PSI - Issue 41

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 Sci nceDire t Available online at www.sciencedirect.com ScienceDirect

www.elsevier.com/locate/procedia www.elsevier.com/locate/procedia

Procedia Structural Integrity 41 (2022) 14–23

© 2022 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 MedFract2Guest Editors. Abstract Adhesive bonding is a process of permanent bonding between the components of a structure that uses an adhesive to join the components after curing. Adhesive joints have increasingly been used in many applications. Thus, it is important to assess their behavior when subjected to static or impact loads. In this sense, cohesive zone models (CZM) have been used to predict the strength of adhesive joints and to simulate the growth of damage in structures after the definition of the cohesive laws. This work studies the different CZM conditions used to model an adhesive layer in a single-lap joint (SLJ) subjected to impact loading. The numerical results were validated using experimental data. In this study, four overlap lengths ( L O ) were considered. The evaluated modelling conditions were the decoupling of loading modes with triangular law, cohesive law shape, damage initiation criteria and damage propagation criterion. This analysis allowed to conclude that CZM is a reliable technique to predict the adhesive joint strength under impact. On the other hand, the numerical analysis made it possible to understand in detail the influence of the modelling conditions used in the cohesive models in the results. © 2022 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 MedFract2Guest Editors. Keywords: Structural adhesives; finite elements; numerical simulation; single-lap joints; cohesive zone models; impact. 1. Introduction Adhesive bonding is a process of permanent bonding between the components of a structure that uses an adhesive to join the components after curing. It is widely known from the literature that this joining technique is being Abstract Adhesive bonding is a process of permanent bonding between the components of a structure that uses an adhesive to join the compon nts after curing. Adhesive joints have increasingly b en used in many applica ions. Thus, it is important to assess their behavior when subjected to static or impact loads. In this sense, cohesive zone models (CZM) have been used t pr dic the strength of adhe ive joints and to simulate the growth of damage in structures aft r the definition of th cohesive laws. This work udies the diff rent CZM conditions sed o model an a hesive layer in a single-lap joint (SLJ) subjected to impact loading. The n m rical results were validated using experi ental data. In this study, four ov rl leng hs ( L O ) were considered. The evaluated mod lling conditions were th ecoupling of loading modes with triangular law, cohesive law shap , damage initiation criteria and damage propagation crit rion. This analysis allowed to conclude that CZM is a reliable tec nique to pr dic the adhesive joint stren th under impact. On the ot er hand, the num rical analysis made it possible to und rstand in detail the influ nce of th modelling conditions used in the cohesive models i the esults. © 2022 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 MedFract2Guest Editors. Keywords: Structural adhesives; finite elements; numerical simulation; single-lap joints; cohesive zone models; impact. 1. Introduction Adhesive bonding is a process of permanent bonding between the components of a structure that uses an adhesive to join the compo ents after curing. It is widely k own from literature that this joining technique is be ng 2nd Mediterranean Conference on Fracture and Structural Integrity Cohesive zone parameter influence on the impact strength of composite adhesive joints T.F.C. Pereira a , R.D.S.G. Campilho a,b, *, R.J.B. Rocha b , I.J. Sánchez-Arce b a ISEP – School of Engineering, Polythecnic 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 2nd Mediterranean Conference on Fracture and Structural Integrity Cohesive zone parameter influence on the impact strength of composite adhesive joints T.F.C. Pereira a , R.D.S.G. Campilho a,b, *, R.J.B. Rocha b , I.J. Sánchez-Arce b a ISEP – School of Engineering, Polythecnic 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

* Corresponding author. Tel: +351939526892; Fax: +351228321159. E-mail address: raulcampilho@gmail.com * Corresponding author. Tel: +351939526892; Fax: +351228321159. E-mail address: raulcampilho@gmail.com

2452-3216 © 2022 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 MedFract2Guest Editors. 2452-3216 © 2022 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 MedFract2Guest Editors.

2452-3216 © 2022 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 MedFract2Guest Editors. 10.1016/j.prostr.2022.05.004