applied fracture mechanics

Good Practice for Fatigue Crack Growth Curves Description 219Figure 13. Approximation criterion functions for different approximated values yi for the (-3yi, 3yi)interval – arrow for equation (32a)All advantages and disadvantages of the above presented LSM approximation criteria canbe seen on the graphs above, in particular:- significant dependence of values of components of the sum S (formula (15)) on theapproximated value yi;