The Experts below are selected from a list of 128253 Experts worldwide ranked by ideXlab platform
Tang Yumin - One of the best experts on this subject based on the ideXlab platform.
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study on tribological and vibration performance of a new uhmwpe graphite nbr water lubricated bearing Material
Wear, 2015Co-Authors: Yan Zhimin, Zhou Xincong, Qin Hongling, Niu Wanying, Tang YuminAbstract:Abstract The mixture powder of Ultra-high molecular weight polyethylene (UHMWPE) and graphite was blended into nitrile–butadiene Rubber (NBR) to be modified to develop a new kind of compound water lubricated Rubber bearing with cost-effective, low-friction performance. In order to study the tribological and vibration performance of the new Material, a series of experiments were carried out on the test rig SSB-100. Friction coefficient and vibration characteristics under different working conditions: speed, specific pressure and temperature were acquired and analyzed by torque meter and B&K Pulse. The mechanical physical performance of the compound Rubber Material SPB-N has reached the requirements of Chinese ship standard CB/T769-2008. The results showed that a better tribological performance of the new Material met the U.S. military standard (MIL-DTL-17901C (SH)). Stick-slip effect of the new Material was induced with critical speed of 0.27 m/s, which showed excellent low-speed performance. Moreover, its friction coefficient reached a minimum value at the speed of 0.54 m/s. Local specific pressure of the new Material was 0.7 MPa. The new composite Rubber Material was served as a kind of water-lubricated bearing Material with excellent all-round performances.
Ari J. Tuononen - One of the best experts on this subject based on the ideXlab platform.
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Onset of frictional sliding of Rubber–glass contact under dry and lubricated conditions
Scientific Reports, 2016Co-Authors: Ari J. TuononenAbstract:Rubber friction is critical in many applications ranging from automotive tyres to cylinder seals. The process where a static Rubber sample transitions to frictional sliding is particularly poorly understood. The experimental and simulation results in this paper show a completely different detachment process from the static situation to sliding motion under dry and lubricated conditions. The results underline the contribution of the Rubber bulk properties to the static friction force. In fact, simple Amontons’ law is sufficient as a local friction law to produce the correct detachment pattern when the Rubber Material and loading conditions are modelled properly. Simulations show that micro-sliding due to vertical loading can release initial shear stresses and lead to a high static/dynamic friction coefficient ratio, as observed in the measurements.
Takashi Nakamura - One of the best experts on this subject based on the ideXlab platform.
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effect of normal load on friction coefficient for sliding contact between rough Rubber surface and rigid smooth plane
Tribology International, 2015Co-Authors: Satoru Maegawa, Fumihiro Itoigawa, Takashi NakamuraAbstract:Abstract This study focused on the normal load dependence of the friction coefficient for the sliding friction of a Rubber Material with a rough surface. A developed friction tester was used to visualize the real contact regions distributed within the transparent contact interface between poly-dimethyl siloxane (PDMS) and glass surfaces. Based on experimental results, an adhesion friction model was developed to explain the normal load dependence of the friction coefficient. This model provides a simple technique that can roughly but easily estimate the real contact area and shear stress without in situ observation of the contact interface.
Yan Zhimin - One of the best experts on this subject based on the ideXlab platform.
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study on tribological and vibration performance of a new uhmwpe graphite nbr water lubricated bearing Material
Wear, 2015Co-Authors: Yan Zhimin, Zhou Xincong, Qin Hongling, Niu Wanying, Tang YuminAbstract:Abstract The mixture powder of Ultra-high molecular weight polyethylene (UHMWPE) and graphite was blended into nitrile–butadiene Rubber (NBR) to be modified to develop a new kind of compound water lubricated Rubber bearing with cost-effective, low-friction performance. In order to study the tribological and vibration performance of the new Material, a series of experiments were carried out on the test rig SSB-100. Friction coefficient and vibration characteristics under different working conditions: speed, specific pressure and temperature were acquired and analyzed by torque meter and B&K Pulse. The mechanical physical performance of the compound Rubber Material SPB-N has reached the requirements of Chinese ship standard CB/T769-2008. The results showed that a better tribological performance of the new Material met the U.S. military standard (MIL-DTL-17901C (SH)). Stick-slip effect of the new Material was induced with critical speed of 0.27 m/s, which showed excellent low-speed performance. Moreover, its friction coefficient reached a minimum value at the speed of 0.54 m/s. Local specific pressure of the new Material was 0.7 MPa. The new composite Rubber Material was served as a kind of water-lubricated bearing Material with excellent all-round performances.
Roslan Ahmad - One of the best experts on this subject based on the ideXlab platform.
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sheet metal forming with the aid of flexible punch numerical approach and experimental validation
Cirp Journal of Manufacturing Science and Technology, 2010Co-Authors: Maziar Ramezani, Zaidi Mohd Ripin, Roslan AhmadAbstract:Abstract This paper presents experimental and finite element studies of Rubber-pad forming process. Three types of Rubber, i.e. natural Rubber, silicon Rubber and polyurethane Rubber are used as flexible punch. The influence of punch speed and Rubber Material on punch load and specimen thinning is investigated experimentally. Stress and strain distributions in the workpiece, die and flexible punch are investigated numerically during the process using finite element software ABAQUS/Standard. Good correlation is achieved between finite element simulation and experimental results in terms of thickness prediction of formed component.
