Numerical simulation of forerunning fracture in saturated porous solids with hybrid FEM/Peridynamic model

Tao Ni, Francesco Pesavento, Mirco Zaccariotto, Ugo Galvanetto, Bernhard A. Schrefler

Research output: Contribution to journalArticle

Abstract

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 δ-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.

Original languageEnglish (US)
Article number104024
JournalComputers and Geotechnics
Volume133
DOIs
StatePublished - May 2021

Keywords

  • Finite element method
  • Forerunning fracture
  • Numerical simulation
  • Peridynamics
  • Porous media

ASJC Scopus subject areas

  • Geotechnical Engineering and Engineering Geology
  • Computer Science Applications

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