地球年龄(46亿年)相当或更长的、在自然界存在的放射性核素。主要是40K,235U,238U,232Th,87Rb,50V,113Cd,115In,123Te,138La,144Nd,147Sn,148Sm,152Gd,156Dy,176Lu,74Hf,187Re,186Os,190Pt。

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