The 3rd International Workshop on Aerostructures of the European Aeronautics Science Network (EASN), founded in 2008 as an independent European Association for coordinating and supporting the interests of the European universities and facilitate academia to perform funded research, was hosted by Politecnico di Milano on 9th-11th October 2013. It was included among the events to celebrate the 150th Anniversary of the foundation of Politecnico di Milano. The workshop was a successful event with about 120 participants from academia and industry. A total of 90 papers were presented. Most of them were developed in the framework of running projects funded in the 7th Framework Program and were object of interesting discussions, spanning a wide variety of matters in aerostructure design: from composite materials to new coating processes as repairing techniques, from security and reliability to cost efficiency and much more. In total scientific results from 27 running research projects, were presented, thus accenting the Workshop as a major European dissemination event for new knowledge and emerging technologies related to aerostructures. The present ebook of the International Journal of Structural Integrity includes a selection of the papers presented in a shorter version at the workshop regarding the subjects of this journal. They are representative of the high-scientific quality and technological merit of aeronautics research carried out in Europe.