Impact Response of Composite Sandwich Cylindrical Shells

Nowadays, due to the complexity and design of many advanced structures, cylindrical shells are starting to have numerous applications. Therefore, the main goal of this work is to study the effect of thickness and the benefits of a carbon composite sandwich cylindrical shell incorporating a cork core...

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Autores principales:	Paulo N. B. Reis, Carlos A. C. P. Coelho, Fábio V. P. Navalho
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	composite sandwich cylindrical shells low-velocity impact experimental testing Technology T Engineering (General). Civil engineering (General) TA1-2040 Biology (General) QH301-705.5 Physics QC1-999 Chemistry QD1-999
Acceso en línea:	https://doaj.org/article/0811274004fe4553afbe971e66078106
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spelling	oai:doaj.org-article:0811274004fe4553afbe971e660781062021-11-25T16:41:47ZImpact Response of Composite Sandwich Cylindrical Shells10.3390/app1122109582076-3417https://doaj.org/article/0811274004fe4553afbe971e660781062021-11-01T00:00:00Zhttps://www.mdpi.com/2076-3417/11/22/10958https://doaj.org/toc/2076-3417Nowadays, due to the complexity and design of many advanced structures, cylindrical shells are starting to have numerous applications. Therefore, the main goal of this work is to study the effect of thickness and the benefits of a carbon composite sandwich cylindrical shell incorporating a cork core, compared to a conventional carbon composite cylindrical shell, in terms of the static and impact performances. For this purpose, static and impact tests were carried out with the samples freely supported on curved edges, while straight edges were bi-supported. A significant effect of the thickness on static properties and impact performance was observed. Compared to thinner shells, the failure load on the static tests increased by 237.9% and stiffness by 217.2% for thicker shells, while the restored energy obtained from the impact tests abruptly increased due to the collapse that occurred for the thinner ones. Regarding the sandwich shells, the incorporation of a cork core proved to be beneficial because it promoted an increase in the restored energy of around 44.8% relative to the conventional composite shell. Finally, when a carbon skin is replaced by a Kevlar one (hybridization effect), an improvement in the restored energy of about 20.8% was found. Therefore, it is possible to conclude that numerous industrial applications can benefit from cylindrical sandwiches incorporating cork, and their hybridization with Kevlar fibres should be especially considered when they are subject to impact loads. This optimized lay-up is suggested because Kevlar fibres fail through a series of small fibril failures, while carbon fibres exhibit a brittle collapse.Paulo N. B. ReisCarlos A. C. P. CoelhoFábio V. P. NavalhoMDPI AGarticlecomposite sandwich cylindrical shellslow-velocity impactexperimental testingTechnologyTEngineering (General). Civil engineering (General)TA1-2040Biology (General)QH301-705.5PhysicsQC1-999ChemistryQD1-999ENApplied Sciences, Vol 11, Iss 10958, p 10958 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	composite sandwich cylindrical shells low-velocity impact experimental testing Technology T Engineering (General). Civil engineering (General) TA1-2040 Biology (General) QH301-705.5 Physics QC1-999 Chemistry QD1-999
spellingShingle	composite sandwich cylindrical shells low-velocity impact experimental testing Technology T Engineering (General). Civil engineering (General) TA1-2040 Biology (General) QH301-705.5 Physics QC1-999 Chemistry QD1-999 Paulo N. B. Reis Carlos A. C. P. Coelho Fábio V. P. Navalho Impact Response of Composite Sandwich Cylindrical Shells
description	Nowadays, due to the complexity and design of many advanced structures, cylindrical shells are starting to have numerous applications. Therefore, the main goal of this work is to study the effect of thickness and the benefits of a carbon composite sandwich cylindrical shell incorporating a cork core, compared to a conventional carbon composite cylindrical shell, in terms of the static and impact performances. For this purpose, static and impact tests were carried out with the samples freely supported on curved edges, while straight edges were bi-supported. A significant effect of the thickness on static properties and impact performance was observed. Compared to thinner shells, the failure load on the static tests increased by 237.9% and stiffness by 217.2% for thicker shells, while the restored energy obtained from the impact tests abruptly increased due to the collapse that occurred for the thinner ones. Regarding the sandwich shells, the incorporation of a cork core proved to be beneficial because it promoted an increase in the restored energy of around 44.8% relative to the conventional composite shell. Finally, when a carbon skin is replaced by a Kevlar one (hybridization effect), an improvement in the restored energy of about 20.8% was found. Therefore, it is possible to conclude that numerous industrial applications can benefit from cylindrical sandwiches incorporating cork, and their hybridization with Kevlar fibres should be especially considered when they are subject to impact loads. This optimized lay-up is suggested because Kevlar fibres fail through a series of small fibril failures, while carbon fibres exhibit a brittle collapse.
format	article
author	Paulo N. B. Reis Carlos A. C. P. Coelho Fábio V. P. Navalho
author_facet	Paulo N. B. Reis Carlos A. C. P. Coelho Fábio V. P. Navalho
author_sort	Paulo N. B. Reis
title	Impact Response of Composite Sandwich Cylindrical Shells
title_short	Impact Response of Composite Sandwich Cylindrical Shells
title_full	Impact Response of Composite Sandwich Cylindrical Shells
title_fullStr	Impact Response of Composite Sandwich Cylindrical Shells
title_full_unstemmed	Impact Response of Composite Sandwich Cylindrical Shells
title_sort	impact response of composite sandwich cylindrical shells
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/0811274004fe4553afbe971e66078106
work_keys_str_mv	AT paulonbreis impactresponseofcompositesandwichcylindricalshells AT carlosacpcoelho impactresponseofcompositesandwichcylindricalshells AT fabiovpnavalho impactresponseofcompositesandwichcylindricalshells
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Impact Response of Composite Sandwich Cylindrical Shells

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