scholarly journals Friction and Wear Pattern of Silica-Reinforced Styrene-Butadiene Rubber (SBR) in Sliding Contact with a Blade Indenter

Lubricants ◽  
2021 ◽  
Vol 9 (11) ◽  
pp. 110
Author(s):  
Budi Setiyana ◽  
Muhammad Khafidh ◽  
Mohammad Tauviqirrahman ◽  
Rifky Ismail ◽  
Jamari ◽  
...  
Keyword(s):  
Coefficient Of Friction ◽  
Friction And Wear ◽  
Sliding Friction ◽  
Styrene Butadiene Rubber ◽  
Butadiene Rubber ◽  
Stick Slip ◽  
Wear Pattern ◽  
Significant Difference ◽  
Styrene Butadiene ◽  
Wet Contact

This study investigated the friction and wear pattern of silica-reinforced Styrene-Butadiene Rubber (SBR) in sliding friction with a steel blade indenter. The experiments were conducted using a pin-on-disc tribometer at various applied loads and examined under dry and wet contact conditions. Analysis was focused on investigating the coefficient of friction and length of wear pattern spacing. Related to coefficient of friction identification, the abrasion theory was applied here. In addition, the stick-slip theory to identify the wear pattern spacing was also applied. Results of the experiments show that the overall coefficient of friction (COF) decreases along with the increasing applied loads. The COF in wet conditions is much lower at the beginning of sliding time than the COF in dry conditions. The wear pattern spacing increases with increasing loads. However, it seems that there is no significant difference in pattern spacing between the dry and wet contact condition. In general, the experimental results agree qualitatively with the analytical results.

The Effect of the Environment on the Friction and Wear of Blended Rubber

1994 ◽  
Vol 22 (1) ◽  
pp. 2-18 ◽  
Author(s):  
Y. Uchiyama
Keyword(s):  
Wear Resistance ◽  
Wear Rate ◽  
Friction And Wear ◽  
Substantial Reduction ◽  
Styrene Butadiene Rubber ◽  
Butadiene Rubber ◽  
Fatigue Wear ◽  
Wear Rates ◽  
Metal Gauze ◽  
Styrene Butadiene

Abstract The friction and wear of rubber are properties that are affected by the environment, especially by the oxygen in the air. Natural rubber (NR) is most sensitive to air, butadiene rubber (BR) is scarcely affected by the presence of air, while styrene butadiene rubber (SBR) is intermediate compared to NR and BR. Both the abrasive and fatigue wear rates of NR and BR blends are known to decrease by increasing the BR content. To reduce the wear rates of NR vulcanizates in the air, SBR was blended with NR. In severe rubbing experiments against abrasive cloths, the wear rate of the NR-SBR blends slightly decreased by increasing the SBR content. The NR-SBR blends showed considerable reduction in wear under fatigue wear conditions against metal gauze. Similar experiments were also conducted for SBR-BR blends. Blending with BR showed a substantial reduction in wear, especially in fatigue wear. When NR-BR, NR-SBR, and SBR-BR blends were rubbed against metal gauze in vacuum, the friction and wear of these three blended rubbers was lower in vacuum than in room air. It is concluded that the wear resistance of the blended rubber is affected by its sensitivity to air as well as by the mechanochemical properties of the blends under fatigue wear conditions.

A molecular dynamics study to predict the friction and wear behavior of carbon nanotube reinforced styrene-butadiene rubber

2019 ◽  
Vol 233 (10) ◽  
pp. 1565-1573 ◽  
Author(s):  
Raj Chawla ◽  
Manish Dhawan ◽  
Sumit Sharma
Keyword(s):  
Molecular Dynamics ◽  
Carbon Nanotube ◽  
Coefficient Of Friction ◽  
Computational Method ◽  
Dynamics Simulation ◽  
Styrene Butadiene Rubber ◽  
Butadiene Rubber ◽  
Normal Loading ◽  
Abrasion Rate ◽  
Styrene Butadiene

A computational method based on molecular dynamics simulation has been used to investigate the tribological behavior of carbon nanotube reinforced styrene-butadiene rubber. A three-layer molecular model in which top and bottom layers with Fe atoms and core with styrene-butadiene rubber matrices have been designed. The effect of sliding velocities from 1 m/s to 11 m/s has been studied at an applied normal loading. The properties predicted are abrasion rate and coefficient of friction. The average values of coefficient of friction and abrasion rate decrease from 0.451 to 0.328 and 21.16 to 16.5%, respectively, under sliding velocities of 1 m/s to 11 m/s. The molecular dynamics results show the decrease in coefficient of friction and abrasion rates with increasing sliding velocity.

