期刊
COMPUTERS AND GEOTECHNICS
卷 133, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.compgeo.2021.104024
关键词
Numerical simulation; Forerunning fracture; Porous media; Peridynamics; Finite element method
类别
资金
- MIUR under the research project PRIN2017-DEVISU
- University of Padua under the research project BIRD2018 [183703/18]
- H2020-MSCA-RISE-2016 [734370-BESTOFRAC]
- Technische Universitat Munchen -Institute for Advanced Study - German Excellence Initiative
- TUV SUD Foundation
- University of Padua [BIRD197110/19]
This paper utilizes a novel hybrid FEM and Peridynamic modeling approach to predict the dynamic solution of hydro-mechanical coupled problems. Validation is done through a one-dimensional dynamic consolidation problem and convergence studies, followed by simulations of dynamic fracturing under different loading conditions.
In this paper, a novel hybrid FEM and Peridynamic modeling approach proposed in Ni et al. (2020) is used to predict the dynamic solution of hydro-mechanical coupled problems. A modified staggered solution algorithm is adopted to solve the coupled system. A one-dimensional dynamic consolidation problem is solved first to validate the hybrid modeling approach, and both ?-convergence and mr-convergence studies are carried out to determine appropriate discretization parameters for the hybrid model. Thereafter, dynamic fracturing in a rectangular dry/ fully saturated structure with a central initial crack is simulated both under mechanical loading and fluid-driven conditions. In the mechanical loading fracture case, fixed surface pressure is applied on the upper and lower surfaces of the initial crack near the central position to force its opening. In the fluid-driven fracture case, the fluid injection is operated at the centre of the initial crack with a fixed rate. Under the action of the applied external force and fluid injection, forerunning fracture behavior is observed both in the dry and saturated conditions.
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