Research on Elastic Composite Cylindrical Roller Bearing Contact Fatigue Based on the Subsurface Stress
Table 4
Analysis of the results of subsurface shear stress.
Filling degree interval of elastic composite cylindrical roller
Subsurface equivalent stress
Reason
Depth change trend
Size change trend
40%-55%
Rise
Raise first and then lower
With the increase of filling degree, the rigidity of elastic composite cylindrical roller decreases, the contact half width increases, the depth of subsurface shear stress also increases, and the shear stress varies irregularly.
55%-60%
Reduce
Rise
With the increase of the filling degree, the mechanical properties of the bearing materials show a nonmonotonic change. The filling degree of the elastic composite cylindrical roller reaches the peak at 55% of the subsurface shear stress depth, the stress value is not large, and the stress continues to increase.
60%-70%
Rise
Rise
With the increase of filling degree of elastic composite cylindrical roller, the stress of bearing material under load has exceeded its limit, so the subsurface shear stress presents a monotonous upward trend.