搜索结果: 31-45 共查到“Friction”相关记录129条 . 查询时间(0.114 秒)
Comparison of canine retraction using slide friction less ligature modules with conventional modules - an in vivo study
slide friction ligature modules conventional modules
2010/11/3
Comparison of canine retraction using slide friction less ligature modules with conventional modules - an in vivo study.
We study the frictional torque acting on particles rotating in empty space. At zero temperature,vacuum friction transforms mechanical energy into light emission and produces particle heating.However, ...
Casimir Friction Force and Energy Dissipation for Moving Harmonic Oscillators. II
Casimir Friction Force Energy Dissipation Harmonic Oscillators.
2010/10/20
This paper, the second in a series (the first one appearing as arXiv:1001.2489), continues our investigations of a two-oscillator sys-tem in linear relative motion serving as a simplified model of the...
Friction Property and Mechanism of Indoor Optical Fiber Cable and Optimization for Access Network to MDUs
Equipment techniques Fiber materials
2015/6/5
We studied the cable friction and found that it depends on polymer sheath stiffness and lubricants. Optimization should prevent stick-slip motion and reduce the friction by controlling the polymer sti...
Spatially resolved positron annihilation spectroscopy on friction stir weld induced defects
Spatially resolved positron annihilation spectroscopy friction stir weld induced defects
2010/10/12
A friction stir welded (FSW) Al alloy sample was investigated by Doppler broadening spectroscopy (DBS) of the positron annihilation line. The spatially resolved defect distribution showed that the mat...
Stability of low-friction surface sliding of nanocrystals with rectangular symmetry and application to W on NaF(001)
low-friction surface sliding hexagonal lattices rectangular symmetry
2010/4/6
We investigate the stability of low-friction sliding of nanocrystal with rectangular atomic arrangement on rectangular lattices, for which analytical results can be obtained. We find that several inco...
The effect of nonlinear friction forces in quantum mechanics is studied via dissipative Madelung hydrodynamics. A new thermo-quantum diffusion equation is derived, which is solved for the particular c...
Exploitation of Hertz抯 contact pressures in friction drives
contact pressures friction drive Hertz抯 pressures pitting friction force Mohr抯 circles
2014/2/26
The paper is intent on the applications of equations which describe the Hertz抯 surface pressures in friction drives. In the paper the reduced equations are derived, which are useful to the surface pre...
FEM applications to model friction processes in plastic strain conditions
Analysis and modelling CAD/CAM Process Systems Design FEM analysis Tribo-meter
2010/8/17
One of the basic problems in different aspects of movement is the determination of frictional resistance occurring in the analyzed friction node. Plastic working processes are also included in such ge...
激光微造型凸轮副的摩擦磨损（Friction and Wear of Cam with Laser Micro-texture under Lubrication）
凸轮 激光微造型 几何形貌
2010/1/28
采用UMT-2多功能摩擦磨损实验机，模拟内燃机凸轮/滚轮工况条件，考察了多种激光微造型形貌试样表面的摩擦磨损特性。实验结果发现，与未处理光滑表面相比，激光微造型试样表面的耐磨、抗擦伤性显著提高，其中，凹坑造型表面的摩擦因数显著下降，而凹槽表面的摩擦因数相对较大。这说明凹槽形貌会增大表面摩擦，而凹坑形貌具有一定的减摩效果。合理选择凹坑的深度及其面积占有率，并进行微形貌几何参数的优化组合，可达到最佳减...
考虑粘滑摩擦的时变振动系统模态参数辨识（Modal Parameter Identification of Time Varying Vibration Systems Subjected to Stick-slip Friction）
时变系统 模态参数 时变多变量Prony法
2010/1/28
将摩擦因素引入时变振动系统的模态辨识中。采用时变多变量Prony法，对振动系统的多输出响应信号建立时变多变量Prony模型，并利用递推最小二乘法估计模型参数，提取出振动系统的模态特征信息。数值仿真中，对含复合频率信号的频率进行了辨识，辨识值与理论值较好的吻合性验证了该方法的有效性。应用实例中，对平面两杆操作臂中的滑动质量块建立了考虑LuGre摩擦的运动方程，利用时变多变量Prony法辨识出含粘滑摩...
Dry friction of bearings on dynamics and control of an inverted pendulum
Dry friction bearings dynamics inverted pendulum
2010/8/11
Stabilization of the inverted pendulum on a cart is one of the most interesting problems in nonlinear control theory. This mechanical device consists of a free vertical rotating pendulum with a pivot ...
Effect of post-weld aging on the mechanical and microstructural properties of friction stir welded aluminum alloy 7075
Mechanical properties Post weld aging AA 7075
2009/12/2
Purpose: of this paper is to investigate the effect of post-weld artificial aging on the friction stir welding of
Aluminum Alloy 7075 (AA 7075) for a welding condition of 1600 rpm and 100 mm/min usin...
The surface self-organization in process friction and corrosion of composite materials
Composites Corrosion Surface
2009/12/2
Purpose: The analysis of numerous phenomena that concern the possibilities of metal surface self-organization
in friction and corrosion processes.
Design/methodology/approach: The design of structur...
On the friction stir welding of aluminium alloys EN AW 2024-0 and EN AW 5754-H22
Friction stir welding EN AW 2024-0 EN AW 5754-H22 Dissimilar material welding
2009/12/1
Purpose: Purpose of this paper is investigate the friction stir welding capability of the EN AW 2024-0 and EN
AW 5754-H22 Al alloys are studied, because two aluminium alloys are widely used in the in...