A nonlinear damage cumulative model for uniaxial fatigue

On the basis of the continuum fatigue damage theory, according to the varying behavior of the material ductility in the process of fatigue damage, a new nonlinear fatigue damage cumulative model is proposed, which considered the fatigue limit, the mean stress and the unseparable characteristic for t...

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Bibliographic Details
Published in:International journal of fatigue 1999-02, Vol.21 (2), p.187-194
Main Authors: Shang, De-Guang, Yao, Wei-Xing
Format: Article
Language:English
Subjects:
Applied sciences
Damage calculation
Exact sciences and technology
Fatigue
Life prediction
Material ductility
Mechanical properties and methods of testing. Rheology. Fracture mechanics. Tribology
Metals. Metallurgy
Nonlinear fatigue damage accumulation
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Summary:On the basis of the continuum fatigue damage theory, according to the varying behavior of the material ductility in the process of fatigue damage, a new nonlinear fatigue damage cumulative model is proposed, which considered the fatigue limit, the mean stress and the unseparable characteristic for the damage variables and the loading parameter, and the effect of the loading sequence may also be included. The recurrence formula of fatigue damage model was derived under multilevel loading. The fatigue test data for two kinds of materials were used to verify the model proposed in this paper. The results show that good agreements are achieved with this model to predict fatigue life.
ISSN:0142-1123
1879-3452
DOI:10.1016/S0142-1123(98)00069-3