Measurement of electromagnetic waves generated by impact fracture of igneous rocks and sedimentary rocks and solution of its mechanism
| Project/Area Number |
15K05676
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (C)
|
| Allocation Type | Multi-year Fund |
|---|
| Section | 一般 |
|---|
| Research Field |
Materials/Mechanics of materials
|
|---|
| Research Institution | Osaka University |
|---|
Principal Investigator |
|
|---|
| Co-Investigator(Kenkyū-buntansha) |
谷垣 健一 大阪大学, 基礎工学研究科, 助教 (40631875)
堀川 敬太郎 大阪大学, 基礎工学研究科, 准教授 (50314836)
|
|---|
| Project Period (FY) |
2015-04-01 – 2018-03-31
|
| Project Status |
Completed (Fiscal Year 2017)
|
| Budget Amount *help |
¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2017: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2016: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2015: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
|
|---|
| Keywords | 人工水晶 / 花崗岩 / 斑れい岩 / 閃緑岩 / 圧縮破壊 / ホプキンソン棒法 / 電磁波 / 二点ゲージ計測法 / 静電界電磁波 / 火成岩 / 衝撃圧縮破壊 / 衝撃剪断破壊 / 衝撃曲げ破壊 / 光 |
|---|
| Outline of Final Research Achievements |
In first two years, we studied about the clarification of the relationship between the mechanical properties of synthetic quartz and the electromagnetic phenomena during its fracture A series of uniaxial compression tests were carried out at quasi-static and dynamic rates. Not only the stress-strain curves but also the electromagnetic waves generated during the fracture of specimens were measured in a shield box made of permalloy plates. The dynamic compressive strength was greater than those in static tests and there is strain-rate dependence in their strength of synthetic quartz. It was also found that the electromagnetic phenomenon does not depend on the loading direction even at dynamic rate.
In the 3-rd year, some uniaxial compression tests for granite, gabbro and diorite were performed at quasi-static and dynamic rates. Relatively large electromagnetic waves were measured when these rocks fractured even at quasi-static rates.
|
Report
(4 results)
Research Products
(3 results)
