Research on the Mechanical Properties of Pure Stainless Fiber and its Effect on Textile Processing

2011 ◽  
Vol 332-334 ◽  
pp. 824-827
Author(s):  
Yu Chai Sun ◽  
Zhong Hao Cheng ◽  
Yan Mei Zhang
Keyword(s):  
Friction Coefficient ◽  
Breaking Strength ◽  
Static Friction ◽  
Textile Fiber ◽  
Textile Processing ◽  
Temperature Resistance ◽  
Static Friction Coefficient ◽  
Dynamic Friction Coefficient ◽  
High Efficient ◽  
Industrial Textiles

Pure stainless fiber products have many excellent properties such as high temperature resistance, resistance to corrosion, high efficient filter etc.. Pure stainless fabrics are getting wider range of application in the field of industrial textiles. The property differences between stainless fiber and common textile fiber made the textile processing of stainless yarn difficult. Based on the testing of dynamic friction coefficient, static friction coefficient, breaking strength and breaking elongation, this paper analyzes the main performance characteristic of stainless fiber and the reasons that makes textile processing difficult. Countermeasures for fabric manufacturing are suggested accordingly.

Experimental investigation and prediction method of fretting wear in rack-plane spline couplings

2020 ◽  
pp. 135065012093983
Author(s):  
Xiangzhen Xue ◽  
Jipeng Jia ◽  
Qixin Huo ◽  
Junhong Jia
Keyword(s):  
Friction Coefficient ◽  
Wear Mechanism ◽  
Static Friction ◽  
Experimental Results ◽  
Fretting Wear ◽  
Accurate Estimation ◽  
Dynamic Friction ◽  
Static Friction Coefficient ◽  
Dynamic Friction Coefficient ◽  
Involute Spline

To investigate the fretting wear of involute spline couplings in aerospace, rack-plane spline couplings rather than the conventional involute spline couplings in aerospace were used to conduct tribological experiments, and it was assumed that the rack-plane spline couplings exhibit consistent contact stress with the real involute spline couplings in aerospace. The relationships among the static friction coefficient, dynamic friction coefficient, and fretting friction coefficient were established via tribological experiments, as well as the fretting-wear mechanism of the rack-plane spline couplings was examined. A fretting-wear estimation model based on the fretting-wear mechanism was developed. By applying the modified Archard equation and Arbitrary Lagrangian–Eulerian adaptive, mesh smoothing algorithm of Abacus was used. According to our experimental results, the fretting wear of the rack-plane spline couplings consisted primarily of abrasive wear, oxidative wear, and adhesive wear. For both, lubrication and non-lubrication settings, the fretting friction coefficient of 18CrNi4A steel (0.27) fluctuated between 0.12 (dynamic friction coefficient) and 0.35 (static friction coefficient). The fretting-wear results estimated via numerical prediction were consistent with the experimental results. When sm (vibration amplitude) was 20, 35, and 50 µm, the most difference in the fretting wear between the experimental results and numerical estimation was 0.001, 0.0007, and 0.001 mm, respectively. Therefore, the proposed model provides a method for accurate estimation of the fretting-wear. Additionally, the model contributes to the precise design of involute spline couplings in aerospace.

The Simulation Research of Dual Clutch Transmission's Starting Process Based on Dynamic Friction Coefficient

2013 ◽  
Vol 401-403 ◽  
pp. 320-325
Author(s):  
Ming Ming Qiu ◽  
Han Zhao ◽  
Fa Ming Sha
Keyword(s):  
Friction Coefficient ◽  
Vibration Analysis ◽  
Working Condition ◽  
Static Friction ◽  
Dynamic Friction ◽  
Simulation Research ◽  
Static Friction Coefficient ◽  
Dynamic Friction Coefficient ◽  
Friction Plate ◽  
Starting Process

Introduce the dynamic friction coefficient of clutch friction plate. Establish Mathematical model of starting process, carried out vibration analysis for frictional sliding process systematically, validated the analysis using Matlab/simulink software. Meanwhile, compared with the starting process by static friction coefficient. The results show that using dynamic friction coefficient to analyse starting process conforms to the actual working condition.

Mechanical Properties of Structural Chuan-Dou Style Wooden Structure

2014 ◽  
Vol 1008-1009 ◽  
pp. 1213-1217
Author(s):  
Jun Wei Wang ◽  
Guan Feng Qiao ◽  
Qing Fang Niu ◽  
Tie Ying Li
Keyword(s):  
Friction Coefficient ◽  
Seismic Performance ◽  
Mechanical Response ◽  
Static Friction ◽  
Analysis Software ◽  
Element Analysis ◽  
Static Friction Coefficient ◽  
Wooden Structure ◽  
Dynamic Friction Coefficient ◽  
The Finite Element Analysis

In this paper, use the finite element analysis software ABAQUS to firstly analyze the mechanical response to simplified model of Chuan-dou type wooden structure under its own weight, followed by the analysis of the structure under horizontal reciprocating loading, and finally seismic performance analysis of the structure under earthquake. Use the same contact properties between the members, and the differences between dynamic friction coefficient and static friction coefficient are not distinguished. The results show that the wooden structure of ancient houses has good seismic performance, which is mainly achieved by the frame deformation and friction slip.

