In this paper, the aging resistance of sandwich structures made with cork agglomerate as core and flax-reinforced polymeric laminates as face sheets was investigated for the first time. In order to evaluate their durability in a hostile environment, a sandwich plate was manufactured by vacuum bagging technique and aged under salt-fog spray conditions, according to ASTM B 117 standard. The evolution of the sandwich mechanical properties during the aging exposition was analyzed by carrying out quasi-static flexural tests and Charpy impact tests both on unaged specimens and on specimens aged for 10, 25, and 60 days, respectively. The quasi-static experimental results showed that despite the salt-fog exposition leads to clear decrements in both maximum strength and modulus, the deformation capability of the sandwich structure evidences a noticeable improvement. According to this last result, it was found that the impact strength of the sandwich specimens was clearly increased after the salt-fog exposition evidencing that the studied green sandwich maintains good toughness properties in a hostile environment such as marine.

Fiore, V., Scalici, T., Valenza, A. (2019). Evaluation of aging behavior under salt-fog spray conditions of green sandwich structures. JOURNAL OF NATURAL FIBERS, 16(7), 977-986 [10.1080/15440478.2018.1444530].

Evaluation of aging behavior under salt-fog spray conditions of green sandwich structures

Fiore, Vincenzo;Scalici, Tommaso;Valenza, Antonino
2019-01-01

Abstract

In this paper, the aging resistance of sandwich structures made with cork agglomerate as core and flax-reinforced polymeric laminates as face sheets was investigated for the first time. In order to evaluate their durability in a hostile environment, a sandwich plate was manufactured by vacuum bagging technique and aged under salt-fog spray conditions, according to ASTM B 117 standard. The evolution of the sandwich mechanical properties during the aging exposition was analyzed by carrying out quasi-static flexural tests and Charpy impact tests both on unaged specimens and on specimens aged for 10, 25, and 60 days, respectively. The quasi-static experimental results showed that despite the salt-fog exposition leads to clear decrements in both maximum strength and modulus, the deformation capability of the sandwich structure evidences a noticeable improvement. According to this last result, it was found that the impact strength of the sandwich specimens was clearly increased after the salt-fog exposition evidencing that the studied green sandwich maintains good toughness properties in a hostile environment such as marine.
2019
Settore ING-IND/22 - Scienza E Tecnologia Dei Materiali
Settore ING-IND/02 - Costruzioni E Impianti Navali E Marini
Settore ING-IND/04 - Costruzioni E Strutture Aerospaziali
Settore ICAR/08 - Scienza Delle Costruzioni
Fiore, V., Scalici, T., Valenza, A. (2019). Evaluation of aging behavior under salt-fog spray conditions of green sandwich structures. JOURNAL OF NATURAL FIBERS, 16(7), 977-986 [10.1080/15440478.2018.1444530].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10447/279635
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