Sandwich structures are widespread in all the industrial applications where a high stiffness-to-weight ratio is required. Despite the unique bending performance, they feature two major drawbacks: the massive exploitation of synthetic materials and a strong susceptibility to impact damage. This work addresses both problems, investigating the puncture impact response of bio-based sandwich structures with an agglomerated cork core and intraply flax/basalt hybrid skins. A preliminary campaign of impacts was performed on three agglomerated corks with different densities and on three traditional polyvinyl(chloride) foams with comparable densities. Based upon the results obtained, one agglomerated cork (NL25) and one PVC foam (HP130) were selected to realize a finite element analysis (FEA) on the sole core and to produce the whole sandwich composites. FEA results show a good agreement with experimental ones ensuring a reliable prediction of cores dynamic response. The tests performed on sandwich structures proved the feasibility of agglomerated cork as an effective core, able to provide an improved damage tolerance to the structure. NL25 sandwiches impacted at 20–30 J showed a permanent indentation 60–67% lower than HP130 ones. The coupling agent in skins has a detrimental effect reducing composites perforation threshold from 80 to 60 J.

Experimental and finite element analysis of the impact response of agglomerated cork and its intraply hybrid flax/basalt sandwich structures / Sergi, Claudia; Boria, Simonetta; Sarasini, Fabrizio; Russo, Pietro; Vitiello, Libera; Barbero, Enrique; Sanchez-Saez, Sonia; Tirillo', Jacopo. - In: COMPOSITE STRUCTURES. - ISSN 0263-8223. - 272:(2021). [10.1016/j.compstruct.2021.114210]

Experimental and finite element analysis of the impact response of agglomerated cork and its intraply hybrid flax/basalt sandwich structures

Sergi, Claudia
;
Sarasini, Fabrizio;Tirillo', Jacopo
2021

Abstract

Sandwich structures are widespread in all the industrial applications where a high stiffness-to-weight ratio is required. Despite the unique bending performance, they feature two major drawbacks: the massive exploitation of synthetic materials and a strong susceptibility to impact damage. This work addresses both problems, investigating the puncture impact response of bio-based sandwich structures with an agglomerated cork core and intraply flax/basalt hybrid skins. A preliminary campaign of impacts was performed on three agglomerated corks with different densities and on three traditional polyvinyl(chloride) foams with comparable densities. Based upon the results obtained, one agglomerated cork (NL25) and one PVC foam (HP130) were selected to realize a finite element analysis (FEA) on the sole core and to produce the whole sandwich composites. FEA results show a good agreement with experimental ones ensuring a reliable prediction of cores dynamic response. The tests performed on sandwich structures proved the feasibility of agglomerated cork as an effective core, able to provide an improved damage tolerance to the structure. NL25 sandwiches impacted at 20–30 J showed a permanent indentation 60–67% lower than HP130 ones. The coupling agent in skins has a detrimental effect reducing composites perforation threshold from 80 to 60 J.
2021
agglomerated cork; finite element analysis; hybrid composite; impact test; PVC foam
01 Pubblicazione su rivista::01a Articolo in rivista
Experimental and finite element analysis of the impact response of agglomerated cork and its intraply hybrid flax/basalt sandwich structures / Sergi, Claudia; Boria, Simonetta; Sarasini, Fabrizio; Russo, Pietro; Vitiello, Libera; Barbero, Enrique; Sanchez-Saez, Sonia; Tirillo', Jacopo. - In: COMPOSITE STRUCTURES. - ISSN 0263-8223. - 272:(2021). [10.1016/j.compstruct.2021.114210]
File allegati a questo prodotto
File Dimensione Formato  
Sergi_Experimental-finite-element_2021.pdf

solo gestori archivio

Tipologia: Versione editoriale (versione pubblicata con il layout dell'editore)
Licenza: Tutti i diritti riservati (All rights reserved)
Dimensione 6.7 MB
Formato Adobe PDF
6.7 MB Adobe PDF   Contatta l'autore

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1553640
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 6
  • ???jsp.display-item.citation.isi??? 5
social impact