PSI - Issue 41

Available online at www.sciencedirect.com Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2022) 000 – 000 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2022) 000 – 000

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ScienceDirect

Procedia Structural Integrity 41 (2022) 36–47

© 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 Tubular adhesive joints are widely employed when joining tubes and rods. The loads to which these joints are subjected may be axial or torsional. When loaded in the axial direction, cylindrical joints present stress concentrations in the adhesive layer, as is the case of lap joints. To improve the joint strength in the axial direction, the cross-section of the tubes can be chamfered to produce a scarf tubular joint. The geometrical variations produced by machining the chamfers increase the overall bonding area, leading to higher joint strength. This study aims to compare the tensile performance of tubular scarf joints (TSJ) with aluminium (AW6082-T651) adherends, considering the variation of the scarf angle (  ) from 45° to 3.43°; the joints were bonded with a moderately ductile adhesive, the Araldite ® 2015. Firstly, through the comparison of experimental tests and numerical analysis of tubular lap joints (TLJ), the cohesive zone model (CZM) technique and respective cohesive parameters were validated. A CZM analysis was then performed on the TSJ to analyse peel ( σ y ) and shear stresses ( τ xy ) in the adhesive layer. Damage and joint strength analyses were also carried out, as well as the study of the dissipated energy for the different joint configurations. The CZM technique was validated, and the numerical analysed showed a major  effect, with benefits for smaller  , and improved stress distributions over TLJ. 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: Adhesive joints; Tubular adhesive joints; Scarf joints; Finite element method; Cohesive zone models. Abstract Tubular adhesive joints are widely employed when joining tubes and rods. The loads to which these joints are subjected may be axial or torsional. When loaded in the axial direction, cylindrical joints present stress concentrations in the adhesive layer, as is the case of lap joints. To improve the joint strength in the axial direction, the cross-section of the tubes can be chamfered to produce a scarf tubular joint. The geometrical variations produced by machining the chamfers increase the overall bonding area, leading to higher joint strength. This study aims to compare the tensile performance of tubular scarf joints (TSJ) with aluminium (AW6082-T651) adherends, considering the variation of the scarf angle (  ) from 45° to 3.43°; the joints were bonded with a moderately ductile adhesive, the Araldite ® 2015. Firstly, through the comparison of experimental tests and numerical analysis of tubular lap joints (TLJ), the cohesive zone model (CZM) technique and respective cohesive parameters were validated. A CZM analysis was then performed on the TSJ to analyse peel ( σ y ) and shear stresses ( τ xy ) in the adhesive layer. Damage and joint strength analyses were also carried out, as well as the study of the dissipated energy for the different joint configurations. The CZM technique was validated, and the numerical analysed showed a major  effect, with benefits for smaller  , and improved stress distributions over TLJ. © 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: Adhesive joints; Tubular adhesive joints; Scarf joints; Finite element method; Cohesive zone models. 2nd Mediterranean Conference on Fracture and Structural Integrity Numerical evaluation of tensile-loaded tubular scarf adhesive joints J.E.S.M. Silva a , R.D.S.G. Campilho a,b *, I.J. Sánchez-Arce b , R.D.F. Moreira a a ISEP, Departamento de Engenharia Mecânica. Instituto Superior de Engenharia do Porto. Instituto Politécnico do Porto. Dr. António Bernardino de Almeida 431, Porto 4200-072, Portugal. b INEGI, Instituto de Ciência e Inovação em Engenharia Mecânica e Engenharia Industrial, Dr Roberto Frias 400. Porto, 4200-465, Portugal. 2nd Mediterranean Conference on Fracture and Structural Integrity u erical evaluation of tensile-loaded tubular scarf adhesive joints J.E.S.M. Silva a , R.D.S.G. Campilho a,b *, I.J. Sánchez-Arce b , R.D.F. Moreira a a ISEP, Departamento de Engenharia Mecânica. Instituto Superior de Engenharia do Porto. Instituto Politécnico do Porto. Dr. António Bernardino de Almeida 431, Porto 4200-072, Portugal. b INEGI, Instituto de Ciência e Inovação em Engenharia Mecânica e Engenharia Industrial, Dr Roberto Frias 400. Porto, 4200-465, Portugal.

* Corresponding author. Tel.: +351-939-526-892. E-mail address: raulcampilho@gmail.com * Corresponding author. Tel.: +351-939-526-892. 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.2022.05.006