Papers by Keyword: Tire

Abstract: It is very important for vehicle handling to match right tires. Mechanics characteristic test is done for the different type tire, the mathematical model is set up according to test data. A dynamic model of vehicle is set up to study the effect of tire performance to vehicle handling stability. Vehicle dynamic response is researched on sinusoidal input of the steering wheel angle. Linear fitting of vehicle dynamic response is done in linear region. According to the difference between the simulation value and linear fitting, different tires are rated.

Abstract: A method of suspension optimum design based on the tire and vehicle matching was introduced in this paper. Firstly, the vehicle handling stability evaluation standards considering tire matching with vehicle were determined by the subjective and objective assessment. Secondly, the quality, suspension kinematics and compliance characteristics and tire mechanics of prototype were tested. The vehicle model of prototype was built in Carsim with the corresponding experiment data. The model was verified by the results of the vehicle handling stability tests. Then a combination simulation platform was developed by making use of Isight, Matlab and Casim. Finally the optimal design of suspension kinematics and compliance characteristics and tire mechanics were conducted, taking straight running performance index, high-speed driving safety index and high-speed cornering performance index as the objective. The simulation results indicated that after optimization, the straight running performance and high-speed cornering performance of prototype could be improved.

Abstract: Tire rolling resistance is one of the most important resistive forces acting on road vehicles. It depends on tire and surface characteristics as well as vehicle operating parameters. This paper deals with the influence of road surface texture on rolling resistance of passenger car tires. Results of road measurements performed on variety of road surfaces are presented.

Abstract: Run flat properties are required for tires intended for special applications like military or rescue vehicles. Run-Flat inserts make possible to drive a car or truck, with certain restrictions, also when inflation pressure is very low or non-existing (after tire damage). Rolling resistance of tires rolling on the inserts increases considerably in relation to the rolling resistance of properly inflated tires. This paper presents results of rolling resistance measurements for such conditions.

Abstract: This system is a self-developed real-time thickness inspection system including high-precision laser sensors and a mobile platform for on-line detection of tire rubber skin. The measurement data is used to calculate the standard deviation and process capability indices, and to evaluate measurement capacity. The system is a real-time measurement system in which the obtained measuring data compare with the standard value and show any errors. A technician can adjust the process parameters precisely on-line to improve product quality. The standard deviation of repeatability of the system for height is within +/- 0.0081 mm. The repeatability error of the horizontal sliding rail is within 0.0145mm, while the measurement error between this system and a coordinated measuring machine is within 0.028mm.

Abstract: Special software for tire vulcanization simulation was developed using ABAQUS software as the core solver and Visual Basic6.0 as the develop language. The software was based on principles of easy operation, professional and intelligent analysis. In this way, automation and professionalization of the analysis process were performed. The special software mainly consists of three functions: Firstly, model grid was automatically recognized, and corresponding configuration files were automatically built, which were required in the analysis preprocess. Secondly, ABAQUS solver was invoked to solve the model. Finally, results such as state-of-cure, temperature and other curing performances were automatically extracted and saved as excel or word format. Besides, the curing profiles could be proposed. The results showed that this software is easy to use and work efficiently.

Abstract: As for the two typical inputs of pure side slip angle and pure yaw angle, this paper presents the in-depth analysis of lateral force, aligning torque and relaxation length respectively within the domains of distance and spacial frequency, and also explains the test results by theoretical model. Within the small side slip angle, tire is a first-order linear system. Relaxation length is equivalent to the time constant of linear system, which decreases as slip angle increases. It indicates the dynamic performance of tire system.

Abstract: A 3D triangle balance contour tire model was established by using ABAQUS software as a platform. During the calculation of the model, static loading process and cornering loading process were taken into account, and the mises pressure and contact pressure distribution and the transverse stiffness performance curve of the tire were obtained. The analysis results were compared with that of the existing design. The results of the triangle balance contour tire were beneficial to optimize the structure of tire and could provide reasonable basis for predicting the performance of tire.

Abstract: The influence of curing pressure on rubbers’ mechanical properties was researched with experiment. The results show that the curing pressure increased appropriately can improve the curing rate and shorten the curing time. Meanwhile the curing pressure increased also can enhance the tensile strength and 300% stress at definite elongation of the rubber cured but reduce the elongation at break, tension set, tearing strength and the abrasion property of the tread rubber. The properties of each rubber are different from each other with the same curing pressure.

Abstract: To better reflect the dynamic performance of landing gear, a hybrid modeling method based on Matlab/SimMechanics is proposed as our approach and drop simulations were carried out for it to verify our approach. Firstly, a widely used levered-suspension landing gear is chosen as studying subject. Secondly, the mathematic models of the respective landing gear subsystem were established for the bumper and the tire, while braking control system was imposed via Simulink. Thirdly, SimMechanics was used to integrate all the subsystems into a comprehensive unit by taking advantage of its capability of showing the joint constraint, force reaction of each part, and on-line control law imposing. Lastly drop simulation tests were done on the landing gear model to verify its validity. The simulation results show that our approach can effectively simulate the drop feature, and accordingly provides a foundation for retrofit design in the next step, and thus makes it is valuable for real engineering applications.