PSI - Issue 37

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

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Procedia Structural Integrity 37 (2022) 833–840

© 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 Pedro Miguel Guimaraes Pires Moreira © 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 Pedro Miguel Guimaraes Pires Mor ira Abstract Currently, for ecological and economic reasons, cellulosic fibres obtained from plants have enormous advantages for industrial applications. For example, the automotive sector suggests the use of composites reinforced with natural fibres due to their biodegradability, availability, low cost, and non-abrasive properties. However, due to the low resistance to localized impact loads, the use of composite materials is still a problem for many applications. In this context, sandwich composites can be a solution to overcome this problem, especially when they incorporate cork as a core. Cork has an alveolar structure, and it presents high specific strength and stiffness, near zero Poisson coefficient, high tolerance to the impact loads, impervious to liquid and gases, resistance to reactive agents and microorganisms, resistance to wear and fire, very low thermal conductivity, good acoustic insulation capacity and excellent damping characteristics. Therefore, this work intends to produce and characterize a novel bio-sandwich panel with a cork core and a laminate facing reinforced by date palm leaflets and using a green epoxy resin. The benefits of this new bio sandwich, in terms of impact strength, will be determined by comparison with a bio-composite laminate involving the same resin reinforced with date palm leaflets. It was possible to conclude that the cork core was responsible for lower impact loads and higher restored energy. © 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 Pedro Miguel Guimaraes Pires Moreira ICSI 2021 The 4th International Conference on Structural Integrity Impact characterization of bio-based sandwich panels with cork core P. Santos a, * , N. Bouhemame b, c , P.N.B. Reis d , A. Bezazi b a C-MAST, Department of Electromechanical Engineering, University of Beira Interior, Covilhã, Portugal b Laboratoire de Mécanique Appliquée des Nouveaux Matériaux (LMANM), Université 8 Mai 1945, Guelma, Algeria c Université Kasdi Merbah Ouargla, Route de Ghardaia, Algeria d Department of Mechanical Engineering, CEMMPRE, University of Coimbra, Coimbra, Portugal Abstract Currently, for ecological and economic reasons, cellulosic fibres obtained from plants have enormous advantages for industrial applications. For example, the automotive sector suggests the use of composites reinforced with natural fibres due to their biodegradability, availability, low cost, and non-abrasive properties. However, due to the low resistance to localized impact loads, the use of composite materials is still a problem for many applications. In this context, sandwich composites can be a solution to overcome this problem, especially when they incorporate cork as a core. Cork has an alveolar structure, and it presents high specific strength and stiffness, near zero Poisson coefficient, high tolerance to the impact loads, impervious to liquid and gases, resistance to reactive agents and microorganisms, resistance to wear and fire, very low thermal conductivity, good acoustic insulation capacity and excellent damping characteristics. Therefore, this work intends to produce and characterize a novel bio-sandwich panel with a cork core and a laminate facing reinforced by date palm leaflets and using a green epoxy resin. The benefits of this new bio sandwich, in terms of impact strength, will be determined by comparison with a bio-composite laminate involving the same resin reinforced with date palm leaflets. It was possible to conclude that the cork core was responsible for lower impact loads and higher restored energy. ICSI 2021 The 4th International Conference on Structural Integrity Impact characterization of bio-based sandwich panels with cork core P. Santos a, * , N. Bouhemame b, c , P.N.B. Reis d , A. Bezazi b a C-MAST, Department of Electromechanical Engineering, University of Beira Interior, Covilhã, Portugal b Laboratoire de Mécanique Appliquée des Nouveaux Matériaux (LMANM), Université 8 Mai 1945, Guelma, Algeria c Université Kasdi Merbah Ouargla, Route de Ghardaia, Algeria d Department of Mechanical Engineering, CEMMPRE, University of Coimbra, Coimbra, Portugal

Keywords: Mechanical properties; Impact strength; Sandwich panels; Cork. Keywords: Mechanical properties; Impact strength; Sandwich panels; Cork.

* Corresponding author. E-mail address: paulo.sergio.santos@ubi.pt * Corresponding author. E-mail address: paulo.sergio.santos@ubi.pt

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 Pedro Miguel Guimaraes Pires Moreira 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 Pedro Miguel Guimaraes Pires Moreira

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 Pedro Miguel Guimaraes Pires Moreira 10.1016/j.prostr.2022.02.016