The Trans-Varestraint test was modeled with finite element method (FEM) and the local strains in the trail of weld molten pool were obtained with different bending strains.

Reliability analysis method of partial strain;

Study of plasticity gradient volume element and start-up mechanism of strain localization;

Capturing strain localization initiation with adaptive finite element method;

Elasto-viscoplastic finite element analysis for strain localization problems with embedded localized softening bands;

Then, in addition to the local strain way, the erosion of environment anode solution during corrosive fatigue crack initiation is quantitatively calculated.