surface fatigue

This study was designed to monitor localized muscular fatigue with the power spectrum medium frequency of surface myoelectric signal, and test the muscular fatigue of body bices.

通过表面肌电信号的功率谱中值频率（f＿（med））来监测局部肌肉疲劳，对人体的肱二头肌做了疲劳实验。

A half-analytical expression of stress concentration coefficents due to surface roughness was proposed, and a prediction method of fatigue limits of peened specimens with surface fatigue sources was suggested.

提出了表面粗糙度引起的应力集中系数的半解析表达式以及疲劳源在表面时疲劳极限的预测方法。

The feasibility of improving K 417 fatigue life by surface shot peening and recrystallization was studied.

研究了采用喷丸再结晶方法提高K417合金疲劳寿命的可行性.

Effect of residual stress by surface rolling on fatigue for annealed steel

滚压后残余应力对调质钢疲劳性能的作用

Study on the Surface Treatment Process of H 13 Type Hot Work Steel and Its Subsequent Thermal Fatigue and Erosion Behaviors

热作模具钢（H13型）表面处理及其热疲劳、热熔损性能研究

The main cause of thermal shock fatigue is the co-action of micro-cracks, crack bridge and deflection," crushed particles" and roughness on the crack surface during thermal shock cycling.

热震过程中的微裂纹，裂纹桥接和偏转，热震裂纹表面的碎粒及粗糙性等的共同作用是Al2O3-TiC复合陶瓷热震疲劳产生的主要机制。

Study on Supervision System for Surface Fatigue Crack

表面疲劳裂纹监测系统研制

And the concave-convex deformation of grains surface occurred in the early stage of fatigue in copper.

疲劳初期,纯铜试样表面还出现晶粒的弹性凹凸变形.

Shlyannikov , Z . B . Kuang , F . P . Yang ( 2004 ), Surface fatigue crack growth behavior , Russian journal Power Engineering Problems.

杨凤鹏, 林卓英 ( 2004 ), 表面裂纹疲劳扩展的试验, 北京科技大学学报.

The surface fatigue is induced by cyclic stress.

循环变化的接触应力产生的表面疲劳磨损机理。

Analysis of Fatigue Life of Thick-Wall Cylinder with Inner Surface Crack Subjected to High Pressure

具有内表面裂纹高压厚壁圆管的疲劳寿命分析

Three-dimensional effect of surface fatigue crack propagation

表面疲劳裂纹扩展的三维效应

In the present work discovering cutter mark of machining become surface fatigue crack fountain.

在试验过程中发现,疲劳裂纹源多为机加工留在表面的刀痕、划痕.

Because hot work dies suffer from various physical and chemical actions, such as wear, thermal fatigue, erosion, stress corrosion and surface thermal wielding in service, their service life are not long.

热作模具在使用过程中承受着磨损、热疲劳、冲蚀、应力腐蚀、表面热焊合等物理、化学作用，因而其使用寿命较低。

The Effect of Surface Deformation on Fatigue Strength of Constructional Mid-Carbon Alloy Steel and Strengthening Mechanism

表面变形对中碳合金结构钢疲劳强度的影响及强化机理

With tensile round rob as a typical instance, the three-dimensional geometry effects and its characteristics of surface fatigue crack propagation are discussed and investigated.

以拉伸圆杆为例，阐述表面疲劳裂纹扩展中的三维效应及其特点。