Measurements of the Static Friction Coefficient Between Tin Surfaces and Comparison to a Theoretical Model

2011 ◽  
Vol 133 (3) ◽  
Author(s):  
Rebecca D. Ibrahim Dickey ◽  
Robert L. Jackson ◽  
George T. Flowers
Keyword(s):  
Theoretical Model ◽  
Friction Coefficient ◽  
Human Error ◽  
Surface Profile ◽  
Static Friction ◽  
Quantitative Agreement ◽  
High Plasticity ◽  
Static Friction Coefficient ◽  
Experimental Apparatus ◽  
Rough Surface Contact

A new experimental apparatus is used to measure the static friction between tin surfaces under various loads. After the data is collected it is then compared to an existing theoretical model. The experiment uses the classical physics technique of increasing the incline of a plane and block until the block slides. The angle at the initiation of sliding is used to find the static friction coefficient. The experiment utilizes an automated apparatus to minimize human error. The finite element based statistical rough surface contact model for static friction under full stick by Li, Etsion, and Talke (2010, “Contact Area and Static Friction of Rough Surfaces with High Plasticity Index,” ASME Journal of Tribology, 132(3), p. 031401) is used to make predictions of the friction coefficient using surface profile data from the experiment. Comparison of the computational and experimental methods shows similar qualitative trends, and even some quantitative agreement. After adjusting the results for the possible effect of the native tin oxide film, the theoretical and experimental results can be brought into reasonable qualitative and quantitative agreement.

scholarly journals Brittle Fracture Theory Describes the Onset of Frictional Motion

2019 ◽  
Vol 10 (1) ◽  
pp. 253-273 ◽  
Author(s):  
Ilya Svetlizky ◽  
Elsa Bayart ◽  
Jay Fineberg
Keyword(s):  
Friction Coefficient ◽  
Brittle Fracture ◽  
Static Friction ◽  
Quantitative Agreement ◽  
Interface Fracture ◽  
Earthquake Dynamics ◽  
Rupture Dynamics ◽  
Static Friction Coefficient ◽  
Fracture Theory ◽  
Macroscopic Motion

Contacting bodies subjected to sufficiently large applied shear will undergo frictional sliding. The onset of this motion is mediated by dynamically propagating fronts, akin to earthquakes, that rupture the discrete contacts that form the interface separating the bodies. Macroscopic motion commences only after these ruptures have traversed the entire interface. Comparison of measured rupture dynamics with the detailed predictions of fracture mechanics reveals that the propagation dynamics, dissipative properties, radiation, and arrest of these “laboratory earthquakes” are in excellent quantitative agreement with the predictions of the theory of brittle fracture. Thus, interface fracture replaces the idea of a characteristic static friction coefficient as a description of the onset of friction. This fracture-based description of friction additionally provides a fundamental description of earthquake dynamics and arrest.

scholarly journals A Novel Process for Manufacturing High-Friction Rings with a Closely Defined Coefficient of Static Friction (Relative Standard Deviation 3.5%) for Application in Ship Engine Components

Materials ◽  
2022 ◽  
Vol 15 (2) ◽  
pp. 448
Author(s):  
Wojciech S. Gora ◽  
Jesper V. Carstensen ◽  
Krystian L. Wlodarczyk ◽  
Mads B. Laursen ◽  
Erica B. Hansen ◽  
...  
Keyword(s):  
Standard Deviation ◽  
Friction Coefficient ◽  
Relative Standard Deviation ◽  
Static Friction ◽  
Laser Surface ◽  
Laser Surface Texturing ◽  
Textured Surface ◽  
Fibre Lasers ◽  
Static Friction Coefficient ◽  
Relative Standard

In recent years, there has been an increased uptake for surface functionalization through the means of laser surface processing. The constant evolution of low-cost, easily automatable, and highly repeatable nanosecond fibre lasers has significantly aided this. In this paper, we present a laser surface-texturing technique to manufacture a surface with a tailored high static friction coefficient for application within driveshafts of large marine engines. The requirement in this application is not only a high friction coefficient, but a friction coefficient kept within a narrow range. This is obtained by using nanosecond-pulsed fibre lasers to generate a hexagonal pattern of craters on the surface. To provide a suitable friction coefficient, after laser processing the surface was hardened using a chromium-based hardening process, so that the textured surface would embed into its counterpart when the normal force was applied in the engine application. Using the combination of the laser texturing and surface hardening, it is possible to tailor the surface properties to achieve a static friction coefficient of ≥0.7 with ~3–4% relative standard deviation. The laser-textured and hardened parts were installed in driveshafts for ship testing. After successfully performing in 1500 h of operation, it is planned to adopt the solution into production.

scholarly journals Active Sensing of Static Friction Coefficient ^|^mu; for Controlling Grasping Force

1994 ◽  
Vol 30 (10) ◽  
pp. 1188-1194 ◽  
Author(s):  
Youji YAMADA ◽  
Kenji SANDA ◽  
Kazuhide FUJITA ◽  
Nuio TSUCHIDA ◽  
Kouji IMAI
Keyword(s):  
Friction Coefficient ◽  
Static Friction ◽  
Active Sensing ◽  
Static Friction Coefficient ◽  
Grasping Force
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