Remaining Strength Evaluation Based on the Fractal Character of the Pitting

A study on pitting mechanism of corroded pipeline is made.The study discovers that the overall corrosion surface of pitting is uneven,which has a random or similarity in statistics,and consider the pitting presents fractal character.Two shapes of pitting are structured based on the fractal character of pitting and one of the two pittings is selected to be simulated according to the actual pipeline.Finite element method is adopted to analyze the remaining strength of the 3 pittings of a pipe and relative conclusions are obtained.