Sliding friction and wear behavior of Al–Ni–Co–Si quasicrystalline coatings deposited by the high-velocity oxy-fuel spraying technique

2002 ◽  
Vol 17 (2) ◽  
pp. 492-501 ◽  
Author(s):  
Eric Fleury ◽  
Yu-Chan Kim ◽  
Jae-Soo Kim ◽  
Hyo-Sok Ahn ◽  
Sang-Mok Lee ◽  
...  
Keyword(s):  
Coefficient Of Friction ◽  
High Velocity ◽  
Wear Debris ◽  
Friction And Wear ◽  
Sliding Friction ◽  
Wear Behavior ◽  
Stick Slip ◽  
Friction And Wear Behavior ◽  
Test Conditions ◽  
The Coefficient Of Friction

The sliding friction and wear performance of Al–Ni–Co–Si quasicrystalline coatings deposited by the high-velocity oxy-fuel technique were investigated under dry sliding conditions. This study indicated that changes in the imposed sliding test conditions modified the friction and wear behavior of quasicrystalline coatings. Qualitative analysis of the contact interface and wear debris were performed with the aim of understanding the role of the third body on the friction and wear processes. The dependence of the coefficient of friction on the sliding velocity and counterpart material was explained by the stick-slip behavior. It was also shown that test conditions favorable for the formation of thick intermediate layers and the densification of the coating subsurface led to low wear rates. Large cylindrical particles, formed by agglomeration of small wear debris, were suggested as a beneficial factor for the reduction of the coefficient of friction.

scholarly journals Investigasi Numerik Efek Kekasaran Permukaan (Adhesi) pada Kontak Gesek antara Karet Sbr-25 dengan Rigid Indenter

ROTASI ◽  
2018 ◽  
Vol 20 (2) ◽  
pp. 84
Author(s):  
Budi Setiyana
Keyword(s):  
Carbon Black ◽  
Model Material ◽  
Spherical Indenter ◽  
Styrene Butadiene Rubber ◽  
Butadiene Rubber ◽  
Stick Slip ◽  
Styrene Butadiene

Dalam  berbagai  macam  perlakuan  material  yang  ada,  perlakuan material ketika menerima beban luar, baik beban berupa gaya, tekanan, ataupun regangan akan menunjukkan respon yang berbeda- beda, tergantung pada sifat  material tersebut. Material karet atau karet kompon (elastomer) sering dimodelkan sebagai material hyperelastic. Teori tentang model material hyperelastic telah dikembangkan oleh beberapa peneliti seperti teori Yeoh yang umumnya dipakai untuk karet kompon (elastomer) yang diisi dengan carbon black seperti pada Styrene Butadiene Rubber (SBR). Tulisan ini menyajikan investigasi numerik pada kontak gesek antara sebuah rigid spherical indenter dengan material SBR yang diisi 25% berat carbon black (SBR-25). Penelitian dilakukan berbasis Metoda Elemen Hingga dengan menggunakan software ABAQUS 6.14-5. Kontak gesek ini akan menghasilkan besar koefisien gesek yang secara umum terdiri dari dua komponen yaitu komponen adhesi (akibat kekasaran permukaan) dan komponen hysteresis (akibat deformasi). Kontak gesek antara indenter dengan permukaan material SBR-25 dibuat dengan variasi koefisien gesek adhesi sebesar 0, 0.15, 0.5 dan 1 yang nilainya diberikan sebagai data masukan. Hasil yang didapat berupa hubungan gaya reaksi, koefisien gesek hysterisis dan koefisien gesek total terhadap perpindahan geser indenter. Berdasarkan hasil simulasi ditunjukkan bahwa semakin besar kekasaran permukaan, akan menyebabkan munculnya nilai koefisien gesek total yang besar pula tetapi besarnya fluktuatif. Kejadian ini menunjukkan adanya fonemena kontak stick-slip antara indenter dengan permukaan karet.

Design and development of a new portable test setup to study friction and wear

2019 ◽  
Vol 234 (5) ◽  
pp. 730-742
Author(s):  
Anahita Emami ◽  
Seyedmeysam Khaleghian ◽  
Tyler Bezek ◽  
Saied Taheri
Keyword(s):  
Friction And Wear ◽  
Sliding Friction ◽  
Normal Load ◽  
Substrate Surface ◽  
Wear Test ◽  
Wear Testing ◽  
Styrene Butadiene Rubber ◽  
Butadiene Rubber ◽  
Sample Holder ◽  
Test Setup

In this paper, a novel portable sliding friction and wear test rig is introduced. Unlike other laboratory-based test setups, this setup can be used for both indoor and outdoor experiments. There is also no limitation on the size and type of the substrate surface that can be used for the friction and wear test in contrast to typical test rigs, which have some limitations for the size and type of substrate surface. A small six-wheel ground robot is developed to drag the sample on an arbitrary surface for a desired distance and velocity. A ground robot is an unmanned ground vehicle, capable of driving on the ground without humans on board. The speed of this robot can be measured and controlled precisely. The nominal normal load is adjusted using dead weights placed on the sample holder and the friction force is measured using a load cell. An adjustable sample holder was also designed and built to hold different-size specimens. The results of styrene–butadiene rubber block sliding on an asphalt track are presented to validate the test setup and illustrate the potential of the system for friction and wear testing. In addition, the effect of sliding velocity on the friction and wear is studied, and the correlation between the wear rate and the friction coefficient is investigated. These experimental results can be used to estimate the friction and life span of a tire tread compound on the real asphalt road. Finally, the formation of abrasion pattern observed on the rubber surface sliding on an asphalt track is discussed, which provides an insight into the understanding of dominant wear mechanism of tire tread compound on typical asphalt surfaces.

