Chapter
Jul 11, 2012
A Small Time Scale Model for Creep Fatigue Crack Growth Analysis
Authors: Zizi Lu [email protected], Jifeng Xu [email protected], and Yongming Liu [email protected]Author Affiliations
Publication: Earth and Space 2012: Engineering, Science, Construction, and Operations in Challenging Environments
Abstract
A novel small time scale model is proposed in this paper for the creep fatigue crack growth analysis. The proposed model is time-based formulation and does not need to transform the realistic loading history to cycles for fatigue analysis. The key idea is to formulate the instantaneous crack growth kinetics with respect to the crack tip opening displacement (CTOD). Creep deformation is included in the CTOD calculation and the effect of frequency/ hold time is intrinsicaly included in the proposed formulation. Crack growth under mechanical and thermal loadings can be directly calculated by the time domain integration according to the specified mechanical and thermal loading history. Various experimental data from the open literature for metals are used to validate the proposed method and a satisfactory agreement is observed.
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Published In
Earth and Space 2012: Engineering, Science, Construction, and Operations in Challenging Environments
Pages: 610 - 620
Copyright
© 2012 American Society of Civil Engineers.
History
Published online: Jul 11, 2012
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Authors
Affiliations
Composites & Structure department, Beijing Aeronautical Science & Technology Research Institute, Beijing, China, 100083. E-mail: [email protected]
Composites & Structure department, Beijing Aeronautical Science & Technology Research Institute, Beijing, China, 100083. E-mail: [email protected]
Civil & Environmental Engineering, Clarkson University, Potsdam, NY, 13699-5710.E-mail: [email protected]
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