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Moisture Uptake Effect on Bending and Damping Properties of Composite Sandwich

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Abstract:

In this paper, the effects of seawater exposure on the bending and damping properties of fibre-reinforced sandwich structures were investigated experimentally and analytically using the residual property model (RPM). Glass fiber reinforced plastics facesheets with PVC foam core, exposed to seawater exposure until saturation was subjected to flexural and dynamic mechanical analysis tests. Key mechanical properties were used to develop an analytical residual property model. Results indicated that after exposure, while the flexural strength and modulus reduced by 20% and 19% respectively, the storage, loss moduli and tan delta increased by 7%, 20% and 12% respectively. Furthermore, the accuracy of property degradation was demonstrated for the predicted properties, thereby establishing the suitability of RPM as a cost-effective means for material property determination.

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Periodical:

Materials Science Forum (Volume 1181)

Pages:

87-95

DOI:

https://doi.org/10.4028/p-DU2ko5

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Online since:

March 2026

Authors:

Norman Osa-Uwagbue*, Sunday Atomode, Francis Anyebe Oteikwu, Osezua Ejodame, Amadi Gabriel Udu

Keywords:

Analytical Model, Composite Sandwich, Mechanical Properties, Seawater Exposure

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© 2026 Trans Tech Publications Ltd. All Rights Reserved

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