Finite Element Analysis of Stress Distribution on Bearing Alloy
LIU Chun hui, WANG Cheng tao, CHENG Xian hua (School of Mechanical Eng., Shanghai Jiaotong Univ., Shanghai 200030, China)
A three layer cylinder model containing alloy, steel lining and housing was established. With the help of finite element method(FEM) software package ANSYS, and considering the stress change along alloy thickness, the bearing stress especially in alloy layer was calculated. The results show that the tangential stress distribution is decided by pressure gradient, that is, the maximum tensile stress locates where maximum pressure gradient is, while the compressive stress locates where pressure gradients change their direction. The distribution of radial stress is the same as that of oil film pressure, which means compressive stress at the pressure region. The radial and tangential stress maximums are both in the inner surface of bearing alloy. The shear stress is near the maximum pressure, and reaches max at the bonding surface of mid section between backing and alloy. It is proved by theoretical calculation that the thinner the alloy, the higher the bearing fatigue strength.
【CateGory Index】： TH133.3