Abstract
The present paper computationally investigated and characterized thermo-mechanical crack-tip fields under elastoplastic fatigue crack growth. The ΔJ-integral is generally path-dependent and its far-field value is introduced to describe the singular crack tip field under considering thermo-mechanical loading influence. The influence of crack closure in fatigue crack growth is studied and quantified for thermo-mechanical fatigue crack growth. It confirms that the incorporation of temperature cycling does not affect the solution form of the crack-tip field dominated by ΔJeff, in analogy to an isothermal fatigue crack. However, the singular crack stress and the far-field effective ΔJefffor TMF are affected by the phase angle of the thermo-mechanical loads.
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