温度与载荷协同作用下深地钻具径向轴承的表面损伤行为OA

The stress and strain distributions of radial bearings for deep drilling tools under the syner-gistic effects of temperature and load are studied via finite element simulations using ANSYS Workbench.The simulation results show that the maximum equivalent stress and strain occur near the cemented carbide-solder interface(i.e.,the welding interface)and the cemented carbide-cemented carbide interface(i.e.,the sliding interface).Temperature significantly increases the stress and strain levels;the maximum equiva-lent stress and strain at 300 ℃ are approximately 2.5 times higher than those at 100 ℃.The frictional stress at both ends of the bearings is higher than that in the middle region,making the end regions more suscep-tible to adhesive wear.The simulation results are in good agreement with the damage distribution character-istics observed after field application,indicating that these findings can provide a theoretical reference for the optimal design of radial bearings.