Details zur Publikation

Kategorie Textpublikation
Referenztyp Zeitschriften
DOI 10.1007/s10704-022-00623-5
Volltext Shareable Link
Titel (primär) On the loss of symmetry in toughness dominated hydraulic fractures
Autor Tanné, E.; Bourdin, B.; Yoshioka, K.
Quelle International Journal of Fracture
Erscheinungsjahr 2022
Department ENVINF
Band/Volume 237
Heft 1-2
Seite von 189
Seite bis 202
Sprache englisch
Topic T8 Georesources
Keywords Hydraulic fracturing; Loss of symmetry; Phase-field models of fracture; Gradient damage models
Abstract Fracking, or hydraulic fracturing, is a ubiquitous technique for generating fracture networks in rocks for enhanced geothermal systems or hydrocarbon extraction from shales. For decades, models, numerical simulation tools, and practical guidelines have been based on the assumption that this process generates networks of self-similar parallel cracks. Yet, some field and laboratory observations show asymmetric crack growth, and material heterogeneity is routinely attributed for it. Here, we show that simultaneous growth of multiple parallel cracks is impossible and that a single crack typically propagates asymmetrically in toughness dominated hydraulic fracturing, in which viscous dissipation of the fluid is negligible. In other words, loss of symmetry is a fundamental feature of hydraulic fracturing in a toughness dominated regime and not necessary the result of material heterogeneities. Our findings challenge the assumptions of symmetrical growth of hydraulic fractures commonly made in practice, and point to yet another instability other than material heterogeneity.
dauerhafte UFZ-Verlinkung
Tanné, E., Bourdin, B., Yoshioka, K. (2022):
On the loss of symmetry in toughness dominated hydraulic fractures
Int. J. Fract. 237 (1-2), 189 - 202 10.1007/s10704-022-00623-5