Critical distance default values for structural steels and a simple formulation to estimate the apparent fracture toughness in u-notched conditions

The authors of this work would like to express their gratitude to the Spanish Ministry of Science and Innovation for the financial support of the Project MAT2014-58443-P: “Analisis del comportamiento en fractura de componentes estructurales con defectos en condiciones de bajo confinamiento tensional”, on the results of which this paper is based.