- 著者
- Ichiro OHNO
- 出版者
- The Seismological Society of Japan, The Volcanological Society of Japan, The Geodetic Society of Japan
- 雑誌
- Journal of Physics of the Earth (ISSN:00223743)
- 巻号頁・発行日
- vol.24, no.4, pp.355-379, 1976 (Released:2009-04-30)
- 参考文献数
- 8
- 被引用文献数
- 287 380
A theory was developed on the free vibration of a crystal of rectangular parallelepiped and of general symmetry by extending Demarest's theory of cube resonance. All vibrational modes were classified and described in detail for the case of orthorhombic symmetry. The theory is applied to determine elastic constants of crystals from the resonance frequencies of its free vibrations. The method of numerical analysis of resonance frequency data was studied to derive a practical way of elastic constant determination. As an example, the elastic constants of two specimens of single crystal olivine (Mg1.8Fe0.2SiO4) were determined. The applicability of the resonance method is largely extended by the present theory to the precise determination of elastic constants of single crystals.
- 著者
- Ko-ichiro Ohno Yoshiki Kitamura Sohei Sukenaga Sungo Natsui Takayuki Maeda Kazuya Kunitomo
- 出版者
- The Iron and Steel Institute of Japan
- 雑誌
- ISIJ International (ISSN:09151559)
- 巻号頁・発行日
- vol.60, no.7, pp.1512-1519, 2020-07-15 (Released:2020-07-16)
- 参考文献数
- 11
- 被引用文献数
- 5 8
Negative effect from low coke rate operation at cohesive zone is obvious because it makes thinning of coke slit thickness. Correct knowledge about gas permeability of cohesive layer is becoming more and more important. In order to precisely understand cohesive behaviour, a softening and melting simulator under rapid heating and quenching conditions was applied for clarify a determinant factor of gas permeability behaviour. To focus on softening and melting behaviour, granulated slag particle bed layer without iron oxide was prepared as packed bed sample layer can show softening and melting. The packed bed slag samples in graphite crucible were rapidly heated up to 1200°C, and then gradually heated up to 1500°C with 10°C/min under inert gas atmosphere and 0.1 MPa load. Gas pressure drop and shrinkage degree of the sample layer were measured during the softening and melting test, and quenched sample was made at certain temperature when the maximum gas pressure drop was measured. The CT observation of the quenched sample provided 3D shape information of gas path shape in sample packed bed. Gas pressure drop was estimated with fanning’s equation with the gas path information. The estimation values were shown positive correlation with measured maximum pressure drop. The CT observation also gave triple line length among molten slag, graphite, and gas. Combination the triple line length and molten slag surface tension could use for evaluation of static force balance when maximum pressure drop obtained.