查询词典 fatigue

The code adopts to ratio of stress as fatigue control factor is quite different from new theory, And it cant reveal real condition of structures. The result of fatigue calculating seems to unsafely.

该规范采用的以应力比控制结构构造疲劳设计的理论已同最新研究理论相差很大，不能反映结构的真实工作状况，且计算结果有偏于不安全的倾向。

For fatigue prediction of welded structure is faced not only the general problem of unwelded structure, but also the special difficulty resulted from weld arts. So, study of fatigue acts for wagon body is very important.

由于焊接结构的疲劳寿命预测不仅要面对非焊接结构必须面对的一般性困难，而且还要面对焊接工艺本身所导致的特有的困难，因此，研究我国铁路车辆焊接结构的疲劳行为有重要意义。

OBJECTIVE: To explore on the emergence of sports fatigue and investigate the way of eliminating or alleviating fatigue.

目的：探讨运动性疲劳的产生机制和消除或缓解运动性疲劳的方法。

Comparting fatigue tests on TR upsetting and open die forging,this paper finds that the fatigue strength of the TR upsetting crankshaft is 16 — 22 percent higher than that of the open die forging crankshaft.

本文介绍了先进的TR镦锻法制造曲轴毛坯的工作原理。

Excessive fatigue, familiar clinical manifestation of sub-health, produces plentiful "fatigue toxin" which corrades continually all systems and organs, leads to some serious diseases and accelerates Karoshi's occurrence finally.

出现亚健康就是给健康亮了黄灯，过度疲劳是常见亚健康表现，而&疲劳毒素&长时间、多系统的侵蚀将导致各种严重疾病，最后促进&过劳死&的发生。

The fatigue propagation of surface cracks on overlay of hydrogenation reactor is seriously imperiling the safe run of hydrogenation reactor. It is attracted attention of engineering fields that a surface crack on overlay is able to either stop at the interface of overlay and base material or growth to base material under fatigue load.

热壁加氢反应器堆焊层表面裂纹的扩展严重威胁设备的安全运行，在疲劳载荷作用下堆焊层表面裂纹是否能穿过堆焊层与基体的交界面而向基体扩展的问题，受到工程界的高度关注。

Compared with the microstructure with islanded martensite, the microstructures with acicular and netted martensite possess the higher fatigue thresholds and the lower fatigue crack growth rates in both laboratory air and 3. 5% NaCl solution.

无论在空气环境或3.5%NaCl溶液中，与岛状马氏体组织相比，层片状和网状马氏体组织具有较高的疲劳门槛值和较低的裂纹扩展速率。

We approach the problem based on the perception that electric field induced microstructure evolution at the crack tip will lead to fracture and fatigue. It follows that a micrograph of intensified electric field induced domain switching at the crack tip is obtained, a theoretical model of domain switching induced fracture is proposed, and the failure mechanisms of electric fracture, electric fatigue and crack kinking are revealed.

论文从电场驱动的裂尖微结构演化导致电致失效这一基本思路出发，获得了裂尖集中电场诱发铁电畴变的实验图像，提出了电致畴变断裂的理论模型，阐明了铁电陶瓷电致断裂，疲劳裂纹扩展和裂纹偏折的失效机理。

The results show that the fatigue life of the peened joint is 20～30 times as long as the as-welded joints .Therefore,the improvement of the fatigue strength of welded joints by ultrasonic peening is remarkable.

试验结果表明：超声冲击方法对焊接接头疲劳强度的改善效果十分明显，能够提高疲劳寿命20～30倍以上，极具实用价值。

By the way of X-ray stress measurement, the characteristics of residual stress distribution of specimens, which were shot peened and polished, were studied; by the way of three-point bending fatigue tests, the influence of polishing after shot peening on fatigue properties was studied; on this basis, the reason why Shot Peening Standards provide that the depth of metal removal does not exceed 10% of the specified arc height was analysed.

文中指出300M钢喷丸强化工艺中打磨对喷丸效果的影响问题；通过X射线应力测定，研究喷丸及打磨后试样的残余应力分布及变化的特点；通过三点弯曲疲劳试验，研究喷丸后打磨对试样疲劳性能的影响；在此基础上，分析喷丸标准中规定喷丸后打磨去除量不可以超过阿尔门强度值的1/10的原因。

More direct, directer ; most direct, directest

径直的，笔直的

Do you know how to use a chain saw?

你知道如何使用链锯吗？