Details
| Original language | English |
|---|---|
| Pages (from-to) | 241-249 |
| Number of pages | 9 |
| Journal | Computers and geotechnics |
| Volume | 65 |
| Publication status | Published - 15 Jan 2015 |
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.
Keywords
- Arbitrary lagrangian-eulerian, Large deformations, Penetration, Pile, Sand
ASJC Scopus subject areas
- Earth and Planetary Sciences(all)
- Geotechnical Engineering and Engineering Geology
- Computer Science(all)
- Computer Science Applications
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In: Computers and geotechnics, Vol. 65, 15.01.2015, p. 241-249.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - An ALE method for penetration into sand utilizing optimization-based mesh motion
AU - Aubram, D.
AU - Rackwitz, F.
AU - Wriggers, P.
AU - Savidis, S. A.
N1 - Funding information: The presented research work was carried out under the financial support from the German Research Foundation (DFG), Grants SA 310/21-1 and SA 310/21-2 , which is gratefully acknowledged.
PY - 2015/1/15
Y1 - 2015/1/15
N2 - 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.
AB - 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.
KW - Arbitrary lagrangian-eulerian
KW - Large deformations
KW - Penetration
KW - Pile
KW - Sand
UR - http://www.scopus.com/inward/record.url?scp=84921055068&partnerID=8YFLogxK
U2 - 10.1016/j.compgeo.2014.12.012
DO - 10.1016/j.compgeo.2014.12.012
M3 - Article
AN - SCOPUS:84921055068
VL - 65
SP - 241
EP - 249
JO - Computers and geotechnics
JF - Computers and geotechnics
SN - 0266-352X
ER -