Research Project
Grant-in-Aid for Young Scientists (B)
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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