Underfill technology effectively enhances the flip-chip cycle fatigue life and reliability of packaging process.
基 板上的倒装芯片一般采用底部填充技术以提高其封装的可靠性。
The results show that low cycle fatigue life is reduced and cyclic stress is raised by torsional prestrain raising.
结果表明，扭转预应变降低低周疲劳寿命，循环应力随扭转预应变的增大而增大。
A method is outlined for making low cycle fatigue life prediction for engineering components subject to multiaxial loading.
介绍了一种预测受多轴交变载荷工程构件的低周疲劳寿命的方法。
This device is possessed of the function with 16-channel highly accurate data collection and 100 million-cycle fatigue life count.
该装置具有16通道的高精度信号采集、分析功能和计数容量为100万次的疲劳耐久性及寿命测试功能。
The individual cycle-strain hysteresis loops were recorded, and the cycling response and high temperature low cycle fatigue life were obtained.
记录了各自的循环应力—应变滞后环，得出了试样的循环响应特征和各试样的高温低周疲劳寿命。
The paper also presents the low cycle fatigue life and creep life's quantificational method of steam turbine's main stop valve and control valve, and applied examples.
提出了汽轮机主汽阀和调节阀阀壳低周疲劳寿命和蠕变寿命的定量设计方法，并给出了应用实例。
Based on experimental data and finite element analysis results, a low-cycle fatigue life model is proposed for the powder metallurgy superalloys under multiaxial stress states.
在详细分析试验和有限元计算结果的基础上，提出了复杂应力状态下的低周疲劳寿命模型。
In addition, the FORTRAN calculation program of this method is compiled in this paper, by which the low cycle fatigue life of bellows expansion joints can be calculated accurately.
本文同时编写了该方法的Fortran计算程序，利用该程序可以比较准确地计算出膨胀节的低循环疲劳寿命。
This paper presents a modification to the FMDF model for predicting high-temperature low-cycle fatigue life, which improves accuracy of the model and facilitates the application of it.
本文对预测高温低周疲劳寿命的FMDF公式作了改进，结果明显提高了精度，使其方便实用。
The relationship between low-cycle fatigue resistance and regular mechanical properties was also discussed. The chief factors affecting the low-cycle fatigue life were pointed out too.
讨论了低周疲劳抗力与常规机械性能之间的关系，指出了材料本身对低周疲劳行为的主要影响因素；
The probability fatigue life - span of pressure vessel under the action of different cycle load is closely related to the cycle load with high stress.
承受不同循环载荷共同作用的压力容器，其概率疲劳寿命和在高应力水平上的循环载荷有着密切的关系。
Solder joint fatigue life is generally ascertained through accelerated temperature cycle test on electrical subassembly.
焊点疲劳寿命通常是通过电子组件进行温度循环加速试验来确定。
The point of intersection of elastic line and plastic line moves toward the low cycle life with the hardness of the spring steel raised after tempering from the strain fatigue curve.
在应变疲劳曲线上，弹性线和塑性线的交点随弹簧钢回火后硬度的升高而向低循环寿命移动；
High temperature low cycle fatigue (HLF) life prediction models have great significance for design of high temperature structure under cycLic loading.
高温低周疲劳(HLF)寿命预测方法对于承受变幅载荷的高温构件的设计具有重要意义。
The results show that the crack growth rate under high-low cycle complex fatigue load is greater than that under low cycle fatigue load, and so the fatigue life is obviously reduced.
结果表明：与纯低周载荷作用相比，高低周复合载荷下球墨铸铁的裂纹扩展速率明显加快，极大地降低材料的疲劳寿命。
The factor of life scatter is used for depicting the dispersibility of fatigue strength in low cycle fatigue, but in high cycle fatigue is the fatigue strength reduction factor.
低周疲劳常采用寿命分散系数描述结构疲劳强度的固有分散性，而高周疲劳采用疲劳强度减缩系数来描述。
To model the random cyclic strain life relations during low cycle fatigue, probability based cyclic strain life curves are suggested.
引入了概率循环应变—寿命曲线描述低周疲劳循环应变—寿命试验数据的分散性。
But for the specimens of high cycle fatigue damaged, the annealing can not increase the total life.
但对高周次疲劳损伤，进行修复退火不能愈合裂纹和延长寿命。
The fretting fatigue life under complex loads monotonously decreases with the increase of the high cycle load while the low cycle loads keep constant.
复合载荷下，低周幅值不变，增加高周载荷的幅值，微动疲劳寿命随幅值比的增加而降低。
In identifying parameters of the models, isothermal fatigue test results were applied A method using isothermal cycle data for predcting thermomechanical fatigue life bine was developed.
在确定模型的一些参数时，采用等温力学试验和疲劳试验的数据，把等温疲劳研究成果推广到变温疲劳分析领域。
Mechanical tests were conducted to determine cycle life, fatigue life, vibration resistance, temperature limits, and pressure limits.
力学试验，以确定循环寿命、疲劳寿命、振动性、温度限制和压力的限制。
Experimental results emphasize the influence of high-cycle loads to the fatigue life.
同时通过高低周复合试验，证明了高频载荷对疲劳寿命的影响。
In the low cycle plastic fatigue period, the fatigue progress life Nfcan al - so be increased by 1 time.
在低周塑性疲劳阶段构件的疲劳开裂寿命仍可提高1倍左右。
Based on the orthogonal test design, this paper studied the effect of low cycle stress, high-low cycle stress ratio , high cycle number and high cycle frequency on complex fatigue life.
在高低周复合疲劳研究中采用了正交试验设计的方法，并以此为基础综合研究了低周应力、高低周应力比、高周循环次数和高周循环频率对复合疲劳寿命的影响及其机理。
Try the cardiovascular stent of computational analysis before implantation into the human body at the same time , the fatigue life under the load function of specific cycle ;
由于该模拟分析中可以了解到血管支架在植入人体后，及可能产生的破坏位置点；
Try the cardiovascular stent of computational analysis before implantation into the human body at the same time , the fatigue life under the load function of specific cycle ;
由于该模拟分析中可以了解到血管支架在植入人体后，及可能产生的破坏位置点；
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