On creep, recovery, and stress relaxation of carbon fiber-reinforced epoxy filament wound composites

José Humberto S. Almeida Jr; Heitor L. Ornaghi Jr; Natália P. Lorandi; Gerson Marinucci; Sandro  Amico

doi:10.1002/pen.24790

On creep, recovery, and stress relaxation of carbon fiber-reinforced epoxy filament wound composites

José Humberto S. Almeida Jr, Heitor L. Ornaghi Jr, Natália P. Lorandi, Gerson Marinucci, Sandro Amico

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Abstract

This work encompasses an analytical procedure and experimental tests for the study of creep/recovery, stress relaxation, and viscoelastic behavior, focusing on the glassy state, of carbon fiber-reinforced epoxy filament wound composites of distinct fiber orientation: [0]4, [30]4, and [60]4. The laminate with longitudinally aligned fibers did not show significant creep and its storage modulus was the highest in comparison to the other angles. Both creep and recovery responses were studied based on a Weibull distribution approach at two stress levels (2 and 5 MPa) and the results were found more comprehensive for the highest level. Stress relaxation modulus was calculated using 1% strain and decreased with the fiber orientation angle. The results were corroborated by those of isothermal tests based on non-linear regression.

Original language	English
Pages (from-to)	1837-1842
Number of pages	6
Journal	Polymer Engineering & Science
Volume	58
Issue number	10
Early online date	22 Dec 2017
DOIs	https://doi.org/10.1002/pen.24790
Publication status	Published - Oct 2018
Externally published	Yes

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On creep, recovery, and stress relaxation of carbon fiber-reinforced epoxy filament wound composites
Copyright 2021 Society of Plastics Engineers. This work is made available online in accordance with the publisher’s policies. Please refer to any applicable terms of use of the publisher.
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title = "On creep, recovery, and stress relaxation of carbon fiber-reinforced epoxy filament wound composites",

abstract = "This work encompasses an analytical procedure and experimental tests for the study of creep/recovery, stress relaxation, and viscoelastic behavior, focusing on the glassy state, of carbon fiber-reinforced epoxy filament wound composites of distinct fiber orientation: [0]4, [30]4, and [60]4. The laminate with longitudinally aligned fibers did not show significant creep and its storage modulus was the highest in comparison to the other angles. Both creep and recovery responses were studied based on a Weibull distribution approach at two stress levels (2 and 5 MPa) and the results were found more comprehensive for the highest level. Stress relaxation modulus was calculated using 1% strain and decreased with the fiber orientation angle. The results were corroborated by those of isothermal tests based on non-linear regression.",

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AU - Almeida Jr, José Humberto S.

AU - Ornaghi Jr, Heitor L.

AU - Lorandi, Natália P.

AU - Marinucci, Gerson

AU - Amico, Sandro

PY - 2018/10

Y1 - 2018/10

N2 - This work encompasses an analytical procedure and experimental tests for the study of creep/recovery, stress relaxation, and viscoelastic behavior, focusing on the glassy state, of carbon fiber-reinforced epoxy filament wound composites of distinct fiber orientation: [0]4, [30]4, and [60]4. The laminate with longitudinally aligned fibers did not show significant creep and its storage modulus was the highest in comparison to the other angles. Both creep and recovery responses were studied based on a Weibull distribution approach at two stress levels (2 and 5 MPa) and the results were found more comprehensive for the highest level. Stress relaxation modulus was calculated using 1% strain and decreased with the fiber orientation angle. The results were corroborated by those of isothermal tests based on non-linear regression.

AB - This work encompasses an analytical procedure and experimental tests for the study of creep/recovery, stress relaxation, and viscoelastic behavior, focusing on the glassy state, of carbon fiber-reinforced epoxy filament wound composites of distinct fiber orientation: [0]4, [30]4, and [60]4. The laminate with longitudinally aligned fibers did not show significant creep and its storage modulus was the highest in comparison to the other angles. Both creep and recovery responses were studied based on a Weibull distribution approach at two stress levels (2 and 5 MPa) and the results were found more comprehensive for the highest level. Stress relaxation modulus was calculated using 1% strain and decreased with the fiber orientation angle. The results were corroborated by those of isothermal tests based on non-linear regression.

U2 - 10.1002/pen.24790

DO - 10.1002/pen.24790

M3 - Article

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VL - 58

SP - 1837

EP - 1842

JO - Polymer Engineering & Science

JF - Polymer Engineering & Science

IS - 10

ER -

On creep, recovery, and stress relaxation of carbon fiber-reinforced epoxy filament wound composites

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