1. Applications of Fracture Mechanics to Crack Growth at Notches
Numerical Solution: Newman 1971 L*
L*: Transitional crack length
For crack length l ≥ 10% c: crack effective length is from tip to tip!!! (including notch)
Example: 2c = 5 mm, L* = 0.25 mm c = 25 mm, L* = 1.21 mm

2. Variación de la tensión con la distancia:
Para r = 1.25 ro:
Kt cae de 3 ->2

3. Consequences: plane window
For relatively small (5-10 % notch size) cracks at a hole or at a notch, the stress intensity factor K is approximately the same as for a much larger crack with a length that includes the hole diameter / notch depth.
Reading: Fatige and the Comet Airplane (taken from S. Suresh, Fatigue of Materials)