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Main Title: Theory and Numerical Modeling of Geomechanical Multi-material Flow
Author(s): Aubram, Daniel
Savidis, Stavros A.
Rackwitz, Frank
Type: Book Part
Language Code: en
Abstract: Multi-material flow describes a situation where several distinct materials separated by sharp material interfaces undergo large deformations. The research presented in this paper addresses a particular class of multi-material flow situations encountered in geomechanics and geotechnical engineering which is characterized by a complex coupled behavior of saturated granular material as well as by a hierarchy of distinct spatial scales. Examples include geotechnical installation processes, liquefaction-induced soil failure, and debris flow. The most attractive numerical approaches to solve such problems use variants of arbitrary Lagrangian–Eulerian descriptions allowing interfaces and free surfaces to flow through the computational mesh. Mesh elements cut by interfaces (multi-material elements) necessarily arise which contain a heterogeneous mixture of two or more materials. The heterogeneous mixture is represented as an effective single-phase material using mixture theory. The paper outlines the specific three-scale mixture theory developed by the authors and the MMALE numerical method to model and simulate geomechanical multi-material flow. In contrast to traditional flow models which consider the motion of multiple single-phase materials or single multi-phase mixture, the present research succeeds in incorporating both the coupled behavior of saturated granular material and its interaction with other (pure) materials.
Issue Date: 29-Oct-2015
Date Available: 22-Oct-2019
DDC Class: 550 Geowissenschaften
Subject(s): multi-material flow
large deformations
granular material
volume averaging
interface reconstruction
volume of fluid method
Sponsor/Funder: DFG, 76838227, Numerische Modellierung der Herstellung von Rüttelinjektionspfählen
Book Title: Holistic Simulation of Geotechnical Installation Processes : Benchmarks and Simulations
Editor: Triantafyllidis, Theodoros
Publisher: Springer
Publisher Place: Cham
Publisher DOI: 10.1007/978-3-319-23159-4_10
Page Start: 187
Page End: 229
Series: Lecture Notes in Applied and Computational Mechanics
Series Number: 80
ISBN: 978-3-319-23159-4
Appears in Collections:FG Grundbau und Bodenmechanik » Publications

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