scholarly journals The Effect of Graphene Coating on Surface Roughness and Friction Properties of Polyester Fabrics

2021 ◽  
Vol 27 (4) ◽  
pp. 470-476
Author(s):  
Gizem MANASOGLU ◽  
Rumeysa CELEN ◽  
Mine AKGUN ◽  
Mehmet KANIK
Keyword(s):  
Surface Roughness ◽  
Friction Coefficient ◽  
Experimental Results ◽  
Kinetic Friction ◽  
Roughness Parameters ◽  
Polyester Fabrics ◽  
Graphene Coating ◽  
Friction Tester ◽  
Coated Fabrics ◽  
Fabric Surface

In this article, the surface roughness and friction coefficient values of graphene coated fabrics were examined. Fabrics were coated with three different graphene concentrations (5 %, 10 % and 20 %) with the knife-over-roll principle. The surface roughness of samples was measured by Accretech Surfcom 130A. Various surface roughness parameters of the coated fabrics were evaluated. Static and kinetic friction coefficients of coated fabrics were measured by Labthink Param MXD-02 friction tester using the standard wool abrasive cloth. It was observed that the coating concentration affected the frictional and roughness properties of fabrics. Experimental results showed that fabric surface roughness and friction coefficient values decreased significantly, especially at 20 % concentration. It was concluded that the coated fabrics produced could be used in applications such as anti-wear clothing.

scholarly journals Alkali Treatment to Maximize Adhesion of Polypyrrole Coatings for Electro-Conductive Textile Materials

2019 ◽  
Vol 1 (1) ◽  
Author(s):  
Zehra Yildiz
Keyword(s):  
Alkali Treatment ◽  
Oxidative Polymerization ◽  
Xrd Analysis ◽  
Shielding Effectiveness ◽  
Polyester Fabrics ◽  
Textile Materials ◽  
Pyrrole Monomer ◽  
Conductive Textile ◽  
Coated Fabrics ◽  
Fabric Surface

In this paper polyester fabrics were pretreated with alkaline solution to improve the ability for the fabric surface to bond with polypyrrole (PPy) coating layer. In situ chemical oxidative polymerization of pyrrole monomer was performed on alkali treated polyester fabrics. Then the fabrics were characterized by FTIR and XRD analysis. The tensile properties of the yarns in both warp and weft directions were measured after alkali treatment and PPy coating processes. The abrasion resistance test was performed on PPy coated fabrics with and without alkali treatment. The surface electrical resistivity of PPy coated fabrics were searched. The electromagnetic shielding effectiveness (EMSE) properties of fabrics in terms of reflection, absorption and transmission behaviors were also investigated. A significant EMSE value increase (about 27%) was obtained with alkali treatment.

Comparative Analysis of the Surface Roughness Parameters due to the Machining Uniformity

2016 ◽  
Vol 367 ◽  
pp. 25-33 ◽  
Author(s):  
Andrzej Golabczak ◽  
Andrzej Konstantynowicz ◽  
Marcin Golabczak
Keyword(s):  
Surface Roughness ◽  
Comparative Analysis ◽  
Magnesium Alloy ◽  
Euclidean Distance ◽  
Experimental Results ◽  
Data Organization ◽  
Roughness Parameters ◽  
Statistical Parameters ◽  
Surface Machining ◽  
3D Profile

In the paper a new method has been proposed for the determining of the very fine machining uniformity over the elaborated surface and could be applied to different machined materials and machining procedures. The proposed methodology is relatively simple and is essentially formulated in the few subsequent steps: taking surface roughness 3D profile accordingly proposed scheme; estimation of the roughness statistical parameters: Rp, Rv, Rt, Ra, Rq, Rskew, Rkurt, and if need be – surface rugosity Ru; calculation of the centroid of the obtained data due to the measurement fields, calculation of the barycentre of the obtained data with the weighting variable chosen for the appropriate evaluation of the surface machining uniformity. As the main Cartesian coordinates of the centroid calculation we propose (Rskew, Rkurt), although other data organization schemes have also been provided as the example solutions. The final evaluation of the surface machining uniformity is based upon the Euclidean distance between the centroid and barycentre of the surface roughness data. The proposed method has been applied to experimental results obtained with the AFM technique used on samples of the polished AZ31 magnesium alloy. The surface machining procedure comprised of four stages performed with using different abrasive media, finally lead to the highest grade of the surface roughness.

scholarly journals Tribological Properties of PVD Ti/C-N Nanocoatnigs

2017 ◽  
Vol 54 (2) ◽  
pp. 64-71
Author(s):  
A. Leitans ◽  
J. Lungevics ◽  
J. Rudzitis ◽  
A. Filipovs
Keyword(s):  
Surface Roughness ◽  
Wear Resistance ◽  
Friction Coefficient ◽  
Wear Rate ◽  
Tribological Properties ◽  
Roughness Parameter ◽  
Surface Wear ◽  
Roughness Parameters ◽  
Coating Deposition ◽  
2D And 3D

