An investigation of the step-wise propagation of a mode-II fracture in a poroelastic medium
| Autor: | Jmrj Jacques Huyghe, Dmj David Smeulders, EW Ernst Remij, Jjc Joris Remmers |
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| Přispěvatelé: | Energy Technology, Mechanics of Materials, EAISI High Tech Systems |
| Rok vydání: | 2017 |
| Předmět: |
Dilatant
Materials science EXtended Finite Element Method Poromechanics 02 engineering and technology Shear fractures 01 natural sciences Discontinuity (geotechnical engineering) 0203 mechanical engineering Fluid dynamics Porous materials General Materials Science 0101 mathematics Pressure gradient Civil and Structural Engineering Extended finite element method business.industry Mechanical Engineering Mechanics Structural engineering Condensed Matter Physics Finite element method 010101 applied mathematics 020303 mechanical engineering & transports Mechanics of Materials Displacement field business |
| Zdroj: | Mechanics Research Communications, 80, 10-15. Elsevier BASE-Bielefeld Academic Search Engine |
| ISSN: | 0093-6413 |
| DOI: | 10.1016/j.mechrescom.2016.03.001 |
| Popis: | In this paper we use an eXtended Finite Element Method based model for the simulation of shear fracture in fully saturated porous materials. The fracture is incorporated as a strong discontinuity in the displacement field by exploiting the partition of unity property of finite element shape functions. The pressure is assumed to be continuous across the fracture. However, the pressure gradient, i.e. the fluid flow, can be discontinuous. The failure process is described by the cohesive zone approach and a Tresca fracture condition without dilatancy. We investigate the propagation of a shear fracture under compression asking the question whether or not a Tresca criterion can result in stepwise propagation in a poroelastic medium. In order to evaluate possible numerical artefacts, we also look at the influence of the element size and the magnitude of a time increment. The performance of the X-FEM model and the influence of the pore pressure on the fracture propagation are addressed. Our simulations do not show evidence for step wise progression in mode II failure. |
| Databáze: | OpenAIRE |
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