8. notes

It is necessary to take precautions when using the FORCE_NODALE keyword in the CALC_G command. The load creates a singular field of constraint in the vicinity of its point of application. In the particular case we are dealing with, where the load is close to the bottom of the crack, and therefore to the crowns, the upper radius of the calculation ring of \(G\) must not reach the singular field created by the load (at the risk of having false results).