Fracture toughness of a rigid polyurethane foam: experimental and numerical investigation by varying the specimen sizes. - Vantadori, Sabrina; Carpinteri, Andrea; Cerioni, Roberto; Ronchei, Camilla; Scorza, Daniela; Zanichelli, Andrea; Marsavina, Liviu (Fatigue & Fracture of Engineering Materials & Structures, 2023)