Research on fracture life of pitch bearing ring material under bending and torsional alternating loads
The main reason for the fracture of pitch bearing rings during service is microcracks in the rings,which continue to expand in different fatigue ways until they break under the action of bending torsional alternating loads.For this reason,crack propagation was performed on the standard specimen to reflect the fracture process and life of the failure location of the pitch bearing ring.The equivalent load spectrum and crack growth model of the ferrule fracture position were determined,and the crack growth rate model was established according to the pure mechanical fatigue experienced by the pitch bearing,and the path and life of the crack propagation under the action of bending torsion alternating load were calculated.The crack growth simulation results showed that under the mechanical fatigue propagation of cracks,the pitch bearing rings containing microcracks could reach the service life,and the pitch bearing rings fail due to the simultaneous effects of corrosion and fatigue.
pitch bearingstandard specimenmechanical fatiguecrack growth rate model
NETL
NSTL
万方数据
维普
