Details
| Original language | English |
|---|---|
| Pages (from-to) | 59-72 |
| Number of pages | 14 |
| Journal | Lecture Notes in Applied and Computational Mechanics |
| Volume | 77 |
| Publication status | Published - 12 Jun 2015 |
Abstract
The main goal of the project is the realistic simulation of pile installation processes. By considering this processes prediction of soil behaviour using numerical simulation is used. The boundary conditions, here the external loads, are the contact forces between soil and structure. For correct prediction of the external loads a suitable contact and friction model is required. During the relative movement of a pile or generally a body with a rough surface within sand, a shear zone actually develops within the sand, directly to the contacting surfaces. Thus the interaction behaviour between sand and pile results in varying coefficient of friction, which is assumed as a quantity dependent on the stress state within sand body near to the contact surface. This assumption leads to an extension of the classical formulation of friction laws used within the contact mechanics framework related to the inelastic material behaviour. As constitutive law a hypoplastic material model is used, which represents volume changing effects of sand due to loading, which are specific for granular media. The discretisation of the contact constraints based on mortar method will be described. A robust hypoplastic model will be depicted. A proposed projection procedure for calculating the coefficient of friction exploiting the mentioned localisation of the contact surfaces and thus the analogy of simple shear and triaxial test behaviour of sand will be described. For the validation of the finite element model the results are compared with experimental data obtained within a specific large scale shear test.
Keywords
- Contact mechanics, Hypoplastic material, Mortar method, Soil structure interaction
ASJC Scopus subject areas
- Engineering(all)
- Mechanical Engineering
- Computer Science(all)
- Computational Theory and Mathematics
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In: Lecture Notes in Applied and Computational Mechanics, Vol. 77, 12.06.2015, p. 59-72.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Modelling of Soil Structure Interaction by Applying a Hypoplastic Material Behaviour Within Mortar Contact Formulation
AU - Dziewiecki, P.
AU - Weißenfels, C.
AU - Wriggers, P.
N1 - Funding information: The authors would like to thank to the German Research Foundation DFG for the financial support as well as to other partners of the research group FOR 1136 Modellierung von geotechnischen Herstellungsvorgängen mit ganzheitlicher Erfassung des Spannungs-Verformungs-Verhaltens im Boden (GeoTech, Holistic Simulation of Geotechnical Installation Processes) for pleasant interdisciplinary cooperation.
PY - 2015/6/12
Y1 - 2015/6/12
N2 - The main goal of the project is the realistic simulation of pile installation processes. By considering this processes prediction of soil behaviour using numerical simulation is used. The boundary conditions, here the external loads, are the contact forces between soil and structure. For correct prediction of the external loads a suitable contact and friction model is required. During the relative movement of a pile or generally a body with a rough surface within sand, a shear zone actually develops within the sand, directly to the contacting surfaces. Thus the interaction behaviour between sand and pile results in varying coefficient of friction, which is assumed as a quantity dependent on the stress state within sand body near to the contact surface. This assumption leads to an extension of the classical formulation of friction laws used within the contact mechanics framework related to the inelastic material behaviour. As constitutive law a hypoplastic material model is used, which represents volume changing effects of sand due to loading, which are specific for granular media. The discretisation of the contact constraints based on mortar method will be described. A robust hypoplastic model will be depicted. A proposed projection procedure for calculating the coefficient of friction exploiting the mentioned localisation of the contact surfaces and thus the analogy of simple shear and triaxial test behaviour of sand will be described. For the validation of the finite element model the results are compared with experimental data obtained within a specific large scale shear test.
AB - The main goal of the project is the realistic simulation of pile installation processes. By considering this processes prediction of soil behaviour using numerical simulation is used. The boundary conditions, here the external loads, are the contact forces between soil and structure. For correct prediction of the external loads a suitable contact and friction model is required. During the relative movement of a pile or generally a body with a rough surface within sand, a shear zone actually develops within the sand, directly to the contacting surfaces. Thus the interaction behaviour between sand and pile results in varying coefficient of friction, which is assumed as a quantity dependent on the stress state within sand body near to the contact surface. This assumption leads to an extension of the classical formulation of friction laws used within the contact mechanics framework related to the inelastic material behaviour. As constitutive law a hypoplastic material model is used, which represents volume changing effects of sand due to loading, which are specific for granular media. The discretisation of the contact constraints based on mortar method will be described. A robust hypoplastic model will be depicted. A proposed projection procedure for calculating the coefficient of friction exploiting the mentioned localisation of the contact surfaces and thus the analogy of simple shear and triaxial test behaviour of sand will be described. For the validation of the finite element model the results are compared with experimental data obtained within a specific large scale shear test.
KW - Contact mechanics
KW - Hypoplastic material
KW - Mortar method
KW - Soil structure interaction
UR - http://www.scopus.com/inward/record.url?scp=84931272910&partnerID=8YFLogxK
U2 - 10.1007/978-3-319-18170-7_4
DO - 10.1007/978-3-319-18170-7_4
M3 - Article
AN - SCOPUS:84931272910
VL - 77
SP - 59
EP - 72
JO - Lecture Notes in Applied and Computational Mechanics
JF - Lecture Notes in Applied and Computational Mechanics
SN - 1613-7736
ER -