A simplified modelling of hydraulic fractures in elasto-plastic materials
International Journal of Fracture, 2022•Springer
In this paper the problem of a plane strain hydraulic fracture propagating in an elasto-plastic
material is analyzed. A new stress redistribution model for the proximity of the fracture tip is
formulated and a resulting plasticity-dependent crack propagation condition is introduced. A
modified variant of the KGD problem that accounts for the plastic deformations in the near-tip
zone only is proposed. It is demonstrated that this model can be a credible substitute for the
full elasto-plastic hydraulic fracture problem in the case of moderate plastic deformation. The …
material is analyzed. A new stress redistribution model for the proximity of the fracture tip is
formulated and a resulting plasticity-dependent crack propagation condition is introduced. A
modified variant of the KGD problem that accounts for the plastic deformations in the near-tip
zone only is proposed. It is demonstrated that this model can be a credible substitute for the
full elasto-plastic hydraulic fracture problem in the case of moderate plastic deformation. The …
Abstract
In this paper the problem of a plane strain hydraulic fracture propagating in an elasto-plastic material is analyzed. A new stress redistribution model for the proximity of the fracture tip is formulated and a resulting plasticity-dependent crack propagation condition is introduced. A modified variant of the KGD problem that accounts for the plastic deformations in the near-tip zone only is proposed. It is demonstrated that this model can be a credible substitute for the full elasto-plastic hydraulic fracture problem in the case of moderate plastic deformation. The crack-tip shielding effect introduced by the plastic deformation is quantified.
Springer
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