对于缺口疲劳试样，则采用半寿命阶段的疲劳参数的预测结果为最小。
As for notched specimen, the fatigue life prediction using fatigue factors of half-life section is the smallest.
采用高能喷丸方法使工业纯钛疲劳试样的表层实现纳米化，并进行了疲劳试验。
Fatigue test was carried out for commercial pure titanium that have nano-crystallized in surface by high-energy shot peening.
疲劳试验发现，疲劳试样断裂位置多发生在焊缝处，并对疲劳断口进行了SEM分析。
Fatigue beaked on weld seam more than other places. Fatigue crack initiation occurred inside materials and fatigue fracture was analyzed by SEM.
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.
用光弹性应力分析，论证了美国卡特皮勒拖拉机公司的齿轮类线接触疲劳试样具有可靠的线接触模拟性；
Photoelastic stress analysis proves reliable line contact simulation of samples for gear style contact fatigue parts designed by Caterpillar Tractor Co. , USA.
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.
疲劳试样多数断于接头的热影响区，造成这一结果的主要原因是热影响区的组织不均匀性和氢含量相对较高。
The fracture occurres at heat affected zone (HAZ) of most fatigue specimens. This is due to the structure inhomogeneity and the higher hydrogen content of materials at HAZ.
研究进一步表明，材料变形的难易程度又与变温循环过程，热疲劳试样拉伸应力的增加和材料屈服强度的降低有关。
Moreover, it is revealed that the deformation resistance in the thermal cycle process is related to the increase of its tensile stress and the decrease of yield strength.
采用微焦点CT对疲劳试样进行了扫描与重建，获得了密度场图像库，并提取了试样内部的三维裂纹形态。结果表明裂纹以体的形式存在。
The specimen was scanned and reconstructed by means of Micro-CT, images of density field were obtained, and the 3D crack morphology was extracted.
MIM钢试样的疲劳强度随着回火温度升高而减低。
Fatigue strength of the MIM specimens declined with increasing tempering temperature.
利用扫描电镜对试样断口进行了观察和分析，并对疲劳寿命提高机制进行了讨论。
The fractographs of specimen are analyzed by SEM, and the mechanism of fatigue life improvement is discussed.
另一方面，为了评估回火温度对疲劳性能的影响，将MIM钢试样于不同温度下进行了回火。
On the other hand, the MIM steel specimens were tempered at various temperatures in order to evaluate effect of tempering temperature on fatigue property.
结果表明，化学镀镍磷合金之后，镀态试样的疲劳寿命明显下降；
The results show that the fatigue life of electroless Ni-P alloy specimen could be dropped.
测定了试样的接触疲劳寿命、硬度、残余应力和残余奥氏体量。
The rolling contact fatigue life, hardness, residual stresses and the amount of retained austenite of the specimens were measured.
提出铝合金光试样非对称循环疲劳极限的估算公式。
The estimating formulae of nonsymmetry cycle fatigue limits for aluminium alloy smooth specimens are presented in this paper.
基于这种分析结果，提出了板材弯曲疲劳等应力试样设计原理以及推荐试样的形状和尺寸。
Based on the analysis, the principle of iso-stress sample design and the shape and dimensions of a recommended iso-stress specimen for bending fatigue of sheet materials have been suggested.
采用CT试样研究了8090铝锂合金疲劳裂纹扩展行为与裂纹闭合效应。
The growth and closure characteristics of fatigue cracks were studied by using CT type specimens in 8090 Aluminium-Lithium alloy.
对试样进行了喷丸处理，进而探讨了球铁材料的强化机制和抗疲劳技术。
Based on the experiments of shot peening to some specimens, the paper makes an approach to strengthening mechanism and fatigue resistance technology for nodular cast iron.
研究表明，多轴疲劳裂纹主要是沿最大剪切平面或垂直于管形试样的轴线方向扩展。
The results showed that most multiaxial fatigue cracks were initiated and propagated along the direction of maximum shear plane or on the direction perpendicular to the tubular specimen's axis.
采用光滑圆棒和中心孔板片试样，对GH901合金室温高低周复合疲劳进行了系统的研究。
The fatigue behaviours of Superalloy GH901 under major combined with minor cycle have been systematically studied at room temperature using smooth specimen and sheet with center hole.
结合桥梁—人行道系统的现场振动测试和螺栓试样断口分析结果，指出既有桥上发生的U型螺栓破断属于疲劳破坏，并提出了改进意见。
Some in-site vibrating test and metal fracture analysis have been done to reveal that the crack of the U-shaped bolts is fatigue failure and some reference for designer is put forward.
在疲劳载荷经过不同循环数后，试样表面进行金相观测的结果指出，对于所用的合金而言，滑移痕迹的变化都表现出两个明显不同的阶段。
Results of metallographic observations on the specimen surface after various stress cycles show that for all the alloys used, the change of slip marks exhibits two distinctly different stages.
结果表明，在同一应力水平下，所用试样的常幅疲劳寿命服从对数正态分布。
It is shown by test results that at a given equivalent stress amplitude the constant amplitude fatigue life follows the lognormal distribution.
无论是淬火或淬回火态的试样其热疲劳裂纹主要沿着碳化物与基体脱开处及晶界裂纹桥接而扩展。
The thermal fatigue crack propagated mainly through the break-age of the interface of carbide and grain boundaries for either quenched or quenched and tempered steel.
使用具有不同最大应变和各种硬度的3d哑铃状试样进行了疲劳试验。
Fatigue tests were performed using the 3d dumbbell specimens with different levels of maximum strain and hardness.
然后测量涂层和基体的硬度，并通过采用旋转弯曲疲劳试验比较涂层试样与未涂层试样的疲劳强度。
Then hardness of coatings and substrate was measured. By means of bend-rotation fatigue tests, fatigue strength of coating and uncoating specimens was compared after hardening and tempering.
本文研究了SCT试样高应变区的疲劳裂纹闭合效应和疲劳裂纹扩展速率。
The fatigue crack closure and fatigue crack growth rate in the high strain region of SCT specimen are studied.
为得到宽范围内的疲劳短裂纹扩展数据，分别对不同试样缺口尺寸和不同载荷条件进行了疲劳试验。
To obtain data of the fatigue short cracks progression in large extent, specimens with different circle indentation gauge were tested and different load condition was applied.
利用接触疲劳磨损理论讨论激光熔覆试样的疲劳磨损寿命问题。
This paper discusses wear life of laser cladding samples with the aid of the theory of contact fatigue wear.
利用接触疲劳磨损理论讨论激光熔覆试样的疲劳磨损寿命问题。
This paper discusses wear life of laser cladding samples with the aid of the theory of contact fatigue wear.
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