Abstract The present paper discusses and analyses tribological properties of various coatings that increase surface wear resistance. Four Ti/C-N nanocoatings with different coating deposition settings are analysed. Tribological and metrological tests on the samples are performed: 2D and 3D parameters of the surface roughness are measured with modern profilometer, and friction coefficient is measured with CSM Instruments equipment. Roughness parameters Ra, Sa, Sz, Str, Sds, Vmp, Vmc and friction coefficient at 6N load are determined during the experiment. The examined samples have many pores, which is the main reason for relatively large values of roughness parameter. A slight wear is identified in all four samples as well; its friction coefficient values range from 0,.21 to 0.29. Wear rate values are not calculated for the investigated coatings, as no expressed tribotracks are detected on the coating surface.

scholarly journals Study on Fabric Surface Roughness and its Influence on Worsted Fabric Abrasion Resistance

2015 ◽  
Vol 10 (4) ◽  
pp. 155892501501000
Author(s):  
Sara Asghari Mooneghi ◽  
S. Mohammad Hosseini Varkiyani ◽  
Siamak Saharkhiz
Keyword(s):  
Surface Roughness ◽  
Statistical Analysis ◽  
Abrasion Resistance ◽  
Three Dimensional ◽  
Two Dimensional ◽  
Roughness Parameters ◽  
3D Surface Roughness ◽  
Strong Linear Correlation ◽  
Fabric Surface ◽  
2D And 3D

Surface roughness is of paramount importance in predicting tactile properties of fabrics. This study aimed at investigating surface roughness and the effect of this property on the abrasion resistance of worsted fabrics. Nine different groups of worsted fabrics were produced. The fabrics had three weave types and three areal densities. A non-contact laser based system was developed to scan the surface of the fabrics. In order to extract the surface roughness profile, a new method of data analysis was presented. Several two dimensional (2D) and three dimensional (3D) roughness parameters were introduced and calculated. Statistical analysis proved that the effect of weave type and weft density was significant on all of the 2D and 3D surface roughness parameters at a confidence range of 95%. However, the 3D parameters provided the surface roughness with just one number in comparison with the 2D ones (warp and weft directions). Therefore, the 3D parameters provided a better indication for the surface roughness which had the effect of both warp and weft directions. Results showed that there was a strong linear correlation between the abrasion resistance and the 3D roughness parameters.

Contact Estimation Using 3D Surface Roughness Parameters

2016 ◽  
Vol 721 ◽  
pp. 373-377
Author(s):  
Armands Leitans ◽  
Oskars Linins ◽  
Irina Boiko
Keyword(s):  
Surface Roughness ◽  
Friction Coefficient ◽  
Surface Model ◽  
Roughness Parameters ◽  
Random Surface ◽  
Surface Roughness Parameters ◽  
3D Surface ◽  
Normal Probability ◽  
3D Surface Roughness ◽  
Normal Probability Distribution

This work is devoted to the elaboration of the new methodology for the wear parts contact estimation using 3D surface roughness parameters defined in the standard ISO 25178-2:2012 for friction and wear rate determination. In our research the random surface model was used, where the height of surface asperities h (x,y) has a normal probability distribution. As a result of research the equations for estimation of the elastic contact area and friction coefficient were derived. The existence of the correlation between friction coefficient and 3D surface roughness parameters was proven as well. The results of this work could have wide practical application, for example in design, for the texture specification on drawings, calculation of load, etc.

scholarly journals Investigation of the Tribological Behaviors of Upholstery Woven Fabrics after Abrasion

2020 ◽  
Vol 20 (2) ◽  
pp. 110-120
Author(s):  
Mine Akgun
Keyword(s):  
Surface Roughness ◽  
Surface Deformation ◽  
Structural Parameters ◽  
Roughness Parameter ◽  
Surface Friction ◽  
Woven Fabrics ◽  
Woven Fabric ◽  
Roughness Parameters ◽  
Friction Coefficients ◽  
Fabric Surface

AbstractFabric surface tribology is an important area of study in upholstery fabrics, which is exposed to high friction and abrasion effects. In the studies on the tribology of upholstery fabrics, it is ensured that criteria such as better performance, less degradation, increased usage time, and user comfort are determined and taken into consideration in the woven fabric design. Surface roughness and friction coefficients are important parameters used in determining abrasion, deformation, and wear behaviors of fabrics. In this study, the surface abrasion behaviors of upholstery fabrics woven with basic and jacquard weave patterns and also different structural parameters were investigated in terms of the changes in surface roughness parameters (amplitude parameters: Ra, Rpm, and Rvm and hybrid parameters: Δa) and the changes in surface friction coefficients. These results were also related to the state of the visual changes in the fabrics. Rpm, Rvm, and Δa being roughness parameters were found to be important in the evaluation of the surface deformation of the fabrics after abrasion besides the Ra parameter. Results showed that the Δa roughness parameter could be suitable for evaluating the deformation of the textile structures to be used, particularly in sensitive applications.

scholarly journals Friction Coefficients for Arborist Ropes Passing Through Cambium Saver Rings

2007 ◽  
Vol 33 (1) ◽  
pp. 31-42
Author(s):  
Brian Kane
Keyword(s):  
Surface Roughness ◽  
Friction Coefficient ◽  
Physical Models ◽  
Kinetic Friction ◽  
Friction Coefficients ◽  
Ring Material ◽  
Tree Care

