查询词典 friction block

It is shown by the friction material behavior tests that the friction material behavior is influenced not only by its mechanical properties, such as hardness, modulus of elasticity, yielding stress and Poisson's ratio etc., but also by its chemical constitutions.

通过对摩擦材料的研究说明：摩擦材料的性能不仅受材料的力学特性，如硬度、弹性模量、屈服应力、泊松比等因素的影响，而且还受其化学组成的影响。

It is probably useful to modify engineering plastics with the addition of polytetrafluoroethylene, which is a crystal polymer with lower friction coefficient, to improve composites friction and wear performance.

添加自身摩擦系数较低的结晶性高分子材料聚四氟乙烯是一种比较有效的改善工程塑料摩擦磨损性能的方法。

UHMWPE has regular molecule chain and lower shear strength, so it improved the tribological property of PA66. When the amount of the transferring layer reached a certain value, severe plastic distortion and adhesion wear occurred, and wear resistance of the blends was related to the mechanical property of the blends. Worn microstructure changes with addition of compatibilizer. Soft UHMWPE produced from friction heating has low shear strength, and it improves the tribological property of PA66 during the friction course.

结果表明：加入MAH-g-HDPE相容剂可以使共混体系的相容性得到改善，提高共混物的机械性能；具有平整分子结构的UHMWPE有利于改善PA66的摩擦磨损性能，当摩擦偶件的转移层达到饱和状态后，共混物的耐磨性与其力学性能相关；共混物在摩擦过程中表现出严重的塑性变形和粘着磨损，但在共混体系的摩擦过程中，对摩擦磨损性能起主要作用的是受热软化的UHMWPE在磨损表面形成低剪切强度的界面层，从而使得PA66的摩擦磨损性能明显改善。

The mean velocity distributions in turbulent boundary layers of smooth surface and two different riblet surfaces are measured with IFA300 constant-temperature anemometer in low-speed wind tunnel to validate the full development of turbulent boundary laye. Friction velocity and wall friction stress of turbulent boundary layer are obtained with the least-squares fitted curve of the sublayer velocity distribution based on Spalding formula, and virtual origin position of riblet surface can be acquired accurately.

在低速风洞中来流速度一定的情况下使用IFA300恒温热线风速仪测量了光滑表面和两种不同尺寸的脊状表面湍流边界层平均速度分布剖面，并验证了试验段湍流发展的充分性；通过应用Spalding壁面公式使用最小二乘法精准拟合了实验测量的边界层内层速度分布曲线，得到了湍流边界层壁面摩擦速度并进一步求得湍流壁面摩擦应力，较准确地计算出脊状表面的虚拟原点位置，并通过与对数律公式拟合结果比较分析，证实了该方法更加准确有效。

Road friction coefficient and roller friction coefficient are necessary.

精确地测量制动实验台滚筒的附着系数和开发相应的检测设备是非常有意义的。

It involves a simple mechanical principle: sliding friction, rolling friction small.

它涉及一个简单的机械原理：滑动摩擦大、滚动摩擦小。

It involves a simple mechanical principle: a large sliding friction, rolling friction small.

它涉及一个简单的机械原理：滑动摩擦大、滚动摩擦小。

Friction.1. Friction causes a rolling ball to stop finally.

摩擦力使得一只滚动的球最终停了下来。

In fact, M0 accounts for the additional external sources of friction, together with the "hydrodynamic" component of rolling friction, which also has a load dependent part.

实际上，M0代表额外的外部摩擦来源，再加上滚动摩擦中的"流体动力"成份，而这一成份中也有一部分与负荷相关。

It has high friction properties, resemble anti-wear properties and brake moment curve compared with Dunlop company and Messier-Bugatti company carbon brake discs materials. It has excellent mechanics performance and axis heat conduct coefficients compared with abroad carbon brake discs materials. The friction properties of RTO Wetness normal brake increased by 23％-29% than Dunlop carbon brake discs materials.

与英国Dunlop公司、法国Messier-Bugatti公司生产的炭刹车盘材料相比，其高摩擦特性及抗磨损性能相当，刹车力矩曲线形态相似，且力学性能、轴向导热系数明显高于国外炭刹车盘材料，RTO刹车湿态刹车时的摩擦特性高出Dunlop炭刹车盘材料23％-29%。

There are two types of gold deposits in this area, namely altered rock type and quartz vein type.

本区金矿床包括两种类型：柴胡栏子金矿床为蚀变岩型金矿；莲花山和红花沟金矿床属石英脉型。

You were home and it was two weeks ago.

你回到了家里。当时是两周前。