Abstract: Electric power fittings located in the strong wind area are prone to abrasive wear. In order to study abrasive wear mechanism of electric power fittings, the wear process of a ring chain line fitting is simulated based on the finite element method. It is indicated that the maximum stress of the U-shaped ring is 692.2 MPa, far exceeding the yield strength of 45# steel which is equal to 355 MPa. After 1 400 times of abrasive wear, a negative strain along the Z-axis is shown on the contact area of the U-shaped ring, and plastic deformation outward in both the X and Y directions is observed. The wear rate of U-shaped ring makes a cycle that repeats itself from large to small and then from small to large.

Key words: line fitting, abrasive wear, stress, strain, remain dimension, yield strength