PSI - Issue 77

ScienceDirect Structural Integrity Procedia 00 (2026) 000 – 000 Structural Integrity Procedia 00 (2026) 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 77 (2026) 79–86

© 2026 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 ICSI organizers Abstract Structural adhesive bonding is a widely used technology in leading automotive and aircraft industries. A significant part of the production process of safe and optimized adhesively bonded components is the accurate and efficient computational simulation of these parts. In recent years, the numerical analysis is gaining expanded interest, along with the improvement of computer capability, and the development of innovative numerical techniques, such as meshless methods. In this work, we present the results of the application of a meshless technique to predict fracture propagation in adhesive joints subjected to mode I and mode II loading. The previous determination of pure mode I and mode II parameters can then be considered in future applications to implement mixed mode energy criteria in complex applications of adhesive joints. Hence, Double Cantilever Beam (DCB) and End-Notched Flexure (ENF) tests were performed experimentally to compare and assess the numerical accuracy of the proposed fracture propagation algorithm. The results demonstrate the accuracy of the meshless method to analyze fracture in adhesive joints during the complete cohesive crack propagation process. © 2026 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 ICSI organizers Keywords: Adhesive Joints, Meshless Method, Fracture Propagation. 1. Introduction Meshless methods are discretization techniques capable of solving problems governed by partial differential equations. Especially solid mechanics problems are usually analyzed by resorting to classic finite element methods International Conference on Structural Integrity Meshless analysis of pure mode I and mode II fracture propagation in adhesively bonded joints 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 b School of Engineering, Polytechnic of Porto, ISEP-IPP, Rua Dr. António Bernardino de Almeida, 431, 4200-072, Porto, Portugal Abstract Structural adhesive bonding is a widely used technology in leading automotive and aircraft industries. A significant part of the production process of safe and optimized adhesively bonded components is the accurate and efficient computational simulation of these parts. In recent years, the numerical analysis is gaining expanded interest, along with the improvement of computer capability, and the development of innovative numerical techniques, such as meshless methods. In this work, we present the results of the application of a meshless technique to predict fracture propagation in adhesive joints subjected to mode I and mode II loading. The previous determination of pure mode I and mode II parameters can then be considered in future applications to implement mixed mode energy criteria in complex applications of adhesive joints. Hence, Double Cantilever Beam (DCB) and End-Notched Flexure (ENF) tests were performed experimentally to compare and assess the numerical accuracy of the proposed fracture propagation algorithm. The results demonstrate the accuracy of the meshless method to analyze fracture in adhesive joints during the complete cohesive crack propagation process. © 2026 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 ICSI organizers Keywords: Adhesive Joints, Meshless Method, Fracture Propagation. 1. Introduction Meshless methods are discretization techniques capable of solving problems governed by partial differential equations. Especially solid mechanics problems are usually analyzed by resorting to classic finite element methods International Conference on Structural Integrity Meshless analysis of pure mode I and mode II fracture propagation in adhesively bonded joints 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 b School of Engineering, Polytechnic of Porto, ISEP-IPP, Rua Dr. António Bernardino de Almeida, 431, 4200-072, Porto, Portugal

* Corresponding author. Tel.: +351 918959155. E-mail address: costa.goncalves.diogo@gmail.com * Corresponding author. Tel.: +351 918959155. E-mail address: costa.goncalves.diogo@gmail.com

2452-3216 © 2026 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 ICSI organizers 2452-3216 © 2026 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 ICSI organizers

2452-3216 © 2026 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 ICSI organizers 10.1016/j.prostr.2026.01.012