Measurement of Water Film Thickness Due to Sipe Edges of Studless Tires

2012 ◽  
Vol 40 (2) ◽  
pp. 108-123
Author(s):  
Akihiro Takimi ◽  
Tomoaki Iwai ◽  
Yutaka Shoukaku
Keyword(s):  
Coefficient Of Friction ◽  
Slope Angle ◽  
Vertical Direction ◽  
Water Film ◽  
Styrene Butadiene Rubber ◽  
Butadiene Rubber ◽  
Sliding Speed ◽  
Glass Disk ◽  
The Coefficient Of Friction ◽  
Styrene Butadiene

ABSTRACT Water on an icy surface is wiped by the rubber sipe edges of studless tires. However, it has been proposed that water on an icy surface forms a thin film rather than being removed completely. Nonetheless, there have been relatively few studies on the contact conditions of rubber sipe edges and the formation of a water film due to wiping. In this study, the frictional properties and contact areas of model sipes of studless tires were measured. In addition, the thickness of the water film formed on the tread surface was estimated by optical interferometry. Three types of styrene butadiene rubber with different levels of hardness were used as rubber specimens. The experiment was conducted by varying both the number of rubber edges and the slope angle between the rubber specimens and the vertical direction of a glass disk. The coefficient of friction tended to decrease with increasing sliding speed at all slope angles, and the value of the coefficient of friction was decreased as the slope angle became large. Moreover, the contact area between the rubber edges and a glass disk with a slope angle of 0° tended to increase as the sliding speed increased. The thickness of the water film formed after wiping ranged from 0.98 to 1.70 μm, and it increased as the slope angle increased.

Cure and Mechanical Behavior of Rubber Compounds Containing Ground Vulcanizates: Part III. Tensile and Tear Strength

1999 ◽  
Vol 72 (2) ◽  
pp. 357-360 ◽  
Author(s):  
D. Gibala ◽  
D. Thomas ◽  
G. R. Hamed
Keyword(s):  
Tensile Testing ◽  
Styrene Butadiene Rubber ◽  
Butadiene Rubber ◽  
Composite Matrix ◽  
Stick Slip ◽  
Tear Strength ◽  
Ground Rubber ◽  
Rubber Compounds ◽  
Styrene Butadiene ◽  
Crack Tip Blunting

Abstract A black-filled styrene-butadiene rubber (SBR) vulcanizate was ambiently ground, then used as an additive to the original, uncured compound. Sheets of the resulting composite (matrix/ground rubber particulate) were cured, and tensile and trouser tear strength determined. The composite had reduced tensile strength, but enhanced tear strength relative to the original vulcanizate. The contrasting behavior is attributed to the effects of sulfur migration into the particulate rubber and differences in the responses of a tensile and a tear testpiece to discontinuities. In brief, ground rubber acts as a stress-raising flaw in tensile testing, while promoting crack tip blunting and stick-slip behavior in trouser tearing.

Tribological and Viscoelastic Behaviour of Carbon Black Filled Rubber

2010 ◽  
Author(s):  
Bohdana Marvalova ◽  
Iva Petri´kova´ ◽  
David Cirkl
Keyword(s):  
Carbon Black ◽  
Sliding Friction ◽  
Tensile Tests ◽  
Mechanical Analysis ◽  
Styrene Butadiene Rubber ◽  
Butadiene Rubber ◽  
Tribological Behaviour ◽  
Rate Dependent ◽  
Filled Rubber ◽  
Styrene Butadiene

The paper describes a complex experimental research of tribological and mechanical properties of styrene-butadiene-rubber (SBR) filled with carbon black. Tribological properties of SBR rubber material are investigated experimentally using a home made device of ball-on-disc type. The response of SBR in sliding friction depends on sliding speed and on the loading force. The rate-dependent behaviour of carbon-black filled rubber is investigated in tensile tests with different loading rates and in relaxation tests. The viscosity-induced rate-dependent effects are described. The storage and loss moduli and phase angle δ dependency on different amplitudes and frequencies are determined by strain controlled dynamical mechanical analysis. The temperature dependence of dynamic and tribological behaviour of SBR is also investigated.

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