The present work, motivated by failures in rolling components, gives a more exact treatment of the subsurface crack lying parallel to the surface, subjected to a moving compressive normal surface force and transmitting frictional forces between its faces, than has hereto been presented. In particular, the variations of the maximum value of K(,II) and its range ((DELTA)K(,II)) with the coefficient of friction (f) and the crack length/depth ratio (L/a) are investigated. Also of interest is the influence of possible Mode I action at the two crack tips. The presence of a moving load and crack face friction make the problem history dependent, and one would not necessarily expect equal variation of K(,II) and K(,I) at the two crack tips. Furthermore, this history dependence requires that a modification be made to the well established elasticity-dislocation approach to studying linear elastic contact problems, in order that the problem can be treated incrementally.Ph.D.MechanicsUniversity of Michiganhttp://deepblue.lib.umich.edu/bitstream/2027.42/160593/1/8512505.pd
