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- Title
A new non-linear continuum damage mechanics model for fatigue life prediction under variable loading.
- Authors
Rong Yuan; Haiqing Li; Hong-Zhong Huang; Shun-Peng Zhu; Yan-Feng Li
- Abstract
Fatigue is a damage accumulation process in which material property deteriorates continuously. For the usual failure mode of mechanical components under variable loading, fatigue life prediction issues are very important for selection, design, and safety assessments of these components. Based on continuum damage mechanics theory, this paper presents a new nonlinear fatigue damage accumulation model for fatigue life prediction under variable loading. The proposed model has been formulated to take the damage evolution of material and the effects of loading sequence on fatigue life under different loading conditions into account. Moreover, it considers the mean stress effects through characterizing the damage evolution of materials with fewer parameters. Experimental data of 30NiCrMoV12 and 30CrMnSiA under two-stress level loading from literature were used to verify the proposed model. Predicted fatigue lives using the proposed model show a good agreement with the reported experimental data.
- Subjects
CONTINUUM damage mechanics; PREDICTION models; MATHEMATICAL variables; MECHANICAL loads; NONLINEAR systems; MATERIAL fatigue; MECHANICAL behavior of materials
- Publication
Mechanika, 2013, Vol 19, Issue 5, p506
- ISSN
1392-1207
- Publication type
Article
- DOI
10.5755/j01.mech.19.5.5541