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Main Title: An ALE method for penetration into sand utilizing optimization-based mesh motion
Author(s): Aubram, Daniel
Rackwitz, Frank
Wriggers, Peter
Savidis, Stavros A.
Type: Article
Language Code: en
Abstract: The numerical simulation of penetration into sand is one of the most challenging problems in computational geomechanics. The paper presents an arbitrary Lagrangian–Eulerian (ALE) finite element method for plane and axisymmetric quasi-static penetration into sand which overcomes the problems associated with the classical approaches. An operator-split is applied which breaks up solution of the governing equations over a time step into a Lagrangian step, a mesh motion step, and a transport step. A unique feature of the ALE method is an advanced hypoplastic rate constitutive equation to realistically predict stress and density changes within the material even at large deformations. In addition, an efficient optimization-based algorithm has been implemented to smooth out the non-convexly distorted mesh regions that occur below a penetrator. Applications to shallow penetration and pile penetration are given which make use of the developments.
Issue Date: 2015
Date Available: 13-Aug-2018
DDC Class: 550 Geowissenschaften, Geologie
004 Datenverarbeitung; Informatik
Subject(s): arbitrary Lagrangian–Eulerian
large deformations
Sponsor/Funder: DFG, FOR 1136, Modellierung von geotechnischen Herstellungsvorgängen mit ganzheitlicher Erfassung des Spannungs-Verformungs-Verhaltens im Boden (GeoTech)
Journal Title: Computers and geotechnics
Publisher: Elsevier
Publisher Place: New York, NY [u.a.]
Volume: 65
Publisher DOI: 10.1016/j.compgeo.2014.12.012
Page Start: 241
Page End: 249
ISSN: 0266-352X
Appears in Collections:FG Grundbau und Bodenmechanik » Publications

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