PSI - Issue 61

ScienceDirect Structural Integrity Procedia 00 (2023) 000 – 000 Structural Integrity Procedia 00 (2023) 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 61 (2024) 71–78

© 2024 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 IWPDF 2023 Chairman Abstract Scarf adhesive joints, characterized by an end-to-end connection between tapered adherents at a given scarf angle (  ), are applicable in structural applications, e.g., fiber-reinforced structures, owing to their efficiency. This work presents an analysis on the tensile strength of scarf adhesive joints, considering  and the adhesive type as design parameters. A detailed numerical evaluation is presented, based on the eXtended Finite Element Method (XFEM), following the technique validation with experimental data, for adhesives with different characteristics. The XFEM technique was tested with varying damage initiation and propagation criteria. The XFEM technique was positively validated for specific damage initiation and propagation criteria. © 2024 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 IWPDF 2023 Keywords: Adhesive joint; Structural adhesives; Scarf joint; Cohesive zone models; eXtended finite element method. 1. Introduction There are several possible designs for adhesive joints, aiming at increasing overall joint strength by providing better stress distribution and decreasing the peeling effect at the adhesive layer’s edges. Scarf geometries are defined 3rd International Workshop on Plasticity, Damage and Fracture of Engineering Materials (IWPDF 2023) Study of different initiation and propagation criteria in the XFEM modelling of scarf adhesive joints G.J.C. Pinheiro a , I.R.S. Araújo a , R.D.S.G. Campilho a,b, *, J.P.A. Valente a , M.J.R. Queirós a , K Madani c a ISEP – School of Engineering, Polytechnic of Porto, 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, Sidi Bel Abbes 22000, Algeria. Abstract Scarf adhesive joints, characterized by an end-to-end connection between tapered adherents at a given scarf angle (  ), are applicable in structural applications, e.g., fiber-reinforced structures, owing to their efficiency. This work presents an analysis on the tensile strength of scarf adhesive joints, considering  and the adhesive type as design parameters. A detailed numerical evaluation is presented, based on the eXtended Finite Element Method (XFEM), following the technique validation with experimental data, for adhesives with different characteristics. The XFEM technique was tested with varying damage initiation and propagation criteria. The XFEM technique was positively validated for specific damage initiation and propagation criteria. © 2024 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 IWPDF 2023 Keywords: Adhesive joint; Structural adhesives; Scarf joint; Cohesive zone models; eXtended finite element method. 1. Introduction There are several possible designs for adhesive joints, aiming at increasing overall joint strength by providing better stress distribution and decreasing the peeling effect at the adhesive layer’s edges. Scarf geometries are defined 3rd International Workshop on Plasticity, Damage and Fracture of Engineering Materials (IWPDF 2023) Study of different initiation and propagation criteria in the XFEM modelling of scarf adhesive joints G.J.C. Pinheiro a , I.R.S. Araújo a , R.D.S.G. Campilho a,b, *, J.P.A. Valente a , M.J.R. Queirós a , K Madani c a ISEP – School of Engineering, Polytechnic of Porto, 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, Sidi Bel Abbes 22000, Algeria.

* Corresponding author. Tel.: +351 939526892; fax: +351 228321159. E-mail address: raulcampilho@gmail.com. * Corresponding author. Tel.: +351 939526892; fax: +351 228321159. E-mail address: raulcampilho@gmail.com.

2452-3216 © 2024 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 IWPDF 2023 2452-3216 © 2024 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 IWPDF 2023

2452-3216 © 2024 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 IWPDF 2023 Chairman 10.1016/j.prostr.2024.06.011