PSI - Issue 51

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ScienceDirect Structural Integrity Procedia 00 (2022) 000–000 Structural Integrity Procedia 00 (2022) 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 51 (2023) 115–121

© 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 ICSID 2022 Organizers Abstract In this work, the behavior of composite curved adhesive joints under pressure ( p ) is analyzed; such joint configuration has applications in aircraft fuselages. The chosen substrates were Carbon-Fiber Reinforced Polymer (CFRP) and three substrate thicknesses ( t P ) were studied. In addition, three different curvature radii ( R ), and eight overlap lengths ( L O ) were evaluated, while only one adhesive type was used. An internal pressure of 1 MPa was considered in all cases. The analyses were performed using the finite element method (FEM) and cohesive zone modelling (CZM). The increase in L O causes a linear increase in the peak peel stresses (  yy ), affecting the thinner joints more; these peak stresses were located in the joint’s knee region. P max was also found influenced by t P and L O , being again the effect more noticeable on the thinnest substrate; however, for L O ≥40 mm the effect was negligible. As t P increased, P max had no significant improvement for L O ≥20 mm. Although increasing R causes a slight reduction in the peak stresses, the stresses along the bond line were more uniform. Although R had no significant effect on P max , it increases joint compliance. In conclusion, the chosen adhesive allowed to successfully explore the different geometric parameters where the thinner joints with the largest R showed the best performance. © 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 ICSID 2022 Organizers Keywords: Adhesive joints; structural adhesive; composite materials; cohesive zone models; aircraft fuselage Abstract In this work, the behavior of composite curved adhesive joints under pressure ( p ) is analyzed; such joint configuration has applications in aircraft fuselages. The chosen substrates were Carbon-Fiber Reinforced Polymer (CFRP) and three substrate thicknesses ( t P ) were studied. In addition, three different curvature radii ( R ), and eight overlap lengths ( L O ) were evaluated, while only one adhesive type was used. An internal pressure of 1 MPa was considered in all cases. The analyses were performed using the finite element method (FEM) and cohesive zone modelling (CZM). The increase in L O causes a linear increase in the peak peel stresses (  yy ), affecting the thinner joints more; these peak stresses were located in the joint’s knee region. P max was also found influenced by t P and L O , being again the effect more noticeable on the thinnest substrate; however, for L O ≥40 mm the effect was negligible. As t increased, P max had no significant improvement for L O ≥20 mm. Although increasing R causes a slight reduction in the peak stresses, the stresses along the bond line were more uniform. Although R had no significant effect on P max , it increases joint compliance. In conclusion, the chosen adhesive allowed to successfully explore the different geometric parameters where the thinner joints with the largest R showed the best performance. © 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 ICSID 2022 Organizers Keywords: Adhesive joints; structural adhesive; composite materials; cohesive zone models; aircraft fuselage 6th International Conference on Structural Integrity and Durability (ICSID 2022) Geometry effect on the static strength of curved composite bonded joints P.A.R. Ferreira a , R.D.S.G. Campilho a,b , I.J. Sánchez-Arce b,c *, D.C. Gonçalves b a ISEP, Instituto Superior de Engenharia do Porto, Rua Dr. António Bernardino de Almeida 431, Porto 4200-072, Portugal b INEGI, Instituto de Ciência e Inovação em Engenharia Mecânica e Engenharia Industrial, Rua Dr. Roberto Frias 400, Porto 4200-465, Portugal c UTAD, Universidade de Trás-os-Montes e Alto Douro, Quinta de Prados, Vila Real 5000-801, Portugal 6th International Conference on Structural Integrity and Durability (ICSID 2022) Geometry effect on the static strength of curved composite bonded joints P.A.R. Ferreira a , R.D.S.G. Campilho a,b , I.J. Sánchez-Arce b,c *, D.C. Gonçalves b a ISEP, Instituto Superior de Engenharia do Porto, Rua Dr. António Bernardino de Almeida 431, Porto 4200-072, Portugal b INEGI, Instituto de Ciência e Inovação em Engenharia Mecânica e Engenharia Industrial, Rua Dr. Roberto Frias 400, Porto 4200-465, Portugal c UTAD, Universidade de Trás-os-Montes e Alto Douro, Quinta de Prados, Vila Real 5000-801, Portugal

* Corresponding author. Tel.: +351-912-414-207. E-mail address: isidrodjsa@gmail.com * Corresponding author. Tel.: +351-912-414-207. E-mail address: isidrodjsa@gmail.com

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 ICSID 2022 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 ICSID 2022 Organizers

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