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Asymptotic Modelling of Fractures with Constricted Opening
Fractures in geomaterials do not grow as a continuous surface as they are affected by local interruptions and overlapping. These form bridges which being distributed all over the fracture constrict its opening. The effect of the distributed bridges is modelled by an equivalent Winkler layer whose stiffness represents the total bridge stiffness per unit area of the fracture. The paper develops approximate expressions for the stress intensity factors and volume (area in 2D) of fracture opening under uniform tensile load based on interpolating between the asymptotics of small and large fractures. A case of growth of a fracture with constricted opening under displacement-control loading is analysed. The presented results can be important in modelling of fracture propagation in heterogenous materials.
Asymptotic Modelling of Fractures with Constricted Opening
Fractures in geomaterials do not grow as a continuous surface as they are affected by local interruptions and overlapping. These form bridges which being distributed all over the fracture constrict its opening. The effect of the distributed bridges is modelled by an equivalent Winkler layer whose stiffness represents the total bridge stiffness per unit area of the fracture. The paper develops approximate expressions for the stress intensity factors and volume (area in 2D) of fracture opening under uniform tensile load based on interpolating between the asymptotics of small and large fractures. A case of growth of a fracture with constricted opening under displacement-control loading is analysed. The presented results can be important in modelling of fracture propagation in heterogenous materials.
Asymptotic Modelling of Fractures with Constricted Opening
Springer Ser.Geomech.,Geoengineer.
Pasternak, Elena (editor) / Dyskin, Arcady (editor) / Pasternak, Elena (author) / Dyskin, Arcady V. (author)
International Workshop on Bifurcation and Degradation in Geomaterials ; 2022 ; perth, WA, Australia
Multiscale Processes of Instability, Deformation and Fracturing in Geomaterials ; Chapter: 14 ; 136-143
2022-12-13
8 pages
Article/Chapter (Book)
Electronic Resource
English
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