PSI - Issue 80

Available online at www.sciencedirect.com Structural Integrity Procedia 00 (2022) 000–000 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2022) 000–000 Available online at www.sciencedirect.com ScienceDirect

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Procedia Structural Integrity 80 (2026) 443–450

© 2025 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 Ferri Aliabadi © 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 Professor Ferri Aliabadi Abstract Leading construction, automotive, and aircraft industries rely on structural adhesive joints to provide strong lightweight structures. Adhesive joints allow the joining of dissimilar materials, and uniformly distribute stress, thus reducing stress concentrations, and providing high fatigue durability within dynamic conditions and corrosive environments. The numerical simulation of adhesively bonded components is compromised by the intricate stress fields within the adhesive layer and its interfaces. Furthermore, the development of high convergent techniques is highly motivated, due to the dense nodal discretization required in such delicate regions. In recent years, meshless methods have been applied to adhesive joint simulation, demonstrating interesting results in the strength prediction of bonded joints subjected to fracture propagation. In this work, the natural neighbours radial point interpolation method (NNRPIM) is implemented to predict crack propagation in adhesively bonded joint specimens. In opposition to conventional meshless techniques, the NNRPIM uniquely relies on the nodal discretization to construct the integration points based on the Voronoi diagram and Delaunay triangulation. Geometric crack propagation is explicit, and not hindered by the remeshing of local fixed elements, as in finite element methods. Numerical results demonstrate the suitability of the proposed NNRPIM-based crack propagation algorithm to simulate fracture propagation in adhesively bonded joints. © 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 Professor Ferri Aliabadi Fracture, Damage and Structural Health Monitoring Simulation of fracture propagation in adhesive joints using the natural neighbours radial point interpolation method D. C. Gonçalves a,* , L. D. C. Ramalho a , R. D. S. G. Campilho a,b , J. Belinha a,b a INEGI, Institute of Mechanical Engineering, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal b School of Engineering, Polytechnic of Porto, ISEP-IPP, Rua Dr. António Bernardino de Almeida, 431, 4200-072, Porto, Portugal Abstract Leading construction, automotive, and aircraft industries rely on structural adhesive joints to provide strong lightweight structures. Adhesive joints allow the joining of dissimilar materials, and uniformly distribute stress, thus reducing stress concentrations, and providing high fatigue durability within dynamic conditions and corrosive environments. The numerical simulation of adhesively bonded components is compromised by the intricate stress fields within the adhesive layer and its interfaces. Furthermore, the development of high convergent techniques is highly motivated, due to the dense nodal discretization required in such delicate regions. In recent years, meshless methods have been applied to adhesive joint simulation, demonstrating interesting results in the strength prediction of bonded joints subjected to fracture propagation. In this work, the natural neighbours radial point interpolation method (NNRPIM) is implemented to predict crack propagation in adhesively bonded joint specimens. In opposition to conventional meshless techniques, the NNRPIM uniquely relies on the nodal discretization to construct the integration points based on the Voronoi diagram and Delaunay triangulation. Geometric crack propagation is explicit, and not hindered by the remeshing of local fixed elements, as in finite element methods. Numerical results demonstrate the suitability of the proposed NNRPIM-based crack propagation algorithm to simulate fracture propagation in adhesively bonded joints. Fracture, Damage and Structural Health Monitoring Simulation of fracture propagation in adhesive joints using the natural neighbours radial point interpolation method D. C. Gonçalves a,* , L. D. C. Ramalho a , R. D. S. G. Campilho a,b , J. Belinha a,b a INEGI, Institute of Mechanical Engineering, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal b School of Engineering, Polytechnic of Porto, ISEP-IPP, Rua Dr. António Bernardino de Almeida, 431, 4200-072, Porto, Portugal

Keywords: Adhesuve Joints; Fracture; Natural Neighbours; Radial Point Interpolation Keywords: Adhesuve Joints; Fracture; Natural Neighbours; Radial Point Interpolation

* Corresponding author. Tel.: +351918959155. E-mail address: costa.goncalves.diogo@gmail.com * Corresponding author. Tel.: +351918959155. E-mail address: costa.goncalves.diogo@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 Professor Ferri Aliabadi 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 Professor Ferri Aliabadi

2452-3216 © 2025 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 Ferri Aliabadi 10.1016/j.prostr.2026.02.043