Seikei-Kakou
Online ISSN : 1883-7417
Print ISSN : 0915-4027
ISSN-L : 0915-4027
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Volume 35, Issue 6
Displaying 1-14 of 14 articles from this issue
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Index
Foreword
Technical Notes : Special Issue on Polymer Technologies for Future Mobility
Technical Reports
Report from Universities and Institutions in Japan : 229
Report of Meetings and Trade Fair
Original Paper
  • Study on Viscoelastic Analysis of a Thermoplastic Resin Used for Vacuum Forming
    Kosuke Ikeda, Kazunori Kuga, Masaki Fujikawa
    2023 Volume 35 Issue 6 Pages 212-216
    Published: May 20, 2023
    Released on J-STAGE: June 20, 2023
    DOIhttps://doi.org/10.4325/seikeikakou.35.212
    JOURNAL FREE ACCESS
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    A large strain creep analysis method for polymethyl methacrylate (PMMA), a common thermoplastic resin, was investigated in the target-temperature-range (393. 15 K) and target-strain-range (approximately 50% strain) for vacuum forming. The proposed model is based on the largedeformation viscoelastic model, which assumes that the deformation characteristics of PMMA are rubber-like in the target-temperature-range and that linearity is maintained in the viscoelastic behavior around target-strain-range.

    All material constants of the model can be determined from the results of a dynamic measurement tester (DMA) obtained from the temperature/frequency sweep at small strain amplitudes (0.1% strain). Numerical experiments were conducted to confirm the validity of the method by DMA testing and creep testing in the target-temperature/strain. As the a results, it was confirmed that the FEM analysis constructed by the proposed scheme can predict the mechanical properties of the vacuum forming-oriented creep test. These results are expected to provide important insight into the complex mechanical behavior of PMMA as it varies with temperature and strain rate.

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