Frictionally Excited Thermoelastic Instabilities of Annular Plates Under Thermal Pre-Stress

Abstract

Based on Kirchhoff’s plate theory a model is developed to estimate the onset of thermoelastic instabilities (TEI) in axisymmetric sliding systems consisting of plate components such as automotive disk breaks or clutches. The thermoelastic feedback due to a symmetric, two-sided frictional contact is formulated in terms of a thermal curvature proportional to the lateral deflection. The model of the thermoelastic feedback is tested with the help of an analytical solution of the two-dimensional layer model of Lee and Barber. For axisymmetrically annular disks under frictionally excited TEI, pre-stressed in-plane the solution of the resulting eigenvalue problem is obtained numerically. Some results are discussed and compared to the literature.