PSI - Issue 37

ScienceDirect Structural Integrity Procedia 00 (2021) 000 – 000 Structural Integrity Procedia 00 (2021) 000 – 000 Available online at www.sciencedirect.com Available online at www.sciencedirect.com ScienceDirect Available online at www.sciencedirect.com ScienceDirect

www.elsevier.com/locate/procedia www.elsevier.com/locate/procedia

Procedia Structural Integrity 37 (2022) 17–24

© 2022 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of Pedro Miguel Guimaraes Pires Moreira Abstract Structural integrity analysis of ships in collisions and groundings requires a realistic idealization of environmental and operational conditions within computational models. In essence, the problems are solved as Fluid-Structure-Interaction problems in which structural mechanics has an important role by modeling the contact. The accuracy of structural predictions in as-built and as operated structures can only be improved by properly understanding the phenomena present in full- and laboratory-scale. This paper investigates experimentally the modeling uncertainties with quasi-static experiments on single-sided stiffened and double skinned steel sandwich panels. Results reveal the importance of uncertainties associated with the panels' boundary conditions on how they affect the roles of membrane and bending load-carrying mechanisms and loading, material, and structural gradients that affect the initiation of the final fracture. © 2022 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Abstract Structural integrity analysis of ships in collisions and groundings requires a realistic idealization of environmental and operational condi ions within computati nal models. In es ence, the problems are olv d as Fluid-Structure-I teraction problems in which structural mec a i s has n important role by modeling the contact. The accuracy of structural predictions in as-built and as operated stru tures can only be improved by properly understa ding the phenomena presen in full- and laboratory-scale. This paper investigates experimentally the mo eling uncertainti s with quasi-static exp riment on single sided stiffened and double skinned steel sandwich panels. Results rev al the importance of uncertain ies associated with the panels' boundary co iti ns on how they affect the roles of membrane and bending load-carrying m cha isms and loading, mat rial, and str ctural gra ients that affec the initia ion of the final fractur . © 2022 The Authors. Publ shed by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review u der re ponsibility of Pedro Miguel Guimara s Pires Moreira K ywords: Steel panels; crashworthiness; collision; dynamic failur ; quasi-static lo ding 1. Introduction Structural integrity analysis of ships in collisions and groundings requires a realistic idealization of environmental and operational conditions within computational models. In these Fluid-Structure-Interaction problems, structur l mechanics has an imp rtant role in modeling the contact. The classical division tr ats the external mechanics associated with ship otions during the collision and the internal mechanics related to the tructural defor ations a ICSI 2021 The 4th International Conference on Structural Integrity Experimental Investigations on Stiffened and Web-core Sandwich Panels Made for Steel under Quasi-Static Penetration Jani Romanoff a *, Mihkel Kõrgesaar b , Pauli Lehto a , Kennie Berntsson a , Heikki Remes a ICSI 2021 The 4th International Conference on Structural Integrity Experimental Investigations on Stiffened and Web-core Sandwich Panels Made for Steel under Quasi-Static Penetration Jani Romanoff a *, Mihkel Kõrgesaar b , Pauli Lehto a , Kennie Berntsson a , Heikki Remes a a Marine Technology, Department of Mechanical Engineering, Aalto University, Finland b Estonian Maritime Academy, Tallinn University of Technology, Tallinn, Estonia a Marine Technology, Department of Mechanical Engineering, Aalto University, Finland b Estonian Maritime Academy, Tallinn U iversity of Technology, Tallinn, Estonia Peer-review under responsibility of Pedro Miguel Guimaraes Pires Moreira Keywords: Steel panels; crashworthiness; collision; dynamic failure; quasi-static loading 1. Introduction Structural integrity analysis of ships in collisions and groundings requires a realistic idealization of environmental and operational conditions within computational models. In these Fluid-Structure-Interaction problems, structural mechanics has an important role in modeling the contact. The classical division treats the external mechanics associated with ship motions during the collision and the internal mechanics related to the structural deformations as

* Corresponding author. Tel.: +358 50 511 3250. E-mail address: jani.romanoff@aalto.fi * Corresponding author. Tel.: +358 50 511 3250. E-mail ad ress: jani. omanoff@aalto.fi

2452-3216 © 2022 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of Pedro Miguel Guimaraes Pires Moreira 2452-3216 © 2022 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review u der re ponsibility of Pedro Miguel Guimara s Pires Moreira

2452-3216 © 2022 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of Pedro Miguel Guimaraes Pires Moreira 10.1016/j.prostr.2022.01.055