PSI - Issue 72

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ScienceDirect

Procedia Structural Integrity 72 (2025) 43–51

Keywords: Adhesive joints; Dual-adhesive joint; Impact loading; Cohesive zone models 1. Introduction The advantages of adhesive joints include low weight, excellent strength, and reliability, as well as the ability to bond dissimilar materials and provide a more uniform stress distribution. Despite these benefits, adhesive joints are not designed to be disassembled and often function within limited environmental conditions, with temperature being one of the most influential factors (Akkasali et al. 2024). Numerical tools such as the Finite Element Method (FEM) are invaluable in analyzing adhesive joint performance without the immediate need for physical testing. CZM are Abstract Dual-adhesive joints are a joining option that consists of combining a flexible and a stiff adhesive, to improve stress distributions and joint strength. This work investigates the impact behavior of dual-adhesive single-lap joints (DSLJ) with steel adherends. It is possible to increase the impact performance of adhesive joints without making complex design changes, with the variation of geometry parameters and adhesive combinations. Impact-loaded DSLJ were analyzed by cohesive zone models (CZM). Initially, the numerical model was successfully validated with experimental data. In the numerical study, it was possible to obtain significant impact strength improvements by the dual joining technique and the optimal joint geometry was proposed. © 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 Aleksandar Sedmak, Branislav Djordjevic, Simon Sedmak Dr. Simon Sedmak, ssedmak@mas.bg.ac.rs, Innovation Center of Faculty of Mechanical Engineering, Belgrade, Serbia 12th Annual Conference of Society for Structural Integrity and Life (DIVK12) Numerical evaluation of dual-adhesive joints subjected to impact L.A.S. Maia a , R.D.S.G. Campilho a,b, *, R.D.F. Moreira a , K. Madani c , A. Houari c , M.A. Bellali c a CIDEM, ISEP-School of Engineering, R. Dr. António Bernardino de Almeida, 431, 4200-072 Porto, Portugal. b INEGI – Pólo FEUP, Rua Dr. Roberto Frias, 400, 4200-465 Porto, Portugal. c Department of Mechanical Engineering, University of Sidi Bel Abbes, BP 89, Cité Ben M’hidi, 2200 0, Sidi Bel Abbes, Algeria.

* Corresponding author. Tel.: +351939526892; fax: +351228321159. E-mail address: raulcampilho@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 Aleksandar Sedmak, Branislav Djordjevic, Simon Sedmak Dr. Simon Sedmak, ssedmak@mas.bg.ac.rs, Innovation Center of Faculty of Mechanical Engineering, Belgrade, Serbia 10.1016/j.prostr.2025.08.072