| Budget Amount *help |
¥23,790,000 (Direct Cost: ¥18,300,000、Indirect Cost: ¥5,490,000)
Fiscal Year 2016: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2015: ¥6,240,000 (Direct Cost: ¥4,800,000、Indirect Cost: ¥1,440,000)
Fiscal Year 2014: ¥7,020,000 (Direct Cost: ¥5,400,000、Indirect Cost: ¥1,620,000)
Fiscal Year 2013: ¥8,580,000 (Direct Cost: ¥6,600,000、Indirect Cost: ¥1,980,000)
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| Outline of Final Research Achievements |
In the present design and development of transportation equipment, it is mainstream to conduct simulation analysis using a constitutive equation considering the strain rate dependence of the structural material. In that case, a high-precision constitutive equation is required. Therefore, the dynamic strength properties of the materials are investigated using a high-rate deformation test apparatus such as the split Hopkinson pressure bar method. However, these apparatus require knowledge and skills for users, which hinders the expansion of use to public in general. Therefore, considering to utilize the effect of the strain rate processed as an error factor in the indentation test by the reversal idea, a simple evaluation method of dynamic constants for constitutive equation using the indentation has been developed. In addition, we clarified the physical meaning of the effect of the strain rate on the indentation.
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