| Budget Amount *help |
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2019: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2018: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2017: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
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| Outline of Final Research Achievements |
High-temperature biaxial tension test apparatus was developed in this study. The heat device can heat the specimen up to 300 deg. Celsius with the errors of 1 deg. in the thickness direction and 5 deg. in plane. Additionally, x-axis of the device is displacement control while y-axis is load control based on the measured load of x-axis. This can achieve the simultaneous control of strain rate and stress ratio which is necessary for high temperature biaxial tension test.
Biaxial tension tests for A5182-O and A1050-O sheets were performed. As a results, it was found that equi-plastic work locus for A5182-O was able to express by von Mises yield criteria and the one for A1050-O was similar to the tresca criteria. For both material, the shape of plastic work loci were almost independent on temperature because these were annealed FCC materials. It was also found that the strain rate did not affect the shape of plastic work loci for both materials.
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