PSI - Issue 33

Available online at www.sciencedirect.com Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2019) 000–000

www.elsevier.com/locate/procedia

ScienceDirect

Procedia Structural Integrity 33 (2021) 149–158

© 2021 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 the IGF ExCo In this work, the Ogden hyper-elastic model was implemented into a MM, the Natural Neighbour Radial Point Interpolation Method (NNRPIM). The implementation was validated using literature data. The proposed methodology could be the basis for further application to adhesive joints bonded with flexible adhesives. © 2021 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 Statement: Peer-review under responsibility of the scientific committee of the IGF ExCo Keywords: Hyper-elastic material models; flexible adhesives; meshless methods; Ogden model; NNRPIM. by article under t IGF26 - 26th International Conference on Fracture and Structural Integrity Meshless and hyper-elastic implementation to analyse flexible adhesives I.J. Sánchez-Arce a *, D.C. Gonçalves a , L.D.C. Ramalho a , R.D.S.G. Campilho a,b , J. Belinha a,b a INEGI, Instituto de Ciência e Inovação em Engenharia Mecânica e Engenharia Industrial. Rua Dr. Roberto Frias 400. 4200-465. Porto Portugal. b ISEP, Departamento de Engenharia Mecânica. Instituto Politécnico de Porto. Rua Dr. Bernardino de Almeida 431. 4200-072. Porto Portugal. Abstract Structural adhesives and the joints involving them are often analysed using elastic and elastic-plastic material models. Nowadays, flexible adhesives are being used for structural applications. The material models used for structural adhesives are not always suitable for flexible adhesives. Hyper-elastic material models had been proven more suitable to model flexible adhesives. The Finite Element Method (FEM) is a well-accepted technique to model and analyse adhesive joints. Commercial FEM packages already have hyper-elastic capabilities, but not many applications to adhesive joints had been studied. Recently, Meshless Methods (MM) have also been brought into this field. Although the nature of MM made them attractive for the analysis of flexible adhesives and the joints bonded with them, no previous analyses had been reported. Several hyper-elastic models are available. One of them, the Ogden model, can represent several models through converting their parameters. Therefore, the Ogden model implementation is more versatile. a a . a a,b n a,b

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

2452-3216 © 2021 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 Statement: Peer-review under responsibility of the scientific committee of the IGF ExCo

2452-3216 © 2021 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 the IGF ExCo 10.1016/j.prostr.2021.10.019