疲劳极限；耐久限度
- Strengthening and damaging effect of low-amplitude load below fatigue limit
疲劳极限以下小载荷的强化和损伤试验 - Study of Fatigue Limit of Asphalt Mixture for Perpetual Pavement
长寿命路面沥青混合料疲劳极限研究 - Compared with normal rods, the carbon fibre coiled rod behaves much more advantages, such as lighter weight, better elasticity, resisting corrosion, higher fatigue limit, etc.
碳纤维连续抽油杆与普通抽油杆相比具有质量轻、弹性好、抗腐蚀、耐疲劳等优点。 - The provisions of this article shall not be applied to the fatigue limit state for which one design truck is used, regardless of the number of design lanes.
这条规定不得用于只使用一辆设计卡车的疲劳极限状态，不管设计车道数是多少。 - The study on fatigue limit of industrial structural steel with fracture mechanics
工业结构钢疲劳极限的断裂力学研究 - Abstract: The relationship between fatigue limit and prior austenite grain size has been studied by means of rotating bending fatigue tests for microalloyed case carburizing steels.
摘要：利用旋转弯曲疲劳试验方法，研究微合金化渗碳钢的晶粒尺寸与其疲劳性能之间的关系。 - On the basis of fatigue test under high-low two stresses loading, the paper testifies that the equivalent damage lines do not parallel each other and tend to converge slightly over the fatigue limit.
本文根据高低二级应力作用下的疲劳寿命试验，验证了等损伤线互不平行且向下汇聚。 - Effect of asphalt content on fatigue limit for asphalt mixture
沥青含量对混合料疲劳极限特性的影响 - Infrared Thermography for Testing Fatigue Limit of Material Based on Energy Theory
基于能量理论的材料疲劳红外热像测试技术 - Don't press the handsaw excessively or twist the saw blade. Saw it gently while the work-piece is breaking. Compressive residual stress are the main factor in the increase of torsion fatigue limit.
使用手锯时，不可用力重压或扭转锯条，工件将断时，应轻轻锯割。喷丸后扭转疲劳极限提高的主要原因是残余压应力的作用。 - Reliability of Fatigue Limit State of Concrete on Railway Bridges
铁路混凝土桥混凝土疲劳承载能力可靠度 - Results show that the smaller the grain size is, the higher the fatigue limit is.
结果表明，晶粒尺寸越小，渗碳钢的疲劳极限越高。 - Some invalid fracture specimens of Ti alloy in conditioned fatigue limit test are analyzed.
对钛合金条件疲劳极限测定中的无效断裂试样进行了分析。 - Based on stress concentration coefficient, fatigue notch coefficient, fatigue limit and range of allowed stress are obtained.
在K研究工作的基础上，求得相应的疲劳缺口系数Kf，进而推定高强螺栓的疲劳极限应力幅及其允许应力幅。 - The main reason is the effect of weld toe and weld crack on the fatigue limit.
疲劳断口分析认为，焊缝的焊趾和裂纹是影响高强钢疲劳强度的主要原因。 - On the base of experimental data, a new fatigue limit measuring method of steel bar in concrete based on remained strength has been presented;
在分析了疲劳损伤后未锈钢筋静强度试验数据的基础上提出了基于剩余强度的混凝土用钢筋疲劳极限的测定方法； - Torque prestrain may induce damage or cracks which decrease the reverse torsion fatigue limit of shot peened specimen.
在喷丸前或后进行预应变均使疲劳极限下降。这和预应变时造成的损伤或在夹杂周围造成裂纹有关，它使疲劳寿命降低。 - Compressive residual stress are the main factor in the increase of torsion fatigue limit.
喷丸后扭转疲劳极限提高的主要原因是残余压应力的作用。 - As a result of filtration, the fatigue limit of as forged condition alloy is enhanced, the feature of curve S-N is changed, crack occurrence and velocities of crack develop are slowed down in the initial stage.
过滤提高了变形态合金的疲劳极限，改变了S-N曲线的形状，减缓了裂纹萌生和初期裂纹的扩展速率。 - This paper not only introduces the rock failure process under creep trail and fatigue trail. but compares them with the rock failure process under uniaxial compress and gives the study result about rock creep limit and fatigue limit.
介绍了蠕变试验及疲劳试验与岩石破坏过程和普通的单轴压缩破坏过程之间的相关性以及岩石的蠕变极限和疲劳极限的研究结果。 - Fatigue damage exhibits some fuzzy character when the fatigue stress in load spectrum is lower slightly than fatigue limit.
在载荷谱中，当疲劳应力稍低于疲劳极限时，对构件是否造成损伤呈现出某种模糊过渡状态。 - Among mechanical properties the fatigue limit in rotational beam tests has been determined.
在机械特性中，利用旋转梁试验，确定了疲劳强度。 - The reverse torsion fatigue limit after shot peening and prestrain is higher 20-30% than that of ground one.
对扭转试样进行喷丸和预应变，经强化后试样的对称扭转疲劳极限比磨削态提高20～30%。 - The fatigue limit of condenser copper tube was reduced by working condition which aggravated the spread of crack.
冷凝器铜管的工作环境使疲劳极限大为降低，加剧了疲劳裂纹的扩展。 - Therefore, there is no so-called fatigue limit in conventional criterion; instead there is only fatigue strength.
由此可见，这些高速铁路材料并没有传统规范中所谓的疲劳极限，而只有疲劳强度。 - The results show that the fatigue limit of the commercial pure titanium after surface nanocrystallization increased by34%.
结果表明，但高能喷丸表面纳米化使工业纯钛的旋转弯曲疲劳极限提高了34%。 - The induction quenching realizes imitated stress strengthening, raises fatigue limit and service performance of the torque rod.
感应淬火实现了仿应力强化，提高了扭杆的疲劳极限和使用性能。 - And stress concentration is not more than fatigue limit of material.
应力集中部位没有超过材料的疲劳极限。 - The higher fatigue limit C2 is largely due to its higher surface hardness and a deeper carburized case depth.
研究表明，C2的高疲劳极限主要是由于其渗碳后表面硬度高、渗层深，此外由于C2钢渗碳热处理变形小，疲劳试样加工后渗碳层厚度均匀。