2012 Fiscal Year Final Research Report
Effect of compression overload on fatigue strength ofwelded joint improved by compression residual stress
| Project/Area Number |
23760423
|
|---|
| Research Category |
Grant-in-Aid for Young Scientists (B)
|
| Allocation Type | Multi-year Fund |
|---|
| Research Field |
Structural engineering/Earthquake engineering/Maintenance management engineering
|
|---|
| Research Institution | Kyoto University |
|---|
Principal Investigator |
|
|---|
| Project Period (FY) |
2011 – 2012
|
| Keywords | 溶接継手 / 疲労強度 / 圧縮残留応力 / 圧縮のオーバーロード |
|---|
| Research Abstract |
For improving the fatigue strength of welded joints, introducing the residual stress at weld toe by peening is often used. If a compression overload is subjected after peening, however, the residual compressive stress at weld toe will shift the tensile stress region. Therefore, the improved fatigue strength by residual compression stress at weld toe will be reduced after the compression overloaded. In this research, the effect of compression overload on fatigue strength improved by residual compression stress was clarified by the plate bending type of fatigue tests.
|
