Curing and seawater aging effects on mechanical and physical properties of glass/epoxy filament wound cylinders

Marcelo B. Antunes; José Humberto S. Almeida; Sandro C. Amico

doi:10.1016/j.coco.2020.100517

Curing and seawater aging effects on mechanical and physical properties of glass/epoxy filament wound cylinders

Marcelo B. Antunes, José Humberto S. Almeida^*, Sandro C. Amico

^*Corresponding author for this work

Department of Mechanical Engineering

Universidade Federal do Rio Grande do Sul

Research output: Contribution to journal › Article › Scientific › peer-review

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Abstract

Polymer composites in marine structures that operate under seawater environment may be seriously affected, reducing durability estimates. This work aims at evaluating the effect of seawater exposure at 80 °C for 7–28 days on filament-wound glass fiber/epoxy composite cylinders partially cured by passing saturated steam through them just after winding seeking a faster curing route. The winding angle is varied (±55, ±65 and ± 75) and some of the cylinders are later post-cured for comparison. The unaged partially cured specimens do not reach complete curing, with a glass transition temperature (T_g) of 132 °C, below the T_g for the other samples (154–159 °C). Fully cured cylinders present mechanical properties slightly higher than partially cured ones. Moreover, aging in seawater for 7 days enhances the cross-linking degree of epoxy, with a positive effect on both hoop tensile strength and stiffness. Aging is, however, not critical for the radial compressive properties.

Original language	English
Article number	100517
Pages (from-to)	1
Number of pages	6
Journal	Composites Communications
Volume	22
DOIs	https://doi.org/10.1016/j.coco.2020.100517
Publication status	Published - 1 Dec 2020
MoE publication type	A1 Journal article-refereed

Keywords

Aging
Composite cylinder
Filament winding
GFRP composites

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ENG_Antunes_et_al_Curing_and_Seawater_Aging_Effects_Composites_CommunicationsAccepted author manuscript, 293 KBLicence: CC BY-NC-ND

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title = "Curing and seawater aging effects on mechanical and physical properties of glass/epoxy filament wound cylinders",

abstract = "Polymer composites in marine structures that operate under seawater environment may be seriously affected, reducing durability estimates. This work aims at evaluating the effect of seawater exposure at 80 °C for 7–28 days on filament-wound glass fiber/epoxy composite cylinders partially cured by passing saturated steam through them just after winding seeking a faster curing route. The winding angle is varied (±55, ±65 and ± 75) and some of the cylinders are later post-cured for comparison. The unaged partially cured specimens do not reach complete curing, with a glass transition temperature (Tg) of 132 °C, below the Tg for the other samples (154–159 °C). Fully cured cylinders present mechanical properties slightly higher than partially cured ones. Moreover, aging in seawater for 7 days enhances the cross-linking degree of epoxy, with a positive effect on both hoop tensile strength and stiffness. Aging is, however, not critical for the radial compressive properties.",

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Y1 - 2020/12/1

N2 - Polymer composites in marine structures that operate under seawater environment may be seriously affected, reducing durability estimates. This work aims at evaluating the effect of seawater exposure at 80 °C for 7–28 days on filament-wound glass fiber/epoxy composite cylinders partially cured by passing saturated steam through them just after winding seeking a faster curing route. The winding angle is varied (±55, ±65 and ± 75) and some of the cylinders are later post-cured for comparison. The unaged partially cured specimens do not reach complete curing, with a glass transition temperature (Tg) of 132 °C, below the Tg for the other samples (154–159 °C). Fully cured cylinders present mechanical properties slightly higher than partially cured ones. Moreover, aging in seawater for 7 days enhances the cross-linking degree of epoxy, with a positive effect on both hoop tensile strength and stiffness. Aging is, however, not critical for the radial compressive properties.

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Curing and seawater aging effects on mechanical and physical properties of glass/epoxy filament wound cylinders

Abstract

Keywords

UN SDGs

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