Details zur Publikation

Kategorie Textpublikation
Referenztyp Zeitschriften
DOI 10.1016/j.cma.2021.113951
Volltext Autorenversion
Titel (primär) Variational phase-field fracture modeling with interfaces
Autor Yoshioka, K.; Mollaali, M.; Kolditz, O. ORCID logo
Quelle Computer Methods in Applied Mechanics and Engineering
Erscheinungsjahr 2021
Department ENVINF
Band/Volume 384
Seite von art. 113951
Sprache englisch
Topic T8 Georesources
Keywords phase-field; interface failure; hydraulic fracture; natural fracture; OpenGeoSys

This paper proposes a diffused approach to approximate failure at interfaces that physically occupy negligible space compared to the bulk material. For an interface diffused over a certain length, we derive an effective interface fracture toughness based on the diffused length and the fracture toughness of the bulk and the interface. Our derivation ensures the energetic equivalence between the sharp and the diffused representations of interface.

We verified the critical energy release rates in a steadily propagating tensile fracture example as well as the critical fracture pressure and the crack length evolution in toughness dominated hydraulic fracturing. The proposed model does not require any changes in existing implementation of phase-field models. The only requirement is to assign the analytically calculated effective interface fracture toughness over a diffused sub-domain.


dauerhafte UFZ-Verlinkung
Yoshioka, K., Mollaali, M., Kolditz, O. (2021):
Variational phase-field fracture modeling with interfaces
Comput. Meth. Appl. Mech. Eng. 384 , art. 113951 10.1016/j.cma.2021.113951