The Experts below are selected from a list of 11067 Experts worldwide ranked by ideXlab platform

Cairang Shijia - One of the best experts on this subject based on the ideXlab platform.

  • the effect of al2o3 fiber additive on Braking Performance of copper based brake pads utilized in high speed railway train
    Tribology International, 2019
    Co-Authors: Peng Zhang, Lin Zhang, Jingwu Cao, Cairang Shijia
    Abstract:

    Abstract Al2O3 fiber was introduced into copper-based brake pads in order to improve the Braking Performance under high speed and heavy load. Two fabricated samples containing Al2O3 fiber and no fiber additive were tested on a reduced-scale dynamometer using a special designed Braking testing procedure. The results indicated Al2O3 fiber additive mainly contributes to promote the increase of friction coefficient at relative low Braking speeds and pressures and helps to stabilize the friction coefficient at high Braking speed and heavy load. The addition of Al2O3 fiber can also greatly reduce the wear loss of brake pads. Moreover, the sample with Al2O3 fiber exhibits the lower maximum temperature during Braking. Further, the relationship between Braking properties and tribo-film is clearly revealed.

Xiaoming Huang - One of the best experts on this subject based on the ideXlab platform.

F. R. Wilson - One of the best experts on this subject based on the ideXlab platform.

  • Analysis of the Braking Performance of a tractor-trailer unit
    Canadian Journal of Civil Engineering, 1995
    Co-Authors: S. Gangopadhyay, F. R. Wilson
    Abstract:

    An analysis of the Braking Performance of a tractor-trailer unit is presented in this paper. The analysis revealed that there existed a wide variation in the ratio of Braking force to vertical load values on each axle of the tractor-trailer. Braking efficiency was higher for the loaded condition than for an empty tractor-trailer. At all initial speeds, the trailer axles attained the maximum ratio of Braking force to vertical load and were the first to lock up. Key words: highway, safety, heavy vehicles, Braking Performance, tractor-trailers.

Saied Taheri - One of the best experts on this subject based on the ideXlab platform.

  • A New Design Tool for Tire Braking Performance Evaluations
    Journal of Dynamic Systems Measurement and Control, 2015
    Co-Authors: Srikanth Sivaramakrishnan, Yaswanth Siramdasu, Saied Taheri
    Abstract:

    The objective of this study is to understand the influence of high frequency tire vibrations induced due to road disturbances and brake torque cycling due to anti-lock Braking system (ABS) on Braking Performance. Under these conditions, transient dynamics of the tire play a crucial role in the generation of Braking force. To implement this, a dynamic tire model was developed using a rigid ring tire and a tandem elliptical cam design for the enveloping model. This tire model is validated using experimental data obtained from high-speed cleat tests on a fixed axle. The validated tire model is then integrated with a quarter vehicle and a commercial grade rule-based ABS model to evaluate Braking Performance with and without a road cleat, which can provide a high frequency disturbance. Simulation results show that the presence of a 1 cm cleat causes large variations in wheel slip, consequently increasing the Braking distance. The developed tool will help both tire and vehicle manufactures for quick and early evaluation of Braking Performance without computationally intensive finite element analysis (FEA) tools.

  • A New Design Tool for Tire Braking Performance Evaluations
    Volume 7: 2nd Biennial International Conference on Dynamics for Design; 26th International Conference on Design Theory and Methodology, 2014
    Co-Authors: Srikanth Sivaramakrishnan, Yaswanth Siramdasu, Saied Taheri
    Abstract:

    The objective of this study is to understand the influence of high frequency tire vibrations induced due to road disturbances and brake torque cycling due to ABS on Braking Performance. Under these conditions, transient dynamics of the tire play a crucial role in the generation of Braking force. To implement this, a dynamic tire model was developed using a rigid ring tire and a tandem elliptical cam design for the enveloping model. This tire model is validated using experimental data obtained from high speed cleat tests on a fixed axle. The validated tire model is then integrated with a quarter vehicle and a commercial grade rule-based ABS model to evaluate Braking Performance with and without a road cleat, which can provide a high frequency disturbance. Simulation results show that the presence of a 1 cm cleat cause large variations in wheel slip, consequently increasing the Braking distance. The developed tool will help both tire and vehicle manufactures for quick and early evaluation of Braking Performance without computationally intensive FEA tools.Copyright © 2014 by ASME

Zhang Jian-wu - One of the best experts on this subject based on the ideXlab platform.

  • Modeling and Simulation of Braking Performance of QREV Electric Car
    Computer Simulation, 2005
    Co-Authors: Zhang Jian-wu
    Abstract:

    Using the knowledge of multi-body system dynamics, in the multi-body system dynamics simulation software ADAMS ,a virtual prototype of QREV electric car is developed and numerical analysis is carried out for Braking Performance of the QREV car .The virtual prototype includes front suspension,back suspension, steering and tire subsystem. It researches the ability and stabilization of Braking Performance through Braking of straight line and Braking of swerve. The results of simulation show that the car has a better Braking Performance, and can meet the requirements of the design.