Ultimate Strength of Cylindrical Shells with Cutouts Sang Eui Lee 1 , Selcuk Sahin 2,3 , Philippe Rigo 2 , Minsue Park 4 and Jeom Kee Paik 1,4,5* 1 The Korea Ship and Offshore Research Institute (The Lloyd’s Register Foundation Research Centre of Excellence), Pusan National University, Busan 46241, Republic of Korea 2 Naval Architecture and Transport Systems Department (LHCN), University of Liège, 6 Quai Banning, B4000 Liège, Belgium 3 Laboratoire d’Hydrodynamique, Energétique et Environement Atmosphérique (LHEEA), Ecole Centrale de Nantes, 44321 Nantes, France 4 Department of Naval Architecture and Ocean Engineering, Pusan National University, Busan 46241, Republic of Korea 5 Department of Mechanical Engineering, University College London, Torrington Place, London WC1E 7JE, UK *Corresponding author. Tel.: +82 51 510-2429. Email address: [email protected] (J.K. Paik)