在疲劳加载中，裂纹扩展始终是稳定的。
During fatigue loading stable crack growth was observed over the en-tire range of crack lengths investigated.
同时也增加了的，其他的SJJ受疲劳加载下连接。
The SJJ also adds, among others connections subject to fatigue loadings.
计算结果表明，该模型能较好地描述混凝土在单轴及多轴单调加载和疲劳加载下的性质。
It is proved by calculation that the model can describe well the performance of concrete under uniaxial and multiaxial monotonic loading and fatigue loading.
在疲劳加载过程中，按一定的疲劳周次在零载荷状态下停机，并采集试件表面上预先制备的白光散斑图。
During the experiment, the fatigue-loading was paused after fixed fatigue cycle and the white-light speckle patterns were acquired without loading.
基于剪切筒模型和常用疲劳加载方式，首先建立了循环荷载作用下钢筋与混凝土界面脱粘应力的计算模型；
Based on the shear-lag model and the usual loading way, the computation model of interfacial debonding stress under tension-tension cyclic loading is established first.
研究结果表明，低周拉扭疲劳加载下，拉与扭应力响应的硬化与软化特性取决于应变加载路径和加载参数。
The results showed that the characteristics of cyclic hardening or softening depend to the strain loading paths and the loading parameters.
通过对弯曲疲劳加载后的剩余模量进行理论分析，验证了理论分析和实验数据之问的一致性，为实际预测复合材料剩余模量提供了依据。
Comparisons made between experimental data and a theoretical fatigue model show good agreement, which can be used to predict the fatigue residual modulus of composites.
累积塑性应变能随着加载频率及应力水平的增加而增加，与疲劳寿命在半对数坐标下呈线性关系。
The cumulative plastic strain energy increases with the increase of the loading frequency and stress level, which is linear with fatigue life on semilog coordinate.
通过对其疲劳性能的实验研究，发现裂纹扩展速率的大小及刚度的下降与加载的最大循环应力密切相关的规律。
The fatigue properties were researched and found that the crack propagation velocity and the decline of rigidity were related to the maximum cycle stress.
本文对45号钢在静载荷下与在循环加载下的本构关系进行了探讨，并给出了低周与高周应变循环的疲劳寿命表达式。
The 45 steel natural relation of dead load with cyclic load and low frequency and high frequency strain cycling fatigue life are studied.
本文提出了借助于电子计算机，用列车编组单对影响线加载来模拟铁路桥梁疲劳应力谱的方法。
With the aid of a computer, a method used to simulate the fatigue stress spectra of railway Bridges by loading the influence lines with the train marshalling list is presented in this paper.
在力学试验研究中，采用声发射技术对已具有疲劳裂纹的核反应堆一回路模拟压力管进行加载爆破断裂的监测。
By using the acoustic emission technique to monitor the fractures on analogous pressure pipes of the primary circuit, which has had cracks and was loaded with pressure, was investigated.
采用一个超声加载频率修正系数对超声疲劳性能试验中载荷频率对疲劳性能的影响进行修正。
A modifying coefficient of load frequency is used to describe the effect of load frequency on fatigue behavior in ultrasonic fatigue testing.
因蠕变加载作用时间缩短和疲劳载荷变化更频繁，导致在较小的应变下结束普弹应变阶段并进入延迟弹性变形的平台应变阶段。
The shortness of creep loading time and the faster frequency of fatigue load change induce general elastic strain stage to end and delayed elastic strain platform stage to begin under shorter strain.
结果表明，本文所提出的多轴疲劳损伤参量既可用于多轴比例循环加载，也可用在非比例加载条件下。
The results show that multiaxial fatigue damage parameter presented in this paper may be used under either proportional or non proportional loading.
分析和试验的结果表明，用改进后的软件控制随机加载的疲劳试验，可节省35%的试验机时。
The results of analysis and test show that testing time could be shortened 35% with the improved software GAUSS for controlling the MTS system during random-loading fatigue test.
通过多轴疲劳试验，研究了在多轴加载条件下45钢的循环特性变化规律。
Multiaxial fatigue tests were conducted on 45 steel specimens at room temperature. Thin-walled tubular specimens were subjected to combined tension and torsion loading in low cycle strain control.
在多轴疲劳寿命预测模型中考虑非比例加载路径对疲劳寿命的影响可以大大提高寿命模型预测的精确度。
The fatigue life prediction models will give better prediction by considering the influence of different loading paths upon the fatigue life.
研究它们在循环加载下的疲劳裂纹萌生行为及其机制。
The fatigue crack initiation behaviour and its mechanism were investigated.
研究了不同腐蚀介质中及加载频率下x 6 0管线钢的腐蚀疲劳裂纹扩展特性。
The characteristics of corrosion fatigue crack propagation of X60 pipe steel at different loading frequencies and in different corrosion media were studied.
通过对ZPL—350变长线齿轮减速器逐级加载试验表明：疲劳折断发生在大齿轮上。
The step-load testing of the ZPL—350 trochoidal-gear reducer shows that the fatigue rupture of the trochoidal gears takes place in the teeth of wheels.
导致加载序列作用的加载历史极大地影响着变幅加载下的疲劳裂纹扩展行为。
Fatigue crack propagation behaviour under variable amplitude loading is significantly influenced by load history induced sequence effects.
依据损伤演变与损伤状态、加载条件间的相关性，建立了相应的疲劳损伤模型。
According to the correlation between accumulative damage and loading levels, the fatigue damage model is established.
依据损伤演变与损伤状态、加载条件间的相关性，建立了相应的疲劳损伤模型。
According to the correlation between accumulative damage and loading level the fatigue damage model is established.
给出了交变加载（疲劳）断裂韧性指标K_（IF）和断裂的疲劳次数（疲劳寿命）N_f的表达式。
The results are analyzed and on equation between fatigue fracture toughness K_(IF) and fatigue life N_f is formulated in this paper.
通过奥贝球铁的单调拉伸加载、接触疲劳和应变疲劳等宏观断裂规律和微观分析，探讨其强韧化机制。
The toughening mechanism of ADI was investigated by microstructure analysis and fracture characteristics of the specimens under tensile test. contact fatigue and stress fatigue.
对LY 12铝合金的拉扭复合加载疲劳性能进行了研究，并用扫描电镜对疲劳试样的断口进行了观察。
Fatigue properties of LY12 aluminum alloy samples under combined tension and torsion were investigated, and the fracture surfaces were observed through scanning electron microscopy.
疲劳损伤随加载周期依次表现为加载区的屈服、加载区外围即滑移区的虫蚀状磨损和片状剥落，以及随后出现大块脱落。
According to the loading cycles, the fatigue damage represented bend in loading area, worm - eaten abrasion or exfoliation around loading area and sequent massive exfoliation.
利用扫描电镜对多轴比例和非比例加载下的薄壁管多轴疲劳试样的断口表面进行扫描观测分析。
The fatigue fracture surfaces of multiaxial fatigue specimens subjected to proportional and non-proportional multiaxial loadings were observed and analyzed by using the scan electron microscope.
本文通过钢筋混凝土芯梁及粘贴钢板补强混凝土复合梁的疲劳试验，研究了它们在疲劳试验过程中载荷和加载线位移及跨中挠度的变化规律。
This paper deals with the load-deflection and load displacement curves of beams basedon the fatigue experiments of plated and unplated RC beams.
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