Analysis of thermal stability and lubrication characteristics of Millettia pinnata oil

RSC Advances ◽  
2016 ◽  
Vol 6 (84) ◽  
pp. 81414-81425 ◽  
Author(s):  
M. H. Mosarof ◽  
M. A. Kalam ◽  
H. H. Masjuki ◽  
A. Arslan ◽  
I. M. Monirul ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Friction And Wear ◽  
Metal Contact ◽  
Millettia Pinnata ◽  
Contact Surfaces ◽  
Lubrication Characteristics

Lubricants are mostly used to reduce the friction and wear between sliding and metal contact surfaces, allowing them to move smoothly over each other.

Synthesis and Lubrication Characteristics of Aryloxycyclophosphazenes Substituted With Imidazolium

2009 ◽  
Vol 131 (3) ◽  
Author(s):  
Jinlong Li ◽  
Feng Zhou ◽  
Dapeng Feng ◽  
Yanqiu Xia ◽  
Weimin Liu
Keyword(s):  
Ionic Liquids ◽  
Tribological Properties ◽  
Friction And Wear ◽  
Ambient Condition ◽  
Wear Volume ◽  
Tribochemical Reaction ◽  
Lubricating Film ◽  
Strong Adsorption ◽  
Contact Surfaces ◽  
Lubrication Characteristics

A series of new aryloxycyclophosphazene derivatives substituted with imidazolium ionic liquids was synthesized. Their tribological properties were investigated on an Optimol SRV IV oscillating friction and wear tester in ambient condition. An electric field was imposed between the ball and disk to monitor the tribochemical reaction by means of “contact resistance.” These ionic liquids substituted cyclophosphazene derivatives present lower friction coefficient and wear volume loss than tetrakis-(3-trifluoromethylphenoxy)-bis(4-fluorophenoxy)cyclotriphosphazene. The polarity of ionic liquids is believed to provide strong adsorption to contact surfaces and can form a boundary lubricating film leading to friction and wear reductions. Introducing the ionic liquids to cyclophosphazene may be a new method to improve the tribological properties of cyclophosphazene derivatives.

A Micro-Tribotester for Evaluating Friction and Wear on Side Contacting Surfaces in Bulk-Microfabricated Devices

2005 ◽  
Author(s):  
Zhanshe Guo ◽  
Yonggang Meng ◽  
Hao Wu ◽  
Caijun Su ◽  
Shizhu Wen
Keyword(s):  
Resonant Frequency ◽  
Friction And Wear ◽  
Fem Analysis ◽  
Elastic Displacement ◽  
Dynamic Friction ◽  
Bulk Silicon ◽  
Friction Coefficients ◽  
Lateral Contact ◽  
Silicon Materials ◽  
Contact Surfaces

A micro-tribotester has been designed and fabricated to evaluate friction and wear on lateral contact surfaces of silicon materials. In the design of the tribotester, FEM analysis was used to find the resonant frequency and elastic displacement of the device under electrostatic excitations. The micro-tribotester was fabricated with a standard bulk silicon process. Static and dynamic friction tests were done on the fabricated device under various DC and AC stimulation conditions. From the measured maximum deflections of the detecting beams in the loading and sliding directions, static and dynamic friction coefficients of contacting sidewalls have been obtained. Characteristics of tribological behaviors in MEMS were discussed.

A Surface Analytical Study of the Effects of Water and Oxygen on Tribological Behavior of DLC Films

2005 ◽  
Author(s):  
O. L. Eryilmaz ◽  
A. Erdemir ◽  
J. A. Johnson ◽  
N. Mehta ◽  
B. Prorok
Keyword(s):  
Surface Chemistry ◽  
Friction And Wear ◽  
Analytical Study ◽  
Tribological Behavior ◽  
Mechanistic Explanation ◽  
Sliding Contact ◽  
Diamond Like Carbon ◽  
Near Surface ◽  
X Ray ◽  
Contact Surfaces

In this study, we explored the effects of water and oxygen molecules on friction and wear of diamond-like carbon (DLC) films. Specifically, using Raman and x-ray photoelectron spectroscopies we attempted to analyze the near surface chemistry and microstructure of sliding contact surfaces and correlated these findings with changes in friction and wear of DLC films. Tribological tests were run in a ball-on-disk machine under 2 to 5 N loads and in dry and moist nitrogen and oxygen environments. Based on the tribological and surface analytical findings, a mechanistic explanation is provided for the high friction and wear of DLC in dry and humid oxygen environments.

scholarly journals Millettia pinnata: a study on the extraction of fibers and reinforced composites

2020 ◽  
Vol 7 (1) ◽  
Author(s):  
P. B. Mohankumara ◽  
Shraddha Prashant Thakare ◽  
Vijaykumar Guna ◽  
G. R. Arpitha
Keyword(s):  
Thermal Stability ◽  
Tensile Strength ◽  
Natural Fiber ◽  
Natural Fibers ◽  
Compositional Analysis ◽  
Morphological Properties ◽  
Reinforced Composites ◽  
Polypropylene Composites ◽  
Wide Range ◽  
Millettia Pinnata

AbstractIn this work, the potential for using Millettia pinnata stalk for extracting cellulosic natural fibers and its subsequent use in reinforced composites was studied. The extracted fibers were characterized for its composition, mechanical, thermal stability and morphological properties. Compositional analysis showed that the fibers possessed 54% cellulose, 12% hemicellulose, 15% lignin and 11% ash. The tensile strength of the fiber was 310 MPa, which is comparable to cotton and linen. The tensile strength of the M. pinnata fiber-reinforced polypropylene composites was 17.96 MPa which was similar to other natural fiber-based composites. M. pinnata fibers appear promising for a wide range of applications including textiles and other typical composites applications.

