Abstract
In the present paper, the applicability of the ΔJ-integral is computationally investigated under the Masing postulate. It confirms that the path-dependency of ΔJ is more severe than the J-integral under incremental plasticity. ΔJ from loading is up to 20% larger than ΔJ from unloading, which is independent of loading amplitudes but due to non-proportional stress variations. The stress range field can be characterized by ΔJ and shows an analogous mathematical structure as the known HRR solution, but not for the strain field under fatigue loading. The ΔJ dominant zone is much smaller than the HRR zone and further decreases with applied loading.
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