Thermomechanical analysis of an aircraft tire in cornering using coupled ale and lagrangian formulations

Abstract

Abstract:The thermomechanical behavior of an aircraft tire is predicted, using experimental devices, a model based on finite element software and an appropriate method of expressing the heat generated by skid in terms of the local friction coefficient, depending on the temperature. In the thermomechanical model, a steady state mechanical analysis is combined with a transient thermal problem. This combined approach is based on three main computing steps: the deformation step, the dissipation step and the thermal step. The deformation step calculates the stress and the velocity fields, which are used as inputs in the dissipation step to calculate the heat generated due to friction. The internal dissipation is assumed to be negligible. Finally, the thermal step yields new thermal maps based on the heat flux computed in the dissipation step. The coupling is established by updating the friction coefficient in the first two steps.

Aircraft Tire Temperature at Touchdown with Wheel Prerotation

“…The speed was set at 13.89 m/s ( ) in order to capture the temperature after 4m of sliding distance. Figure 5 shows the tire force and a temperature profile of , which is in very good agreement with an error of only 2.36% compared with a temperature value of , which was achieved in [16]. …”

“…The tire rubber is hyper elastic material, which is defined based on the standard material model available in ANSYS. Table 2 shows the tire tread material properties [16]. Mooney-Rivlin material model has been considered because the tire tread contains a rubber compound with available constants.…”

“…In [16], an aircraft tire in cornering modeled using finite element software and experimental devices for pure sliding rubber. They tested the fully skidding wheel under a constant vertical load and a sliding speed to estimate heat generated by friction.…”

Experiment and Simulation Research on the Fatigue Wear of Aircraft Tire Tread Rubber

“…The most crucial aspect of aircraft tire wear simulation is the realistic description of the processes in the contact interface between the tire’s tread and the road surface such as the imitation of the sliding condition, distribution of temperature, and stress of rubber block with different shapes [ 18 , 19 ]. In the work of Kongo [ 20 ], a non-uniform computed thermal flux was applied to the tire surface corresponding to the contact area and rotated around the tread to simulate the heat generation during the rolling process. Alroqi and Wang [ 21 ] succeeded in reducing the temperature rise by pre-spinning the wheel in their simulation.…”

Case study on aircraft tyre wear in Y12 aircraft tyres

“…Three of these research studies were done by NASA (8–10) and they considered only the influence of temperature on aircraft tyres. When determining the thermomechanical behaviour of aircraft tyres, the researchers mustdeal with such nonlinearity parameters as geometry, the properties of the aircraft tyre materials, the friction coefficient, the dissipative mechanisms, and the thermal coefficients (11) . But it is very challenging to analyse those parameters as aircraft tyres experienced different operational and environmental conditions while in service (12) .…”