Finite Element Analysis Model of High Cycle Fatigue Damage for Metal Structure

This paper gets some material constants of elastic and plastic fatigue damage evolutionary equations from high and low cycle fatigue experiments of unnotched metal samples on the basis of fundamental principles of damage mechanics. Then, the finite element program ANSYS is used to simulate the development of crack of notched metal samples under high cycles of constant-amplitude stress and the distributions of elastic and plastic areas and so on. The whole variation of stress field, strain field and damage field are completely described. Finally, to compare it with the experimental results, the applicability and practicability of the model is appraised.