Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Does the viscoelastic behavior of fully cured epoxy depend on the thermal history during curing?
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Machine Elements. Institute of Mechanics and Mechanical Engineering, Riga Technical University, Riga, Latvia; Materials Engineering Department, Federal University of Rio Grande do Sul, Porto Alegre, Brazil.ORCID iD: 0000-0001-6457-4028
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Material Science.ORCID iD: 0000-0001-5550-2962
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Material Science.ORCID iD: 0000-0002-5948-7525
Materials Engineering Department, Federal University of Rio Grande do Sul, Porto Alegre, Brazil.ORCID iD: 0000-0003-4873-2238
Show others and affiliations
2022 (English)In: Journal of composite materials, ISSN 0021-9983, E-ISSN 1530-793X, Vol. 56, no 22, p. 3439-3453Article in journal (Refereed) Published
Abstract [en]

Residual strains and shape distortions in a polymer-based composite structure may depend on the cure schedule used for manufacture. Aiming to understand the cure history effects, the influence of the curing “path” (time tc and temperature Tc path during curing) on viscoelastic (VE) response of a fully cured (FC) (alpha = 0.992) epoxy was investigated. Five different “families” of the same epoxy were manufactured in constraint-free conditions using different sets of curing parameters. Then, tensile tests were performed at different temperatures (T = 30 to 110 °C), and the time-temperature superposition principle (TTSP) and Schapery’s type of linear viscoelastic (VE) model, accounting for physical aging of specimens tested at high temperature, were used. The results show that the VE properties of the studied epoxy are independent of the curing history provided that at the end all specimens are fully cured. Also, the physical aging rate at high temperatures of all “families” is the same and it can be described by a simple aging-temperature independent equation reported in Nunes et al1 It is expected that curing history of unconstrained and fully cured epoxy has an insignificant effect on final viscoelastic behavior, a knowledge which could assist in developing more time and cost-efficient cure cycles.

Place, publisher, year, edition, pages
Sage Publications, 2022. Vol. 56, no 22, p. 3439-3453
Keywords [en]
epoxy, curing history, viscoelasticity, physical aging, shift factors, simulations
National Category
Other Materials Engineering
Research subject
Polymeric Composite Materials; Machine Elements
Identifiers
URN: urn:nbn:se:ltu:diva-92323DOI: 10.1177/00219983221115850ISI: 000826103600001Scopus ID: 2-s2.0-85134535047OAI: oai:DiVA.org:ltu-92323DiVA, id: diva2:1684980
Note

Validerad;2022;Nivå 2;2022-09-26 (hanlid);

Funder: European Regional Development Fund (1.1.1.2/VIAA/4/20/641); Swedish Foundation for International Cooperation in Research and Higher Education, STINT; Higher Education Improvement Coordination CAPES/Brazil

Available from: 2022-07-29 Created: 2022-07-29 Last updated: 2022-09-26Bibliographically approved

Open Access in DiVA

No full text in DiVA

Other links

Publisher's full textScopus

Authority records

Nunes, Stephanie GoncalvesAl-Maqdasi, ZainabFernberg, PatrikVarna, Janis

Search in DiVA

By author/editor
Nunes, Stephanie GoncalvesAl-Maqdasi, ZainabFernberg, PatrikAmico, Sandro CamposVarna, Janis
By organisation
Machine ElementsMaterial Science
In the same journal
Journal of composite materials
Other Materials Engineering

Search outside of DiVA

GoogleGoogle Scholar

doi
urn-nbn

Altmetric score

doi
urn-nbn
Total: 220 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf