Carbon-Fiber Reinforced Paper-Based Friction Material: Study on Friction Stability as a Function of Operating Variables

2008 ◽  
Vol 130 (4) ◽  
Author(s):  
Jie Fei ◽  
He-Jun Li ◽  
Le-Hua Qi ◽  
Ye-Wei Fu ◽  
Xin-Tao Li
Keyword(s):  
Carbon Fiber ◽  
Flow Rate ◽  
Automatic Transmission ◽  
Friction Material ◽  
Operating Conditions ◽  
Fiber Reinforced ◽  
Rotating Speed ◽  
Dynamic Friction Coefficient ◽  
Oil Flow ◽  
Carbon Fiber Reinforced

Carbon-fiber-reinforced paper-based friction material (CFRPF), as a new type of wet friction material for automatic transmission, was prepared by a paper-making process. The frictional response of CFRPF is highly complex under a set of dynamically variable operating conditions. To better understand the effect of operating factors (braking pressure, rotating speed, oil temperature, and oil flow rate) on friction stability of the material, tests were carried out using a single ingredient experiment and the Taguchi method. Experimental results show that the braking stability and the dynamic friction coefficient (μd) decrease as braking pressure, rotating speed, oil temperature, and oil flow rate increase. The influence of braking pressure on μd is largest among the four operating factors. μd declines gradually during the first 3000 repeated braking cycles and changes very little subsequently due to the surface topography change in friction material.

Experimental and numerical investigation on wear behavior of carbon-fiber-reinforced carbon matrix composite used in rotary gas seals

2020 ◽  
pp. 135065012091985
Author(s):  
Fei Lu ◽  
Jian Liu
Keyword(s):  
Carbon Fiber ◽  
Matrix Composite ◽  
Orientation Angle ◽  
Carbon Matrix ◽  
Operating Conditions ◽  
Fiber Reinforced ◽  
Wear Simulation ◽  
Wear Rates ◽  
Carbon Fiber Reinforced ◽  
Gas Seals

This paper presents a numerical method for simulating progressive wear of the carbon-fiber-reinforced carbon matrix composite used in rotary gas seals due to high experimental cost. In this study, the carbon-fiber-reinforced carbon matrix composite wear rates are experimentally measured, and a formula for the carbon-fiber-reinforced carbon matrix composite wear rates and material design parameters (orientation angles and densities) and operating parameters (load and velocities) is fitted as an input to the wear simulation. A finite element incremental wear simulation procedure for the pin-on-disk wear problem is presented by calculating the local nodal wear rate and wear direction and by introducing the Arbitrary Lagrangian Eulerian adaptive meshing method. In the procedure, the relation between the anisotropy of carbon-fiber-reinforced carbon matrix composite and the varied orientation angle is considered. Results show that the calculated wear volume agrees well with the experimental data. And then the numerical methodology is utilized to investigate the effects of time, orientation angle and operating conditions on the disk wear. The developed numerical methodology could be applied to other sliding wear problems in engineering machinery.

Abrasion Performances of Stainless Steel/Carbon Fiber Reinforced Polyetheretherketone (PEEK) Friction Material

2007 ◽  
Vol 329 ◽  
pp. 511-518 ◽  
Author(s):  
Hua Fu ◽  
Bo Liao ◽  
Bao Chen Sun ◽  
Ai Ping Liu ◽  
Fang Juan Qi ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Carbon Fiber ◽  
Friction Material ◽  
Resin Matrix ◽  
Wear Loss ◽  
Fiber Reinforced ◽  
Molding Process ◽  
Stainless Steel Fiber ◽  
Higher Temperature ◽  
Carbon Fiber Reinforced

A semi-metallic stainless steel/carbon fiber reinforced PEEK-based friction material was developed in this paper. The composite was PEEK 19.63wt%, stainless steel fiber 7.57 wt%, carbon fiber 10.97 wt%, cashew 6.51 wt% and fillers 55.33%. The molding process was blending for about 30 seconds at higher speed, pre-heating at the temperature of 80 for 30min, molding at 320 and pressure 35Mpa for 3min/mm, then post-curing at the temperature of 80 for 30min , 150 for 30min270 for 30min320 for 180min. The results of abrasion test showed that the developed material N3 had higher and steady friction coefficient and low abrasion value. The SEM morphology study showed that the wear mechanism was particle abrasion at low temperature but adherence abrasion as well as particle abrasion occurred at higher temperature. The cohesive strength of the composite and the heat-resistant property of resin matrix were the key factors affected wear loss. The abrasion depended on the strength of transformed films and matrix.

Effects of Modified-Phenolic on the Tribological Properties of Carbon Fiber Reinforced Phenolic Friction Materials

2016 ◽  
Vol 852 ◽  
pp. 698-703
Author(s):  
Wen Bin Li ◽  
Jian Feng Huang ◽  
Jie Fei ◽  
Wen Jing Wang ◽  
Li Yun Cao
Keyword(s):  
Carbon Fiber ◽  
Tribological Properties ◽  
Friction Torque ◽  
Fiber Reinforced ◽  
Friction Materials ◽  
Dynamic Friction Coefficient ◽  
Wet Friction ◽  
Torque Curve ◽  
Carbon Fiber Reinforced ◽  
Friction Performance

In order to make clear the effects of modified-phenolic on the tribological properties, three kinds of carbon fiber reinforced phenolic friction materials (cashew-modified phenolic, boron-modified phenolic and chemigum-modified phenolic) were fabricated with the ethyl alcohol as the solvent by vacuum filtration. The tribological properties of samples were studied by the QM1000-II wet friction performance tester. The scanning electron microscope was employed to analyze the micro topography of specimens. Results show that the dynamic friction coefficient and variable coefficient of cashew-modified phenolic friction materials are better than other two materials. The temperature is the most stable during the continuous engagements. The friction torque curve is the smoothest and most symmetrical. Thus, the comprehensive performance of cashew-modified phenolic friction materials is excellent.

Effects of NBR Particle Size on Performance of Carbon Fiber–Reinforced Paper-Based Friction Material

2015 ◽  
Vol 58 (6) ◽  
pp. 1012-1020 ◽  
Author(s):  
Jie Fei ◽  
Wei Luo ◽  
Hejun Li ◽  
Jianfeng Huang ◽  
Haibo Ouyang ◽  
...  
Keyword(s):  
Particle Size ◽  
Carbon Fiber ◽  
Friction Material ◽  
Fiber Reinforced ◽  
Carbon Fiber Reinforced
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