The effect of primary loading on fatigue life of cylindrical roller bearings

7th International Conference on Advanced Concepts in Mechanical Engineering

Creu, S.S.^1

Mechanical Engineering, Mechatronics and Robotics Department, Gheorghe Asachi Technical University of Iasi, Iasi, Romania^1

关键词: Axial profiles;    Compressive residual stress;    Contact pressures;    Elastic-Plastic;    Misalignment angles;    Operating loads;    Plastic analysis;    Rolling contacts;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/147/1/012011/pdf
DOI  :  10.1088/1757-899X/147/1/012011

来源: IOP

【 摘 要 】

Experimental and theoretical works shown that if a roller-raceway rolling contact is loaded in the elastic-plastic domain then, after the first rolling cycles, the material elastically shakedowns to a slightly modified axial profile and stable compressive residual stresses. Fatigue life tests carried out on four groups of NJ206 cylindrical roller bearings pointed out the superiority of the bearings groups that primary supported a few cycles of rolling loading in the elastic-plastic domain. An elastic-perfect plastic analysis was performed to reveal the role played by the roller's crowning geometry, operating clearance, misalignment angle and operating loads on contact pressures distributions achieved between each roller and the corresponding inner and outer raceways. The modified reference rating lives, evaluated using the lamina technique, exposed a good agreement with the values provided by fatigue life tests.