PSI - Issue 28

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

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

Procedia Structural Integrity 28 (2020) 1084–1093

© 2020 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 European Structural Integrity Society (ESIS) ExCo In this work, a robust meshless method, the Natural Neighbor Radial Point Interpolation Method (NNRPIM), was applied to the analysis of adhesive joints. First, experimental data of single-lap joints (SLJ) corresponding to four overlap lengths ( L O ) and a brittle adhesive were measured as a benchmark. Then, all the joint geometries were simulated utilizing the FEM and NNRPIM methodologies. The NNRPIM proved to be a good alternative to the FEM, providing similar strength prediction with differences less than 3% between them. Moreover, the stress distribution curves were compared, and differences of 6% in the peak shear stresses were found. In conclusion, the NNRPIM provides accurate results and could be utilized for further study of adhesively bonded joints. © 2020 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 European Structural Integrity Society (ESIS) ExCo Keywords: Natural Neighbour Radial Point Interpolation Method (NNRPIM); joint strength; meshless method; single-lap joint. Abstract Adhesive bonding is a widespread joining technique in the industry, namely aeronautical and automotive. However, the associated products ofte have compl x and non-standard shap s. Numerical modeling, such as that b sed on the f nite elem nt method (FEM), is commonly appli d for bonde joi t design, although ther are still lim tations linked o th method. Meshl ss methods (MM) are a viable ption to overcome some limitatio s of the FEM. However, these methods are still in development. In this w rk, a r bust meshless method, the Natural Neighb r Radial Point Interpolation Method (NNRPIM), was applied to the a aly is f adhesive joints. First, xperim ntal data of single-lap joints (SLJ) corresp ding t four overlap lengths ( L O ) and a brittle adhesive were mea ured as a b nchmark. Then, all th joint geometries wer simulated utilizing the FEM and NNRPIM me hodologies. The NNRPIM proved to be a good alternativ t the FEM, providing il r strength prediction with differences less than 3% betw en them. Moreover, the stress dist ibution curves were c mpared, and diff rences of 6% in the peak shear stresses were found. In conclusi n, the NNRPIM provides accurate results and coul be utilized for further study of adhesiv ly bonded joints. © 2020 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 European Structural Integrity Society (ESIS) ExC K ywords: Natural Neighbour Radial Point Interpolation Method (NNRPIM); joint strength; meshless method; single-lap joint. 1st Virtual European Conference on Fracture Analyzing single-lap joints bonded with a brittle adhesive by an elastic meshless method I.J. Sánchez-Arce a *, L.D.C. Ramalho a , R.D.S.G. Campilho a,b , J. Belinha a,b a Institute of Science and Innovation in Mechanical and Industrial Engineering, Rua Dr. Roberto Frias, 4200-465, Portugal b School of Engineering, Polytechnic of Porto, ISEP-IPP, Rua Dr. António Bernardino de Almeida, 431, 4200-072, Portugal Abstract Adhesive bonding is a widespread joining technique in the industry, namely aeronautical and automotive. However, the associated products often have complex and non-standard shapes. Numerical modeling, such as that based on the finite element method (FEM), is commonly applied for bonded joint design, although there are still limitations linked to the method. Meshless methods (MM) are a viable option to overcome some limitations of the FEM. However, these methods are still in development. 1st Virtual European Conference on Fracture Analyzing single-lap joints bonded with a brittle adhesive by an elastic meshless method I.J. Sánchez-Arce a *, L.D.C. Ramalho a , R.D.S.G. Campilho a,b , J. Belinha a,b a Institute of Science and Innovation in Mechanical and Industrial Engineering, Rua Dr. Roberto Frias, 4200-465, Portugal b School of Engineering, Polytechnic of Porto, ISEP-IPP, R a Dr. A tó io Bernardino de Almeida, 431, -072, rt l

* Corresponding author. Tel. +351-229-578-710. E-mail address: isidrodjsa@gmail.com * Corresponding author. Tel. +351-229-578-710. E-mail address: isidrodjsa@gmail.com

2452-3216 © 2020 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 European Structural Integrity Society (ESIS) ExCo 2452-3216 © 2020 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 u der responsibility of t European Structural Integrity Soci ty (ESIS) ExCo

2452-3216 © 2020 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 European Structural Integrity Society (ESIS) ExCo 10.1016/j.prostr.2020.11.123