크랙선단에서의 수소의 농도 분포에 대한 연구

The study on the distribution of hydrogen ahead of crack tip

  To modify the crack model developed by Wilkinson and Vitek, the concentration of hydrogen ahead of crack tip was calculated by numerical method. Backward Time, Centered-Time method was adopted. The concentration of hydrogen ahead of crack tip was varied with initial hydrogen concentration, the coefficient of diffusion of hydrogen and the strength of materials. The coefficient of diffusion of hydrogen has more effect than initial concentration of hydrogen on the saturation time in the elastic region. The higher the strength of materials, the greater the concentration of hydrogen.