1997 Volume 63 Issue 607 Pages 471-477
This paper deals with the surface fatigue crack growth behavior in cemented carbides and ceramics under repeated rolling contact with frictional heating. In this analysis, a surface crack is modeled as an inclined planar surface crack in a three-dimensional half-space. Rolling contact is simulated as a long and narrow distributed load with both normal and shear components moving with constant veloccity. First, the three modes of stress intensity factors along the crack contour are analyzed. Next numerical calculations of the stress intensity factors are carried out for cemented carbides and ceramics. On the basis of these data, numerical results for crack growth contours are given based on a modified Paris power law. The threshold values are obtained by rotary and plane bending fatigue tests for WC-Co cemented carbides and Si3N4 ceramics. Morever, the thermal effects on the crack propagation life are considered for each material.
TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series C
TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series B
TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series A
Transactions of the Japan Society of Mechanical Engineers Series C
Transactions of the Japan Society of Mechanical Engineers Series B
