Abstract
Foreign object damage is attributed to dents formed by foreign objects such as debris and wear particles. It is important to clarify the behaviors of dent formation and stresses on contact surfaces in order to investigate the influence of foreign object damage on surface durability. Plastic deformation and formation of crown shape dent on contact surface were analyzed with elasto-plastic FEM analysis. A semispherical foreign object with a diameter of lOOμm was pressed against an elastic-perfectly plastic solid surface with a yield stress of 800 MPa or 1600 MPa Dent formation, crown height, contact pressure, and subsurface stress calculated with rigid foreign object were compared with those with elastic-perfectly plastic one.
