Mechanical modeling of damage accumulation and life evaluation for stress corrosion cracking

Author:

Hou Shanqin12,Xu Jinquan1

Affiliation:

1. 1School of Naval Architecture, Ocean and Civil Engineering, Shanghai Jiaotong University, Shanghai 200240, China

2. 2School of Science, Shandong Jiaotong University, Jinan 250357, China

Abstract

AbstractTo develop damage evolution models, the process of stress corrosion cracking has been distinguished into two stages of “incubation” and static fatigue. The dominative damage accumulation mechanism in the incubation stage is stress-enhanced corrosion, whereas, in the static fatigue stage, besides the corrosion-enhanced static fatigue mechanism, stress-enhanced corrosion might be nonnegligible too. Life curves with or without threshold behavior can be well explained by considering the contribution of corrosion damage accumulation in the static fatigue stage. It has been found that the incubation life is relatively small if the total life is long, but it will play an important role when total life is short, especially in cases with singular stress field. An equivalent stress has been proposed too to deal with stress corrosion under complicated stress states.

Publisher

Walter de Gruyter GmbH

Subject

General Materials Science,General Chemical Engineering,General Chemistry

Reference54 articles.

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