1 Fatigue Crack Growth Identification in Bonded Joints by Using Carbon Nanotube Doped Adhesive Films Xoan F. Sánchez-Romate a,b , Claudio Sbarufatti c *, María Sánchez b , Andrea Bernasconi c , Diego Scaccabarozzi c , Flavia Libonati c , Simone Cinquemani c , Alfredo Güemes a and Alejandro Ureña b a Department of Aerospace Materials and Processes, Escuela Técnica Superior de Ingenieros Aeronáuticos, Universidad Politécnica de Madrid, Plaza del Cardenal Cisneros 3, 28040 Madrid, Spain b Materials Science and Engineering Area, Escuela Superior de Ciencias Experimentales y Tecnología, Universidad Rey Juan Carlos, Calle Tulipán s/n, 28933 Móstoles (Madrid), Spain c Politecnico di Milano, Dipartimento di Meccanica, Via La Masa 1, 20156, Milano, Italy *Corresponding author: [email protected] Tel: +39 022399 8213 Keywords: adhesive films; carbon nanotube; fatigue; composites; damage identification