2014 Fiscal Year Final Research Report
Evaluation of residual stress in plastics with THz polarization measurement
| Project/Area Number |
25630017
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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 |
Production engineering/Processing studies
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| Research Institution | The University of Tokyo |
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Principal Investigator |
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| Project Period (FY) |
2013-04-01 – 2015-03-31
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| Keywords | テラヘルツ波 / 残留応力 / 結晶配向 / プラスチック / 光弾性法 |
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| Outline of Final Research Achievements |
In this study we have proposed to apply THz photoelasticity method to evaluate inside physical properties in plastic products. To verify the validity of introducing THz photoelasticity method, we have performed THz-TDS (Terahertz Time Domain Spectroscopy) to polypropylene (PP) formed by injection molding with various injection conditions. We have confirmed that the residual stress and the crystal orientation are correlated with THz polarization property, which indicate that our proposed method should be valid. The THz response contains many factors like residual stress and crystal orientation. We should isolate such individual factors by driving the evaluation of THz polarization properties in the future work.
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| Free Research Field |
加工計測
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