Abstract
The constitutive equation under the low-cycle fatigue (LCF) was discussed, and a two-dimensional (2-D) model for simulating fatigue crack extension was put forward in order to propose a new cyclic J-integral. The definition, primary characteristics, physical interpretations and numerical evaluation of the new parameter were investigated in detail. Moreover, the new cyclic J-integral for LCF behaviors was validated by the compact tension (CT) specimens. Results show that the calculated values of the new parameter can correlate well with LCF crack growth rate, during constant-amplitude loading. In addition, the phenomenon of fatigue retardation was explained through the viewpoint of energy based on the concept of the new parameter.
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Project supported by the Municipal Key Subject Program of Shanghai (No.Y0103)
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Hu, Hj., Guo, Xm., Li, Pn. et al. A new cyclic J-integral for low-cycle fatigue crack growth. Appl Math Mech 27, 149–160 (2006). https://doi.org/10.1007/s10483-006-0202-z
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DOI: https://doi.org/10.1007/s10483-006-0202-z