Development of high-strength advanced joining technology by fatigue damage mechanism elucidation of joints on the basis of the microscopic internal observation
| Project/Area Number |
25289009
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (B)
|
| Allocation Type | Partial Multi-year Fund |
|---|
| Section | 一般 |
|---|
| Research Field |
Materials/Mechanics of materials
|
|---|
| Research Institution | Hiroshima University |
|---|
Principal Investigator |
Sugeta Atsushi 広島大学, 工学(系)研究科(研究院), 教授 (60162913)
|
|---|
| Co-Investigator(Kenkyū-buntansha) |
KATO MASAHIKO 広島大学, 大学院工学研究院, 准教授 (70274115)
AKEBONO HIROYUKI 広島大学, 大学院工学研究院, 助教 (50447215)
|
|---|
| Project Period (FY) |
2013-04-01 – 2016-03-31
|
| Project Status |
Completed (Fiscal Year 2015)
|
| Budget Amount *help |
¥18,850,000 (Direct Cost: ¥14,500,000、Indirect Cost: ¥4,350,000)
Fiscal Year 2015: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
Fiscal Year 2014: ¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
Fiscal Year 2013: ¥12,350,000 (Direct Cost: ¥9,500,000、Indirect Cost: ¥2,850,000)
|
|---|
| Keywords | 接合材 / 疲労損傷機構 / 微視的観察 / 内部観察 / 疲労寿命評価 / 疲労き裂進展 / 溶接継手 / 摩擦撹拌継手 / 革新接合材 |
|---|
| Outline of Final Research Achievements |
It revealed the fatigue strength and fatigue damage mechanism of each bonding material, such as resistance spot welded joints, remote laser welding joints and the friction stir spot joint. And also, the fatigue life prediction method under variable amplitude loading was examined. The fatigue crack initiated at the slit between upper and lower plates in any of the joints. It was clear that the fatigue life was evaluated by stress intensity factor range which is a mechanical parameter governing the singular stress field at the slip tip. The fatigue life evaluation method under variable amplitude loading, was clear that the prediction method of modified Miner’s law or Corten-Dolan method is reasonable.
|
Report
(4 results)
Research Products
(21 results)