Strategies for Implementing the Jakobsson-Floberg-Olsson Cavitation Model in EHL Simulations of Translational Seals

2021 ◽  
Author(s):  
Niklas Bauer ◽  
Andris Rambaks ◽  
Corinna Müller ◽  
Hubertus Murrenhoff ◽  
Katharina Schmitz
Keyword(s):  
Friction And Wear ◽  
Wear Behavior ◽  
Metal Contact ◽  
Test Case ◽  
Cavitation Model ◽  
Friction And Wear Behavior ◽  
Theoretical Investigations ◽  
Gap Test

The numerically stable simulation of cavitation effects is mandatory for predicting the friction and wear behavior of translational hydraulic seals. This contribution provides a comparison of two different implementations of the Jakobsson-Floberg-Olsson (JFO) cavitation model, an investigation of their properties and possible options for their stabilization. These methods are tested and compared both within a simple divergent gap test case as well as within an EHL simulation of a rubber metal contact. Based on these comparisons and theoretical investigations, the strengths and weaknesses of the different methods are summarized and discussed with respect to an application in EHL simulations of translational hydraulic seals.

scholarly journals Effect of gasoline–bioethanol blends on the properties and lubrication characteristics of commercial engine oil

RSC Advances ◽  
2017 ◽  
Vol 7 (25) ◽  
pp. 15005-15019 ◽  
Author(s):  
L. S. Khuong ◽  
H. H. Masjuki ◽  
N. W. M. Zulkifli ◽  
E. Niza Mohamad ◽  
M. A. Kalam ◽  
...  
Keyword(s):  
Friction And Wear ◽  
Engine Oil ◽  
Oil Degradation ◽  
Lubrication Characteristics ◽  
Engine Components

The increasing use of bioethanol causes tribological effects on engine components. It is crucial to study the effect of bioethanol on oil degradation and friction and wear behaviors of engine oil, using four-ball wear tester.

scholarly journals The Effect of Bionic Brake Drum Striped Unit Body on Friction and Wear of Brake Pad

2020 ◽  
Vol 213 ◽  
pp. 02012
Author(s):  
Haiyan Hu ◽  
Haiyang Yang ◽  
Jiandong Yang ◽  
Qingnian Wang ◽  
Ti Zhou
Keyword(s):  
Stress Distribution ◽  
Contact Stress ◽  
Friction And Wear ◽  
Normal Pressure ◽  
External Pressure ◽  
Brake Pad ◽  
Distribution Law ◽  
Contact Surfaces ◽  
Brake Drum ◽  
Contact Stress Distribution

In this paper, the contact mechanics is applied to analyse the interaction between the striped unit body on the bionic brake drum and the brake pad. The contact stress distribution law of two objects interaction is obtained. According to the stress distribution law the change of the friction and wear of the striped unit body on the brake pad is derived. Considering the change of the surface feature regardless of other factors, the friction wear of the striped unit body on the brake pad has increased by more than 27%. It is found that small convex striped unit bodies are added on the surface of the bionic brake drum, which makes the contact surface between the brake drum and the brake pad no longer the original plane contact. Therefore, the pressure and direction between the contact surfaces are various. Besides, even if the external pressure does not change, the contact normal pressure between the contact surfaces will be increased which increases the friction wear on the brake pad accordingly.

scholarly journals Effects of Self-Lubricant Coating and Motion on Reduction of Friction and Wear of Mild Steel and Data Analysis from Machine Learning Approach

Materials ◽  
2021 ◽  
Vol 14 (19) ◽  
pp. 5732
Author(s):  
Nayem Hossain ◽  
Mohammad Asaduzzaman Chowdhury ◽  
Abdullah Al Masum ◽  
Md. Sakibul Islam ◽  
Mohammad Shahin ◽  
...  
Keyword(s):  
Machine Learning ◽  
Mild Steel ◽  
Friction And Wear ◽  
X Ray Diffraction ◽  
Low Velocity ◽  
Machine Learning Approach ◽  
Electron Microscopy Analysis ◽  
Coating Characteristics ◽  
Microscopy Analysis ◽  
Lubrication Characteristics

The applications of coated mild steels are gaining significant attention in versatile industrial areas because of their better mechanical properties, anticorrosive behavior, and reproducibility. The life period of this steel reduces significantly under relative motion in the presence of friction, which is associated with the loss of billion-dollar every year in industry. Productivity is hampered, and economic growth is declined. Several pieces of research have been conducted throughout the industries to seeking the processes of frictional reduction. This study is attributed to the tribological behavior of electroplated mild steel under various operating parameters. The efficiency of commercial lubricant and self-lubrication characteristics of coated layer plays a significant role in the reduction of friction. The reciprocating and simultaneous motion in relation to pin as well as disc are considered during experimentation. The lubricating effects in conjunction with motions are responsible for compensating the friction and wear at the desired level. During frictional tests, the sliding velocity and loads are changed differently. The changes in roughness after frictional tests are observed. The coated and rubbing surfaces are characterized using SEM (Scanning Electron Microscopy) analysis. The coating characteristics are analyzed by EDS (Energy Disperse Spectroscopy), FTIR (Fourier-transform Infrared Spectroscopy), and XRD (X-ray diffraction analysis) methods. The lubrication, reciprocating motion, and low velocity result in low friction and wear. The larger the imposed loads, the smaller the frictional force, and the larger the wear rate. The machine learning (ML) concept is incorporated in this study to identify the patterns of datasets spontaneously and generate a prediction model for forecasting the data, which are out of the experimental range. It can be desired that the outcomes of this research will contribute to the improvement in versatile engineering fields, such as automotive, robotics, and complex motion-based mechanisms where multidimensional motion cannot be ignored.

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