查询词典 fatigue strength

Many criteria and approaches are developed since multiaxial fatigue was studied on high-cycle fatigue and low-cycle fatigue.

对于高周疲劳和低周疲劳分别出现了许多方法和准则。

Chronic Fatigue Syndrome is the preferred term covering a wide range of conditions including myalgic encephalomyelitis, myalgic encephalopathy, post-viral fatigue syndrome, and chronic fatigue immune dysfuntion syndrome.

慢性疲劳综合征是首选的任期内，涵盖范围广泛的条件，包括myalgic性脑脊髓炎中， myalgic性脑病，后病毒疲劳综合征，以及慢性疲劳综合征的免疫dysfuntion。

Present multiaxial fatigue life analysis method are discussed, and show that equivalent stress-strain approach based on uniaxial fatigue life analysis method can not predict low-cycle fatigue life under nonproportional cyclic loading.

对现有的多轴疲劳寿命分析方法进行了讨论，论证了以单轴疲劳寿命分析方法为基础的等效应变法不能预测多轴非比例加载下的低周疲劳寿命。

The integrate evaluation by using multiple indicator mentioned above can reflect the change of sports load and athletes' functional status and the degree of the sports fatigue comprehensively and sensitively, can offer quantified scientific basis to diagnose the sports fatigue by the combination of Chinese and western medicine. It is also very important to control training load, judge sports fatigue, prevent overtiredness and development of sports injury to excavate demic sports potential efficaciously, raise contest ability etc, and has become all important part of scientific training.

用上述指标进行综合评定，能较灵敏地反映运动负荷量的变化和运动员的机能状态及运动性疲劳程度，为中西医结合诊断运动性疲劳提供科学依据；同时对控制训练负荷，判断运动疲劳，防止过度疲劳和运动损伤的发生，有效地挖掘人体的运动潜力，提高竞技能力等，均有十分重要的意义，并已成为科学训练的重要环节。

The percutaneous pulsive current stimulation of hepatic region in exercise-induced fatigue rats may improve the activity of antioxidant enzymes in liver, promote free radical-scavenging and hepatic glycogen synthesis, delay the occurrence of exercise-induced fatigue, and promote the recovery from exercise-induced fatigue.

脉冲电流经皮刺激运动疲劳大鼠肝区可提高肝脏抗氧化酶的活性，促进机体自由基的消除及肝糖原的合成，具有延缓运动疲劳发生、促进运动疲劳恢复的作用。

This article analyzes high cycle and low cycle fatigue of unnotched steel samples on the basis of theoretical analysis to generalize elastic and plastic fatigue damage and get different rules of evolutionary process under different fatigue damages. Meanwhile, it studies and discusses the calculation of damage evolution and determination of some material constants.

本文在理论分析的基础上，对无缺口钢试件的高周疲劳和低周疲劳进行分析，总结出来了弹性疲劳损伤和塑性疲劳损伤，并得出不同疲劳损伤时的损伤演化规律，同时对损伤演化的算法以及一些材料常数的确定进行了研究和讨论。

They are FF testing methods, surface treatment technique, evaluation of the properties of surface modification layer, coating induced embrittlement, selection of coating materials, effects of SP and other surface modification on fretting fatigue resistance . A new coating technology combined with shot peening is proved in improving FFR of titanium alloy. The relation between fretting wear and fretting fatigue mechanism of titanium alloy are discussed on the basis of the experimental results. The main contributions are as follows:(1) Shot peening is the most efficient way in improving fretting fatigue resistance of titanium alloys. Working hardening, roughening and compressive residual stress are involved in the shot peened surface.

本文针对上述问题，从影响FF行为的关键环节：FF实验方法、表面处理工艺技术及表层性能评价、镀层引起的钛合金脆化行为、脆化机制及镀层材料的选择、喷丸强化因数和表面涂层对钛合金FF抗力的影响、FF与微动磨损的联系等，深入系统地研究影响钛合金FF抗力的控制因数，探讨FF机理，并通过喷丸形变强化与新型表面镀或渗层合理复合，达到进一步提高钛合金FF抗力的目的。

The object of the present paper was to study the relationship between corrosion fatigue crack growth rate da/dN and stress intensity factor amplitude ΔK of 07MnNiCrMoVDR steel by corrosion fatigue crack growth rate experiment in H2S solution. This steel is the typical material used in chemistry and oil chemistry equipment in our country. Corrosion fatigue safety assessment method of pressure vessels with defects in service could be explored and investigated.

本文研究通过对我国化工和石油化工装置中的典型材料07MnNiCrMoVDR钢在腐蚀介质H2S水溶液中疲劳裂纹扩展速率的研究，寻找其腐蚀疲劳裂纹扩展速率da/dN和应力强度因子幅值ΔK之间的关系，探索研究在役含缺陷压力容器腐蚀疲劳安全评定技术。

The characteristics of fatigue life curve of materials in three stages of fatigue life were analyzed and then a model with three parameters was presented to describe the fatigue life curve of materials in the whole region.

分析了材料疲劳寿命曲线在三个阶段内的变化特性，提出了一个描述材料全寿命区域内疲劳寿命曲线的三参数模型。

In comparison with the traditional approach, this method of drawing fatigue diagrams for constant life by fatigue curve equation of constant life can decrease the amount of fatigue experiments by 60%～70%.

用等寿命曲线方程绘制等寿命图与传统方法相比可减少60％～70％的疲劳试验量。

In the days of sailing vessels the crew were afraid they would be becalmed on the ocean.

在使用帆船的时代，船员们担心他们会因为无风而无法在海洋上航行。

As long as foreign donors pay the PA's salary bill, few expect a new intifada.

只要外国继续为巴权力机构的薪水买单，希望发动新暴动的人便寥寥无几。