Patent ID: 11907624
Assignee: TIANJIN UNIVERSITY
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 5:
6. The method for characterizing the propagation of the metallic short cracks and long cracks according to claim 5, further comprising:
after the process of acquiring the crack tip opening displacement caused by monotonic tensile, performing a modification on the crack tip opening displacement caused by monotonic tensile based on influences of static toughness dissipation and strain energy releasing at crack tip on fatigue damage of metal materials, wherein an expression of the modification is:, T
   m
  
  =
  
   
    
     σ
     ys
    
    
     U
     T
    
   
   ⁢
   
    φ
    mt
   
  
 

wherein UT is static toughness.