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Characterizing viscoelastic properties of carbon fiber/epoxy composites using vector fitting method
Author(s) -
Li Huimin,
Cheng Tianbao,
Zhang Boming,
Ma Yongbin,
Xu Baosheng,
Wang Yana
Publication year - 2018
Publication title -
polymer composites
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.577
H-Index - 82
eISSN - 1548-0569
pISSN - 0272-8397
DOI - 10.1002/pc.24377
Subject(s) - materials science , viscoelasticity , composite material , epoxy , dynamic mechanical analysis , dynamic modulus , modulus , fiber , relaxation (psychology) , composite number , flexural strength , work (physics) , polymer , thermodynamics , psychology , social psychology , physics
In this work, mechanical properties of a T800 carbon fiber/modified epoxy composite material were researched by using a dynamic mechanical analyzer (DMA) operated under flexural mode. The dynamic mechanical behavior was investigated by DMA at a fixed frequency of 1 Hz. Because mechanical properties of the material were influenced by both time and temperature, its viscoelastic modulus was also considered and accomplished by conducting DMA multiple‐frequency dynamic mechanical experiments. Based on the experimental data, master curves of the storage (E′) and the loss moduli (E″) at a pre‐selected reference temperature were constructed as a function of frequency. The shift factor along the frequency axis was also determined as a function of temperature. Expression of the relaxation modulus in the time domain at the reference temperature was obtained by using vector fitting method. The numerical algorithm result showed excellent correlation to experimental data over the entire range of relaxation. POLYM. COMPOS., 39:E2000–E2005, 2018. © 2017 Society of Plastics Engineers