查询词典 threshold friction

In the course of FEM model building, tensile test experiment is taken to work out the real stress-strain curve. Ring compress test is also done in this paper, through which the friction coefficient is worked out and the friction mechanism and relevant friction model for tube stagger spinning is studied. The experiments ensured the veracity and reliability of the FEM modeling.

建模过程中，通过材料拉伸试验测定了旋压材料00Ni12Cr5Mo4TiAlV时效钢的真实应力应变曲线；利用圆环镦粗试验测定了材料在不同润滑状态下的摩擦系数，并对强力旋压的摩擦性质和摩擦模型的选择进行了研究，确保了建模关键参数的准确性和可靠性。

In the paper, the friction coefficient of the friction pairs of Al2O3 matrix ceramic/45# steel during sliding experiments were studied, and the worn trace's micrographs of Al2O3 matrix ceramic were observed and analyzed, and the wear mechanism of Al2O3 matrix ceramic in dry friction and oil Iubrication were analyzed.

摘 要：本文对Al2O3基陶瓷材料/45#钢摩擦副的摩擦系数与45#钢/45#钢的摩擦系数作了对比滑动摩擦试验研究，观测分析了Al2O3基陶瓷材料磨痕形貌，并就干摩擦，油润滑状态下Al2O3基陶瓷材料的磨损机理进行了分析。

At the aspect of the fade and the average wear, the bakelite modified by the chemigum was better than the bakelite modified by the bunas; When mixing the kevlar fiber and steel fiber their"cooperation effect"happened easily, especially, in the proportion of one to four, the friction materials had the better tribology performance; It was demonstrated that Sb2S3 played a role of binding adhesive of friction materials in high temperature, which could reduce the content of the agglomerant, but it was a higher price material, mixing the petroleum powder and CuS in appropriate proportion would replace it in friction

应用造粒技术，采用颗粒包层的方法，改变摩擦材料内部结构，使摩擦材料由配方比例设计到配方与结构综合设计的转变成为可能，将为研制新型摩擦材料探索出一条新的思路。

AlTiN coating has inconspicuous anti-wear effect on carbide.(3) With the introduce of graphite chips bwteen the frictional surface, the effect of graphite chip on the sliding friction and wear behavior of frictional pair was studied. The results show that graphite chips can reduce the coefficient of friction and frictional temperature, and make the coefficient of friction decrease with the decrease of normal load and rise of sliding speed.

在硬质合金微铣刀高速铣削石墨的刀具磨损和破损研究方面，分析了石墨高速铣削过程中的摩擦学条件，揭示了涂层和非涂层硬质合金微铣刀高速铣削石墨的刀具磨损和破损形态及其机理，研究结果表明涂层早期剥落是涂层的早期破损形式，&抛光&磨粒磨损是涂层硬质合金微铣刀在稳定磨损期的主要磨损机理。

The results showed that under the given experimental conditions,the surface layer with richiron and poor copper was formed in the surface worn region of the semimetallic friction material,the depth of organic ingredient pyrolysis caused by friction heat in worn surfaces was atout 0.35mm; the semimetallic friction material containing 15%-20%of Cu had better wear-resistance,and can form a even and continuous transfer film of copper; crack peeling was the importantmechanism of the counterpart.

半金属摩擦材料具有摩擦系数稳定，耐磨性好，对环境污染小和对偶件表面损伤小等优点，但其在摩擦热和界面应力等因素作用下，表层会发生弹性变形，塑性变形，元素扩散，组分转移和摩擦化学反应等现象，因此，利用扫描电子显微镜X射线能量色散谱和差热－热重分析，对铜纤维增强的半金属摩擦材料与灰铸铁滑动摩擦表面层的特性作了分析研究，考察了表面层特性对摩擦损行为的影响。

Under heavy load and high temperature conditions, the nanoparticles are flatted between two friction surfaces and form a sliding system which makes the friction surface more flat to reduce the friction factor and the wear value.

在重载和高温条件下，纳米粒子平铺在摩擦面之间形成滑动摩擦层，以降低摩擦表面的摩擦因数和磨斑直径。

At present, the company mainly produces clutch friction plate motorcycle, engineering machinery brakes, motor friction films, mower, broken sticks machine, automobile air conditioning compressor, electric hoist, etc. special friction material.

目前，公司主要生产摩托车离合器摩擦片，工程机械用刹车片、电机摩擦片，割草机、碎枝机、汽车空调压缩机、电动葫芦机等特种摩擦材料。

The operation of the shaft and the sliding friction between the axle seat into a rolling friction, thus reducing the friction loss of a precision mechanical components, called the rolling bearing.

将运转的轴与轴座之间的滑动摩擦变为滚动摩擦，从而减少摩擦损失的一种精密的机械元件，叫滚动轴承。

The numerical results show that: the stress distribution on contact surface is relative to the relative velocity of sliding block and friction coefficient, and the maximum relative error of stress can be 100.08%. The non-linear Stribeck friction model can better describe the real situation of contact surface, because of the consideration of impact of the relative velocity to the friction.

研究结果表明：随着接触体相对速度的改变，摩擦因数相应变化，接触面上的应力与位移的分布随之改变，应力最大相对误差达100.08%；Stribeck模型考虑了速度对摩擦因数的影响，更能描述接触的真实情况。

The effect of temperature on the friction and wear performances of multi-fibers reinforced automotive brake is investigated using XD-MSM tester. The mechanism of friction and wear is analyzed by observing the surfaces of friction material worn at different temperatures by means of scanning electron microscope.

利用XD-MSM型定速摩擦试验机，考察了摩擦材料的摩擦系数和磨损率随温度变化的情况，并且通过扫描电镜观察了摩擦材料在不同温度下磨损后的表面形貌，分析其摩擦磨损机理。

Methods Clinical data of 3 cases of bile duct injury during laparoscopic cholecystectomy were analyzed retrospectively.

回顾总结3例LC术中胆管损伤的临床资料，分析3例胆管损伤的原因及对策。

These techniques are applied to the gobang.

本文将这些技术用于五子棋中。