Friction is important in tree care operations; climbers encounter friction when ascending into, working in, and descending out of a tree. Twelve commonly used climbing ropes were tested on cambium saver rings made of three different materials to determine rope on ring static and kinetic friction coefficients. All ropes were tested before any field use. In addition, two ropes were tested after they had been used in the field for 2 years and were evaluated to determine the effect of rope wear on friction. Friction coefficients varied among ropes and ring materials, and surface roughness of ring material was the best predictor of friction coefficient. Used ropes exhibited higher friction coefficients than new ropes and, in most cases, superseded the influence of surface roughness of cambium saver rings. Simple physical models were developed to illustrate how friction coefficients can affect different aspects of tree climbing. There are important implications of these results for further studies on rope friction as it relates to reducing climber fatigue.

Influence of Shearing Surface Topography on Frictional Properties of ZnS Nanowire-Based Lubrication System across Ductile Surfaces

2012 ◽  
Vol 134 (2) ◽  
Author(s):  
Bassem A. Kheireddin ◽  
Vinay Narayanunni ◽  
Mustafa Akbulut
Keyword(s):  
Surface Roughness ◽  
Friction Coefficient ◽  
Roughness Parameter ◽  
Roughness Parameters ◽  
Integer Multiple ◽  
Frictional Properties ◽  
Surface Roughness Parameters ◽  
Mean Pressure ◽  
Study Offer ◽  
Selection Of

This work deals with the effect of surface roughness parameters on the frictional properties of nanowire-based lubrication systems (NBLS) across Cu surfaces with various topographies. The friction coefficient was discussed in the context of surface roughness parameters including the rms height, inter-island separation and a combined roughness parameter related to the pressure experienced by each nanowire. It was concluded that the rms height of asperity should not be lower than the radius of nanoparticles for effective lubrication. In addition, when the inter-island separation is an integer multiple of the nanowire length, nanowires perform as effective lubricants. Furthermore, the friction coefficient increased when the mean pressure experienced by the nanowires increased. The results obtained in this original study offer some interesting insights into the frictional properties of NBLS as a function of surface roughness parameters. This could lead to a great impact on the selection of nanoparticle-based lubricant aimed at reducing wear and energy losses for various applications.

scholarly journals Friction Characteristics of Machined Metal with Different Surface Morphologies

2015 ◽  
Vol 2015 ◽  
pp. 1-7
Author(s):  
Hsin-Min Lee ◽  
A-Cheng Wang ◽  
Yan-Cherng Lin
Keyword(s):  
Surface Roughness ◽  
Carbon Steel ◽  
Friction Coefficient ◽  
Medium Carbon Steel ◽  
Experimental Results ◽  
Workpiece Surface ◽  
Medium Carbon ◽  
Friction Characteristics ◽  
Abrasive Jet Machining ◽  
Surface Morphologies

This study examined the friction characteristics of SAE1045 medium carbon steel processed by milling machining (MM) and abrasive jet machining (AJM). Friction experiments were conducted with variations in load and friction distance. Experimental results show that micro craters produced by AJM help retain lubricant on workpiece surface and thus decrease friction coefficient. Consequently, for the same friction distance, the amount of wear on AJM test specimens is less than that of MM ones. Moreover, increase in load and surface roughness will also result in great wear on the test specimens.

Influence of surface roughness, friction coefficient, and wrap angle on clinching joint strength and its correlation with belt friction phenomenon

2021 ◽  
pp. 135065012110253
Author(s):  
Santosh Kumar ◽  
Vimal Edachery ◽  
Swamybabu Velpula ◽  
Avinash Govindaraju ◽  
Sounak K. Choudhury ◽  
...  
Keyword(s):  
Surface Roughness ◽  
Friction Coefficient ◽  
Joint Strength ◽  
Joint Interface ◽  
Cross Sectional ◽  
Lap Shear ◽  
Mathematical Correlation ◽  
Mechanical Clinching ◽  
Wrap Angle

Clinching is an economical sheet joining technique that does not require any consumables. Besides, after its usage, the joints can be recycled without much difficulty, making clinching one of the most sustainable and eco-friendly manufacturing processes and a topic of high research potential. In this work, the influence of surface roughness on the load-bearing capacity (strength) of joints made by the mechanical clinching method in cross-tensile and lap-shear configuration is explored. Additionally, a correlating mathematical model is established between the joint strength and its surface parameters, namely, friction coefficient and wrap angle, based on the belt friction phenomenon. This correlation also explains the generally observed higher strength in lap-shear configuration compared to cross-tensile in clinching joints. From the mathematical correlation, through friction by increasing the average surface roughness, it is possible to increase the strength of the joint. The quality of the thus produced joint is analyzed by cross-sectional examination and comparison with simulation results. Experimentally, it is shown that an increment of >50% in the joint strength is achieved in lap-shear configuration by modifying the surface roughness and increasing the friction coefficient at the joint interface. Further, the same surface modification does not significantly affect the strength in cross-tensile configuration.

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