2023 Fiscal Year Final Research Report
Strength evaluation of carbon fiber reinforced thermoplastic based on viscoelastic-viscoplastic analysis
| Project/Area Number |
21K03753
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Review Section |
Basic Section 18010:Mechanics of materials and materials-related
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| Research Institution | Shibaura Institute of Technology |
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Principal Investigator |
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| Project Period (FY) |
2021-04-01 – 2024-03-31
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| Keywords | 複合材料 / 熱可塑性樹脂 / 粘弾性 / 粘塑性 / 強度予測 |
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| Outline of Final Research Achievements |
The viscoelastic and viscoplastic behavior of polyamide 6 (PA6) and polybutylene terephthalate (PBT) are evaluated and are predicted by a mechanical model combining nonlinear viscoelasticity and plasticity or viscoplasticity. Moreover, based on the viscoelastic characteristics and the time-temperature superposition principle of thermoplastics, the temperature dependence of tensile strength and strength variation of unidirectionally reinforced thermoplastics can be predicted through the Global Load Shearing Model and its modified model.
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| Free Research Field |
材料力学
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| Academic Significance and Societal Importance of the Research Achievements |
ポリアミド6（PA6）などの熱可塑性樹脂をマトリクスとする炭素繊維強化熱可塑性樹脂（CFRTP）は構造用CFRTPとして期待されている．構造用CFRTPの設計において，低温から高温までの広い温度範囲，ならびに衝撃負荷から長期クリープまでの広いひずみ速度範囲に対する強度を予測する必要がある．本研究は一方向強化熱可塑性樹脂の強度・寿命予測法を提案しており，この成果は自動車やインフラ構造物に向けたCFRTPの設計と利用拡大に貢献できる．
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