PSI - Issue 54

Available online at www.sciencedirect.com Structural Integrity Procedia 00 (2023) 000 – 000 Available online at www.sciencedirect.com ^ĐŝĞŶĐĞ ŝƌĞĐƚ Structural Integrity Procedia 00 (2023) 000 – 000 Available online at www.sciencedirect.com ^ĐŝĞŶĐĞ ŝƌĞĐƚ

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

ScienceDirect

Procedia Structural Integrity 54 (2024) 490–497

© 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 scientific committee of the ICSI 2023 organizers Click here and insert your abstract text. © 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 scientific committee of the ICSI 2023 organizers Keywords: Type your keywords here, separated by semicolons ; Abstract The mechanical efficiency of a composite structure often depends on the strength of the joints that connect different parts to form a load path. Composite T-joints are commonly used in aerospace, marine, and civil engineering applications due to their lightweight and high strength properties. The complex stress distribution and geometric variations in these joints can lead to premature failure, careful attention is necessary in wing structures at skin-to-spar and skin-to-rib joints that are subjected to extreme load conditions. One type of structural joint is the composite sandwich with monolithic laminated material, which can offer significant advantages such as increasing material bending rigidity without adding considerable weight. Several approaches have been proposed to improve the performance of this joint and especially T-joints and reduce the risk of failure. These include optimizing the joint geometry and laminate stacking sequence, improving the manufacturing process, and using advanced materials such as nanocomposites and hybrid composites. However, the mechanical behaviour of this type of component has not yet been fully explored. This research aimed to study the modes of structural failure that include matrix cracking, fiber breakage, and interlaminar shear of these joints under tension, compression and shearing loads using the finite element method and verify the different designs of joints. The obtained numerical results were validated by experimental tests and the best results from compressive test are used for unmanned aerial vehicle structures especially integrated with solar panels. Click here and insert your abstract text. © 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 scientific committee of the ICSI 2023 organizers Keywords: Type your keywords here, separated by semicolons ; International Conference on Structural Integrity 2023 (ICSI 2023) Failure analysis of a composite structural spar and rib-to-skin joints Wojciech Skarka a,c, * , Ramesh Kumpati a , Michał Skarka b * a Department of Fundamentals of Machinery Design, Silesian University of Technology, Konatskiego 18A, 44-100 Gliwice, Poland b Faculty of Aerospace Engineering, Delft University of Technology, Kluyverweg 1, 2629 HS Delft, The Netherlands c SkyTech eLab LLC, Konarskiego 18C, 44-100 Gliwice, Poland Abstract The mechanical efficiency of a composite structure often depends on the strength of the joints that connect different parts to form a load path. Composite T-joints are commonly used in aerospace, marine, and civil engineering applications due to their lightweight and high strength properties. The complex stress distribution and geometric variations in these joints can lead to premature failure, careful attention is necessary in wing structures at skin-to-spar and skin-to-rib joints that are subjected to extreme load conditions. One type of structural joint is the composite sandwich with monolithic laminated material, which can offer significant advantages such as increasing material bending rigidity without adding considerable weight. Several approaches have been proposed to improve the performance of this joint and especially T-joints and reduce the risk of failure. These include optimizing the joint geometry and laminate stacking sequence, improving the manufacturing process, and using advanced materials such as nanocomposites and hybrid composites. However, the mechanical behaviour of this type of component has not yet been fully explored. This research aimed to study the modes of structural failure that include matrix cracking, fiber breakage, and interlaminar shear of these joints under tension, compression and shearing loads using the finite element method and verify the different designs of joints. The obtained numerical results were validated by experimental tests and the best results from compressive test are used for unmanned aerial vehicle structures especially integrated with solar panels. International Conference on Structural Integrity 2023 (ICSI 2023) Failure analysis of a composite structural spar and rib-to-skin joints Wojciech Skarka a,c, * , Ramesh Kumpati a , Michał Skarka b * a Department of Fundamentals of Machinery Design, Silesian University of Technology, Konatskiego 18A, 44-100 Gliwice, Poland b Faculty of Aerospace Engineering, Delft University of Technology, Kluyverweg 1, 2629 HS Delft, The Netherlands c SkyTech eLab LLC, Konarskiego 18C, 44-100 Gliwice, Poland

* Corresponding author. Tel.: +48 32 237 14 91; E-mail address: wojciech.skarka@polsl.pl * Corresponding author. Tel.: +48 32 237 14 91; E-mail address: wojciech.skarka@polsl.pl

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 scientific committee of the ICSI 2023 organizers 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 scientific committee of the ICSI 2023 organizers

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 scientific committee of the ICSI 2023 organizers 10.1016/j.prostr.2024.01.111