This is a postprint version of the following published document: Rubio,P., Muñoz-Abella, B., Rubio,L. (2017).Neural approach to estimate the stress intensity factor ofsemi- elliptical cracks in rotating cracked shafts in bending. Fatigue & Fracture of Engineering Materials & Structures, 41(3), pp.539–550. DOI: https://doi.org/10.1111/ffe.12717 © 2017 Wiley Publishing Ltd. brought to you by CORE View metadata, citation and similar papers at core.ac.uk provided by Universidad Carlos III de Madrid e-Archivo