sentences:  Finite Element (FE) based solutions are available for two, non-symmetric through cracks at holes as well as cracks growing toward holes.This capability allows the analysis of more than one crack growing from a row of fastener holes.AFGROW implements five different crack growth models (Forman Equation,
   Walker Equation, Tabular lookup, Harter-T Method and NASGRO Equation
   ) to determine crack growth per applied cyclic loading.