How do you perform fatigue crack growth analysis using Paris law?

Fatigue crack growth analysis uses the Paris equation: da/dN = C(Delta K)^m, where da/dN is crack growth rate, Delta K is stress intensity factor range, and C, m are material constants. Analysis procedure: Define initial crack size (manufacturing defect or inspection threshold), calculate K using handbook solutions or FEM, integrate growth rate to find cycles for crack to reach critical size (fracture toughness), and account for load spectrum using cycle counting (rainflow) and retardation models (Wheeler, Willenborg). Critical considerations include threshold behavior at low Delta K, da/dN curve nonlinearity, and environment effects. Results determine inspection intervals.