2012 Fiscal Year Final Research Report
Elucidation of mechanism of stress corrosion cracking and guidelines for lifetime estimation of structural materials
| Project/Area Number |
23760095
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Materials/Mechanics of materials
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| Research Institution | Shizuoka University |
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Principal Investigator |
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| Project Period (FY) |
2011 – 2012
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| Keywords | 応力腐食割れ / き裂進展速度 / J積分 / 応力拡大係数 / 塑性変形 / オーステナイト系ステンレス鋼 |
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| Research Abstract |
The elastic-plastic fracture mechanics parameter taking account of plastic deformation was proposed to investigate crack growth by stress corrosion cracking. The stress corrosion crack growth was affected by plastically deformed area. That is, the crack growth rate under the large scale yielding condition is higher than under the small scale yielding condition when applied stress intensity factor is same level. The appropriate parameter to evaluate the crack growth rate is equivalent stress intensity factor defined by J integral.
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