The effect of wear on ThermoElastic Instabilities (TEI) in bimaterial interfaces

Simulation of thermoelastic coupling in silicon single crystal growth based on alternate two-stage physics-informed neural network

This paper aims to determine the effect of contact geometry on temperature distribution and thermal buckling in an in-wheel brake system. Numerical analysis is conducted to investigate the variatio...

Effect of contact geometry on temperature field distribution and thermal buckling of an in-wheel disc brake system

Thermoelastic instabilities in automotive disk brakes and clutches.

Thermal buckling deformation can significantly impact the operating performance of hydro-viscous drive. A thermal buckling finite element shell model was established with the nonlinear radial tempe...

Numerical investigation into thermal buckling of friction pairs in hydro-viscous drive under nonlinear radial temperature distribution:

Rotor systems with coupling consist of two rotors, rolling bearings, sealing components, and nonlinear coupling. Currently, rotor systems with coupling are widely used in marine engines, aerospace engines, and various vehicle engines. In studies of rotor systems with coupling, the coupling connecting both sides of the rotor are often regarded as a linear stiffness unit. But in actual engineering, the torsional stiffness of the coupling varies with the speed of the system, and the variation of the coupling stiffness will affect the dynamic characteristics of the rotor. Based on the above phenomena, this study establishes the rotor model of driveshaft-Geislinger coupling-driveshaft in diesel engines and obtains the modal, frequency, and transient response analysis results of the rotor system with nonlinear Geislinger coupling. The modal, frequency, and transient response analysis results of the nonlinear model are compared with those of the linear model. This study can provide theoretical support for the vibration analysis of nonlinear rotor systems with connected Geislinger coupling.

/pdf/dynamics-analysis-of-the-nonlinear-rotor-system-with-1tu2ehma.pdf

Dynamics analysis of the nonlinear rotor system with Geislinger coupling

Under cyclic loading, fatigue failure often occurs in the track supporting structure, which is welded on the side deck of the vehicle body. In this paper, the fatigue reliability of track supporting structure is calculated by the track dynamic analysis, welding seam damage modeling , and random sampling method. First, the digital model of typical pavement roughness is established; then, a design plan for the fatigue simulation test of the track supporting structure is proposed, the dynamic analysis of the track supporting structure is carried out, and the fatigue damage response surface model is constructed; finally, the fatigue reliability of the supporting structure under random working conditions is calculated by Monte Carlo random sampling method. In that case, the influence of road grade and vehicle speed to fatigue characteristics are obtained. Results show that the pavement roughness is positively correlated with the fatigue reliability of the track supporting structure, while the driving speed has opposite trend. Therefore, in the track supporting structure design, the influence of random combination characteristics of working conditions must be fully considered, and the reliability analysis can be executed by dynamic simulation and random data drive technology. 

Fatigue reliability calculation of track supporting structure based on vehicle dynamic analysis

Tracked vehicles are widely used in agriculture, military, construction and other fields because of their high passability, super climbing ability and high traction, and their dynamic performance directly determines the ride comfort and running stability of the vehicle. Identifying the sensitive factors that affect the dynamic characteristics of tracked vehicles has important engineering value in improving the dynamic performance of the vehicle. In this paper, the dynamic modeling and sensitive factor analysis of the tracked vehicle are carried out. Focus on the different flexibility treatment methods, road slope, speed and other parameters of the tracked body and balance elbow, and discuss the influence of different factors on the dynamic performance. The results show that the compliance of the balance bend and the body in the rigid-flexible coupled model will lead to changes in the equivalent stiffness and damping of the entire body, resulting in significant changes in the dynamic response. The acceleration response is greatly affected by the high frequency mechanism, and the pitch angle response is greatly affected by the low frequency mechanism.

Rigid-flexible coupling dynamics modeling and sensitive factor analysis of tracked vehicles

Buckling and postbuckling of automotive clutch disks can be excited by the temperature fields caused by frictional heat generation during engagement of clutch systems. Linear and nonlinear buckling...

Prediction of thermally induced postbuckling of clutch disks using the finite element method

The coupling between thermal buckling and thermoelastic instability in clutch disks is investigated using a series of finite element analyses. The temperature distributions are first obtained from the eigenmodes based on the classical thermoelastic instability analyses. The critical buckling temperatures along with the buckling deformation modes of the clutch disk under prescribed temperature fields are subsequently computed using the commercial finite element software ABAQUS. The effects of multiple parameters including sliding speed, coefficient of friction and boundary conditions have been investigated. It is concluded that there exists a strong coupling between thermoelastic instability and thermal buckling, and that the thermoelastic instability induced unstable temperature modes can significantly alter the input temperature profiles for thermal buckling, and thus the critical buckling temperatures. In addition to the effects of axisymmetric thermoelastic instability modes (i.e. banding modes), therm...

https://journals.sagepub.com/doi/pdf/10.1177/1350650118772664

Numerical analysis of the coupling between frictionally excited thermoelastic instability and thermal buckling in automotive clutches

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