Viscoelastic characteristics of carbon fiber-reinforced epoxy filament wound laminates

Heitor L. Ornaghi Jr; Roberta M. Neves; Francisco M. Monticeli; Jose Humberto S. Almeida Jr

doi:10.1016/j.coco.2020.100418

Viscoelastic characteristics of carbon fiber-reinforced epoxy filament wound laminates

Heitor L. Ornaghi Jr, Roberta M. Neves, Francisco M. Monticeli, Jose Humberto S. Almeida Jr^*

^*Corresponding author for this work

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

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Abstract

The mechanical properties of fiber-reinforced composites are time-dependent due to the viscoelastic nature of polymers. This study covers the creep/recovery and dynamic mechanical properties of high-performance composites under low-stress loading. Flat unidirectional 6-layer laminates are manufactured by dry-filament winding and cured under hot compression. Four different laminates are studied: [0]6, [30]6, [60]6, and [90]6. Dynamic mechanical curves and creep behavior are highly dependent on the ply angle up to 60°. The fiber orientation does not influence significantly the glass transition temperature, except for the [0]6 laminate, which has a higher Tg compared to the other samples. Normalized dynamic mechanical curves are plotted aiming to study the behavior of the material passing through the glass transition temperature (Tg). The modulus decreases for fiber angles toward the transverse direction, but the energy dissipation occurs in a broader temperature range. Creep/recovery also demonstrates a dependency on the fiber orientation, in which the sample [0]6 (highest storage modulus) has the lowest strain, leading to higher molecular hindrance compared to the other laminates.

Original language	English
Article number	100418
Number of pages	8
Journal	Composites Communications
Volume	21
Early online date	26 Jul 2020
DOIs	https://doi.org/10.1016/j.coco.2020.100418
Publication status	Published - 01 Oct 2020
Externally published	Yes

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Viscoelastic characteristics of carbon fiber-reinforced epoxy filament wound laminates
Copyright 2020 Elsevier. This manuscript is distributed under a Creative Commons Attribution-NonCommercial-NoDerivs License (https://creativecommons.org/licenses/by-nc-nd/4.0/), which permits distribution and reproduction for non-commercial purposes, provided the author and source are cited.
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title = "Viscoelastic characteristics of carbon fiber-reinforced epoxy filament wound laminates",

abstract = "The mechanical properties of fiber-reinforced composites are time-dependent due to the viscoelastic nature of polymers. This study covers the creep/recovery and dynamic mechanical properties of high-performance composites under low-stress loading. Flat unidirectional 6-layer laminates are manufactured by dry-filament winding and cured under hot compression. Four different laminates are studied: [0]6, [30]6, [60]6, and [90]6. Dynamic mechanical curves and creep behavior are highly dependent on the ply angle up to 60°. The fiber orientation does not influence significantly the glass transition temperature, except for the [0]6 laminate, which has a higher Tg compared to the other samples. Normalized dynamic mechanical curves are plotted aiming to study the behavior of the material passing through the glass transition temperature (Tg). The modulus decreases for fiber angles toward the transverse direction, but the energy dissipation occurs in a broader temperature range. Creep/recovery also demonstrates a dependency on the fiber orientation, in which the sample [0]6 (highest storage modulus) has the lowest strain, leading to higher molecular hindrance compared to the other laminates.",

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T1 - Viscoelastic characteristics of carbon fiber-reinforced epoxy filament wound laminates

AU - Ornaghi Jr, Heitor L.

AU - Neves, Roberta M.

AU - Monticeli, Francisco M.

AU - Almeida Jr, Jose Humberto S.

PY - 2020/10/1

Y1 - 2020/10/1

N2 - The mechanical properties of fiber-reinforced composites are time-dependent due to the viscoelastic nature of polymers. This study covers the creep/recovery and dynamic mechanical properties of high-performance composites under low-stress loading. Flat unidirectional 6-layer laminates are manufactured by dry-filament winding and cured under hot compression. Four different laminates are studied: [0]6, [30]6, [60]6, and [90]6. Dynamic mechanical curves and creep behavior are highly dependent on the ply angle up to 60°. The fiber orientation does not influence significantly the glass transition temperature, except for the [0]6 laminate, which has a higher Tg compared to the other samples. Normalized dynamic mechanical curves are plotted aiming to study the behavior of the material passing through the glass transition temperature (Tg). The modulus decreases for fiber angles toward the transverse direction, but the energy dissipation occurs in a broader temperature range. Creep/recovery also demonstrates a dependency on the fiber orientation, in which the sample [0]6 (highest storage modulus) has the lowest strain, leading to higher molecular hindrance compared to the other laminates.

AB - The mechanical properties of fiber-reinforced composites are time-dependent due to the viscoelastic nature of polymers. This study covers the creep/recovery and dynamic mechanical properties of high-performance composites under low-stress loading. Flat unidirectional 6-layer laminates are manufactured by dry-filament winding and cured under hot compression. Four different laminates are studied: [0]6, [30]6, [60]6, and [90]6. Dynamic mechanical curves and creep behavior are highly dependent on the ply angle up to 60°. The fiber orientation does not influence significantly the glass transition temperature, except for the [0]6 laminate, which has a higher Tg compared to the other samples. Normalized dynamic mechanical curves are plotted aiming to study the behavior of the material passing through the glass transition temperature (Tg). The modulus decreases for fiber angles toward the transverse direction, but the energy dissipation occurs in a broader temperature range. Creep/recovery also demonstrates a dependency on the fiber orientation, in which the sample [0]6 (highest storage modulus) has the lowest strain, leading to higher molecular hindrance compared to the other laminates.

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DO - 10.1016/j.coco.2020.100418

M3 - Article

SN - 2452-2139

VL - 21

JO - Composites Communications

JF - Composites Communications

M1 - 100418

ER -

Viscoelastic characteristics of carbon fiber-reinforced epoxy filament wound laminates

Abstract

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