This thesis is a work in which the surface crack propagation on porous carburized pre alloyedrnsteel subjected under rolling-sliding contact was predicted using numerical approach. The effectrnof contact load, coefficient of frictional on equivalent stress distribution and pressure distributio nrnis incorporated during FEM analysis In addition, the effect of crack face friction and lubricatio nrnpressure, in a mixed mode crack propagation is determined at a mean pressure which shows seekingrnto generalize the parametric influence on the rolling-sliding contact fatigue. Since the material isrnporous the initial crack is formed at the center of contact with 2D plain strain condition andrnelliptical contact parameters determines using Hertz contact theory. The pre alloyed carbonizedrnsteel material modelling problem is assumed to be taken as the mean value. Surface propagationrnis analyzed using energy approach with energy based damage evolution is selected for the crackrnpropagation simulation with extended finite element method. The initial crack propagated at arnmean maximum pressure and the coefficient of friction effect is seen, which varies the position ofrnmaximum equivalent stress along the surface. When crack face and surface contact frictio nrndecrease, the crack length increases and further increase to a large value under the effect ofrnlubrication pressure that results in facilitating crack propagation. The Comparison between thernnumerical results with the given experimental result shows consistency at a pressure of 960MPa.