PSI - Issue 47

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 47 (2023) 94–101

© 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 IGF27 chairpersons Abstract To be able to evaluate the performance and strength of an adhesive joint, numerical methodologies based on the Finite Element Method (FEM) are used. In real cases, adhesive joints are also subjected to dynamic loads, such as impact. Due to the scarcity of literature on the behaviour of adhesive joints under impact, its study has become relevant. This work aims to predict the behaviour and strength of double-lap composite adhesive joints under impact loads, under different overlap lengths ( L O ). Numerical simulations by FEM and cohesive zone models (CZM) are considered. The adhesives used for this numerical study are the Araldite ® AV138 and the Sikaforce ® 7752. As adherend, the pre-preg Seal ® Texipreg HS 160 RM was used. Initially, a study was carried out with single-lap joint (SLJ) experimental data, to validate the proposed technique. Double-lap joint (DLJ) analysis was based on elastic peel (  y ) and shear (  xy ) stresses, load-displacement ( P -  ) curve analysis, and strength prediction. Validation of the proposed numerical technique was successfully accomplished to model bonded joints under impact loads. © 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 IGF27 chairpersons Keywords: Adhesive joint; Double-lap joint; Composite material; Cohesive Zone Models; Impact loading. 1. Introduction Over the years, adhesive bonding has become increasingly relevant for material joining due to different advantages, which led for example to lightweight solutions for the aeronautic industry. Other features are the lower cost compared to other joining methods, and the efficient joining of different materials or materials with different thickness with 27th International Conference on Fracture and Structural Integrity (IGF27) Parametric analysis of double-lap composite adhesive joints under impact loads L.A.R. Gomes a , R.D.S.G. Campilho a,b, *, J.P.A. Valente a a ISEP – School of Engineering, Polytechnic of Porto, Rua Dr. António Bernardino de Almeida, 431, 4200-072 Porto, Portugal b INEGI – Pólo FEUP, Rua Dr. Roberto Frias, s/n, 4200-465 Porto, Portugal Abstract To be able to evaluate the performance and strength of an adhesive joint, numerical methodologies based on the Finite Element Method (FEM) are used. In real cases, adhesive joints are also subjected to dynamic loads, such as impact. Due to the scarcity of literature on the behaviour of adhesive joints under impact, its study has become relevant. This work aims to predict the behaviour and strength of double-lap composite adhesive joints under impact loads, under different overlap lengths ( L O ). Numerical simulations by FEM and cohesive zone models (CZM) are considered. The adhesives used for this numerical study are the Araldite ® AV138 and the Sikaforce ® 7752. As adherend, the pre-preg Seal ® Texipreg HS 160 RM was used. Initially, a study was carried out with single-lap joint (SLJ) experimental data, to validate the proposed technique. Double-lap joint (DLJ) analysis was based on elastic peel (  y ) and shear (  xy ) stresses, load-displacement ( P -  ) curve analysis, and strength prediction. Validation of the proposed numerical technique was successfully accomplished to model bonded joints under impact loads. © 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 IGF27 chairpersons Keywords: Adhesive joint; Double-lap joint; Composite material; Cohesive Zone Models; Impact loading. 1. Introduction Over the years, adhesive bonding has become increasingly relevant for material joining due to different advantages, which led for example to lightweight solutions for the aeronautic industry. Other features are the lower cost compared to other joining methods, and the efficient joining of different materials or materials with different thickness with 27th International Conference on Fracture and Structural Integrity (IGF27) Parametric analysis of double-lap composite adhesive joints under impact loads L.A.R. Gomes a , R.D.S.G. Campilho a,b, *, J.P.A. Valente a a ISEP – School of Engineering, Polytechnic of Porto, Rua Dr. António Bernardino de Almeida, 431, 4200-072 Porto, Portugal b INEGI – Pólo FEUP, Rua Dr. Roberto Frias, s/n, 4200-465 Porto, Portugal

* 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 © 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 IGF27 chairpersons 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 IGF27 chairpersons

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 IGF27 chairpersons 10.1016/j.prostr.2023.06.044