成形加工
Online ISSN : 1883-7417
Print ISSN : 0915-4027
ISSN-L : 0915-4027
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35 巻, 6 号
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解説 : 特集　未来のモビリティを支える樹脂技術
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日本の大学・試験・研究機関の研究 : 229
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論文
  • 真空成形に向けた熱可塑性樹脂の粘弾性解析の検討
    池田 航介, 久我 和義, 藤川 正毅
    2023 年 35 巻 6 号 p. 212-216
    発行日: 2023/05/20
    公開日: 2023/06/20
    DOIhttps://doi.org/10.4325/seikeikakou.35.212
    ジャーナル フリー
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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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