| Budget Amount *help |
¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2017: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2016: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
Fiscal Year 2015: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
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| Outline of Final Research Achievements |
In this reserarch, we propose a device that can directly measure the complex shear modulus and tan δ values of solid-state VE materials at high frequencies under pressure conditions. We also propose a method for compensating for the shear deformation mode resonance of VE materials based on the mass of the moving part, to gain a more accurate understanding of viscoelasticity in the high-frequency range, and discuss the causes of errors in the compensation method.
The VE properties of natural rubber (NR 65 IRHD) were measured using the proposed device and compensation method, and compared to those measured by commercial VE measurement equipment, the Rheogel E-4000. The shear modulus and tan δ could be measured reliably using the developed device in the frequency range from 300 Hz to 6 kHz, and they agreed in the frequency range from 300 Hz to 1 kHz. The prototype of the proposed device was able to enlarge the mesurement frequency 6 times compared to the conventional equipment.
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