PSI - Issue 53

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

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

ScienceDirect

Procedia Structural Integrity 53 (2024) 338–351

© 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 scientific committee of the ESIAM23 chairpersons © 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 scientific committee of the ESIAM23 chairpersons Abstract The use of advanced composite materials is becoming more and more frequent in structures that support great effort due to having a higher specific stiffness, which allows for reducing the weight of structures. The manufacturing methods associated with this type of material mean that the reinforcement element, the fibre, has its integrity easily reached with the occurrence of small impacts. The present study aimed to obtain a numerical evaluation of the performance of carbon fibre-reinforced polymer (CFRP) tubular profiles subjected to transverse low-speed impact, using FEM (Finite Element Method) code based. The crucial point of the study was to promote various impact tests with different energy levels and correlate with the strain results, defining for the purpose tube, the energy limit that produces residual deformation. Laminated composite tubes subjected to low-velocity impacts could suffer permanent deformation even when it is not eye-visible. Some of these invisible damages could promote a crack initiation in tube layup, reducing the fatigue life of specimens. This study allowed to obtain a classification of the structural integrity of a composite tube under gradient low-speed impact tests, which represents a piece of important information to establish a parallelism between the residual strength and fatigue life in experimental testing. © 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 scientific committee of the ESIAM23 chairpersons Third European Conference on the Structural Integrity of Additively Manufactured Materials (ESIAM23) Numerical evaluation of damage in laminated composite tubes under low-speed impacts A. Neto a , S. Santos a,b *, M. L. Alves a,c a School of Technology and Management, Polytechnic of Leiria, 2411-901 Leiria, Portugal; b CEMMPRE - Centre for Mechanical Engineering, Materials and Processes, Rua Luís Reis Santos, Pinhal de Marrocos, 3030-788 Coimbra, Portugal; c INESC Coimbra - Institute for Systems Engineering and Computers at Coimbra, Instituto Politécnico de Leiria, Portugal. Abstract The use of advanced composite materials is becoming more and more frequent in structures that support great effort due to having a higher specific stiffness, which allows for reducing the weight of structures. The manufacturing methods associated with this type of material mean that the reinforcement element, the fibre, has its integrity easily reached with the occurrence of small impacts. The present study aimed to obtain a numerical evaluation of the performance of carbon fibre-reinforced polymer (CFRP) tubular profiles subjected to transverse low-speed impact, using FEM (Finite Element Method) code based. The crucial point of the study was to promote various impact tests with different energy levels and correlate with the strain results, defining for the purpose tube, the energy limit that produces residual deformation. Laminated composite tubes subjected to low-velocity impacts could suffer permanent deformation even when it is not eye-visible. Some of these invisible damages could promote a crack initiation in tube layup, reducing the fatigue life of specimens. This study allowed to obtain a classification of the structural integrity of a composite tube under gradient low-speed impact tests, which represents a piece of important information to establish a parallelism between the residual strength and fatigue life in experimental testing. Third European Conference on the Structural Integrity of Additively Manufactured Materials (ESIAM23) Numerical evaluation of damage in laminated composite tubes under low-speed impacts A. Neto a , S. Santos a,b *, M. L. Alves a,c a School of Technology and Management, Polytechnic of Leiria, 2411-901 Leiria, Portugal; b CEMMPRE - Centre for Mechanical Engineering, Materials and Processes, Rua Luís Reis Santos, Pinhal de Marrocos, 3030-788 Coimbra, Portugal; c INESC Coimbra - Institute for Systems Engineering and Computers at Coimbra, Instituto Politécnico de Leiria, Portugal.

Keywords: Composites; Low-velocity Impact; Carbon Fibre Tubes; LS-DYNA; Layups. Keywords: Composites; Low-velocity Impact; Carbon Fibre Tubes; LS-DYNA; Layups.

* Corresponding author. Tel.: +351 911 836 225. E-mail address: ssantos@ipleiria.pt * Corresponding author. Tel.: +351 911 836 225. E-mail address: ssantos@ipleiria.pt

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 scientific committee of the ESIAM23 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 scientific committee of the ESIAM23 chairpersons

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