| Mechanical Engineering |
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| A nonlinear cumulative evolution model for corrosion fatigue damage |
| Zhong-ying Han, Xiao-guang Huang, Yu-guang Cao, Jin-quan Xu |
| College of Petroleum Engineering, China University of Petroleum, Qingdao 266580, China; College of Pipeline and Civil Engineering, China University of Petroleum, Qingdao 266580, China; School of Naval Architecture, Ocean and Civil Engineering, Shanghai Jiao Tong University, Shanghai 200240, China |
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Abstract A nonlinear cumulative evolution model for corrosion fatigue damage was proposed. Corrosion fatigue damage was considered as a nonlinear cumulative result of stress corrosion damage and fatigue damage. The influences of stress corrosion damage and fatigue damage on corrosion fatigue damage and damage evolution life were studied from a phenomenological point of view. The relevant damage parameters were determined by the experimental results of the LY12CZ aluminum alloy, and the corrosion fatigue life evaluation model based on damage evolution law was established. The corrosion fatigue life predicted by evaluation model agrees well with the experimental result. The damage evolution model in this study can provide a new method for theoretical research and life prediction of corrosion fatigue.
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Received: 29 October 2013
Published: 04 June 2014
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