An approach for prediction of the fatigue crack initiation in the airframe metal structure

An approach for prediction of the fatigue crack initiation in airframe metal structures

A) Local strain concept	B) FE modeling
Energy based criterion for fatigue damage accumulation Residual strain amplitude as the criterion parameter An algorithm to build up stress-strain history in a notch tip	Sub-modeling procedure for global-local hierarchical FE analysis of complex structure with concentrations Linear material behavior within FE analysis Contact problem for stress concentration around a fastener