Modeling of polymer plasticity based on plastic deformation of crystalline and amorphous phases
| Project/Area Number |
25630003
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Multi-year Fund |
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| Research Field |
Materials/Mechanics of materials
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| Research Institution | Tohoku University |
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Principal Investigator |
AOYAGI Yoshiteru 東北大学, 工学(系)研究科(研究院), 准教授 (70433737)
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| Project Period (FY) |
2013-04-01 – 2015-03-31
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| Project Status |
Completed (Fiscal Year 2014)
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| Budget Amount *help |
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2014: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2013: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
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| Keywords | 高分子材料 / 球晶 / ポリプロピレン / 階層的モデリング / 力学特性 / 塑性力学 |
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| Outline of Final Research Achievements |
Micro structures and stress-strain response of polypropylene with different spherulite size prepared by changing the cooling conditions in order to investigate effects of crystalline and amorphous structures on mechanical properties of crystalline polymers. The crystallinity, elastic modulus and yield stress increase with increasing spherulite size. We perform a polymer plasticity simulation considering a spherulite structure consisting of the amorphous and crystalline phases. Information on the crystallinity of spherulite obtained from experiments is introduced into a computational model. We thoroughly evaluate the effect of the spherulite structure on the material properties of polypropylene. Moreover, we investigate microscopic plasticity behavior of crystalline and amorphous phases by the molecular dynamics simulation. Localized slip deformation is propagated thorough the sample with kink rotation of molecular chains.
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Report
(3 results)
Research Products
(11 results)
