PSI - Issue 47

ScienceDirect Structural Integrity Procedia 00 (20 1 9 ) 000 – 000 Available online at www.sciencedirect.com Available online at www.sciencedirect.com ScienceDirect

www.elsevier.com/locate/procedia

Procedia Structural Integrity 47 (2023) 125–132

© 2023 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 the IGF27 chairpersons Abstract In the analytical calculation of Hull Girder Ultimate Strength using Smith ’s method, the ship is divide d into several elements, where each element contributes to the total bending capacity of the ship. At this point, the ultimate strength assessment of stiffened panels which is part of the ship hull elements must be conducted cautiously by taking into account the undesirable conditions. The present paper studies the ultimate strength of stiffened panels under variations of initial imperfection geometrics with a particular degree of severity. Additionally, the geometry variations of the stiffened panel model have been carried out to obtain results according to actual conditions. The analysis was conducted using the finite element method by the commercial software ANSYS, and then the results were compared using the results from IACS-CSR. In general, results show that the initial imperfection geometric greatly decreases the ultimate strengths at around 10% for standard initial imperfection geometric and at around 7.8% percent for severe imperfection. © 2023 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 the IGF27 chairpersons Keywords: hull girder ultimate strength; IACS-CSR; stiffened panel; Smith’s method; finite element method 1. Introduction Activity of export and import across the globe is inseparable from commodities trading across the globe. To support this, reliable transport is demanded which has large capacity, affordable cost and capable to withstand various loadings and conditions, such as impact load [Do et al., 2022; Prabowo et al., 2020; 2021; 2022] and environment condition 27th International Conference on Fracture and Structural Integrity (IGF27) Effects of the geometrical imperfections on the ultimate strength performances: A case study on the designed-steel stiffened panel Muhammad Imaduddin Hanif a , Ristiyanto Adiputra b, *, Aditya Rio Prabowo a, *, Nurul Muhayat a , Erwandi Erwandi b , Nurul Huda c a Department of Mechanical Engineering, Universitas Sebelas Maret, Surakarta 57126, Indonesia b Research Center for Hydrodynamics Technology, National Research and Innovation Agency (BRIN), Surabaya 60117, Indonesia National Institute of Aquatic Resources, Technical University of Denmark, Lyngby 2800, Denmark

*Corresponding author. Tel.: +62-271-632-163; fax: +62-271-632-163. E-mail address: ristiyanto.adiputra@brin.go.id (R.A.); aditya@ft.uns.ac.id (A.R.P.)

2452-3216 © 2023 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 the IGF27 chairpersons

2452-3216 © 2023 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 the IGF27 chairpersons 10.1016/j.prostr.2023.07.003