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Bending shape recovery of unidirectional carbon fiber reinforced epoxy-based shape memory polymer composites

Research output: Contribution to journalArticle

Original languageEnglish
Pages (from-to)169-179
Number of pages11
JournalComposites Part A: Applied Science and Manufacturing
Volume116
Early online date2 Nov 2018
DOIs
DateAccepted/In press - 31 Oct 2018
DateE-pub ahead of print - 2 Nov 2018
DatePublished (current) - Jan 2019

Abstract

The thermo-mechanical properties of unidirectional carbon fiber reinforced epoxy-based shape memory polymer (SMP) composites with fiber mass fractions of 16%, 23%, 30%, 37% are evaluated by using three-point bending tests. The SMP composites show temperature-dependent flexural modulus and strength, with one order of magnitude difference between 120 °C and 20 °C. The composites show good shape recovery capability, with measured recovery ratios of more than 93% at 120 °C and 100% after 20 min at that temperature. The recovery stresses increase nonlinearly during reheating; the maximum recovery stress is approximately proportional to the fiber mass fraction. The composites show recovery capability under external loads, with the recovery ratio being inversely proportional to the partial load level. The composites feature good shape memory properties during cyclic loading and unloading at 120 °C. Their loss factors and stiffness losses decrease significantly during the first three cycles, and then stabilize after ten cycles.

    Research areas

  • Isothermal mechanical property, Shape memory polymer composite, Shape recovery property, Three-point bending, Unidirectional carbon fiber

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  • Full-text PDF (accepted author manuscript)

    Rights statement: This is the author accepted manuscript (AAM). The final published version (version of record) is available online via Elsevier at https://www.sciencedirect.com/science/article/pii/S1359835X18304330 . Please refer to any applicable terms of use of the publisher.

    Accepted author manuscript, 4 MB, PDF document

    Embargo ends: 2/11/19

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    Licence: CC BY-NC-ND

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