University of Cambridge > Talks.cam > BPI Seminar Series > Energy release rate in hydraulic fracture: Can we neglect an impact of the hydraulically induced shear stress?

Energy release rate in hydraulic fracture: Can we neglect an impact of the hydraulically induced shear stress?

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We discuss a novel model of hydraulic fracture (HF) formulation which accounts for the hydraulically induced shear stress at the crack faces. It utilizes a general form of the elasticity operator alongside a revised fracture propagation condition based on the critical value of the energy release rate.

We show that the revised formulation is always in agreement with the linear elastic fracture mechanics. Furthermore, our numerical simulations have highlighted advantages of the revised HF model in comparison with those which fail to account for the shear stress. In particular, we found that the small toughness regime no longer presents a significant computational challenge. The modified formulation opens new ways to analyse the physical phenomenon of HF, as well as improving the reliability and efficiency of its numerical simulation.

This talk is part of the BPI Seminar Series series.

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