STRESS INTENSITY FACTORS OF A SUBSURFACE CRACK IN A SEMIINFINITE BODYDUE TO ROLLING SLIDING CONTACT AND HEAT-GENERATION/

This paper deals with the two-dimensional thermoelastic contact proble m of a rolling rigid cylinder of specified shape, which induces of fri ction and heat generation in the contact region, moving with constant velocity in an elastic half-space containing a subsurface crack. In th e present temperature analysis, the speed of the moving heat source is assumed to be much greater than the ratio of the thermal diffusivity and the contact length. The problem is solved using complex-variable t echniques and is reduced to singular integral equations which are solv ed numerically. Numerical results of stress intensity factors are obta ined for a relatively short crack. The effects of the frictional coeff icient, the sliding/rolling ratio, the crack depth and the crack angle on the stress intensity factors are considered.