Crack opening and closure detection through coupled DCPD and non-continuous DIC method -- Application to LCF tests

Théotime Asselin; Olivier Ancelet; Guillaume Benoit; Florence Hamon; Valéry Valle; Gilbert Hénaff

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arXiv · 2606.18007

Crack opening and closure detection through coupled DCPD and non-continuous DIC method -- Application to LCF tests

Théotime Asselin·Olivier Ancelet·Guillaume Benoit·Florence Hamon·Valéry Valle·Gilbert Hénaff

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Abstract

The crack closure effect of a low-alloyed steel subjected to low-cycle fatigue loading has been characterized at two different imposed strain amplitudes. Two techniques (non-continuous DIC H-DIC and DCPD) have been employed in this aim, leading to similar conclusions. Thus, it is shown that the crack does not remain completely closed during a part of the compressive portion of the fatigue cycle for both applied loadings. The crack opening strains, combined with the cyclic stress-strain curve of the material allowed to determine an equivalent cyclic opening stress. This confirmed that the crack opening stresses decrease with the applied maximum stress when subjected to tension-compression loading, as commonly found in the literature.

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Théotime Asselin, Olivier Ancelet, Guillaume Benoit, Florence Hamon, Valéry Valle, Gilbert Hénaff. 2026-06-16. Crack opening and closure detection through coupled DCPD and non-continuous DIC method -- Application to LCF tests. https://arxiv.org/abs/2606.18007

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