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Beiträge in Tagungsbänden:

J. Pistrol, F. Falkner, D. Adam, C. Adam:
"Comparison of constitutive soil models for the simulation of dynamic roller compaction";
in: "CD-ROM Proceedings of the 6th European Congress on Computational Methods in Applied Sciences and Engineering (ECCOMAS 2012)", J. Eberhardsteiner, H. J. Böhm, F. G. Rammerstorfer (Hrg.); herausgegeben von: Viennna University of Technology; ECCOMAS, 2012, ISBN: 978-3-9502481-9-7, Paper-Nr. 2404, 15 S.



Kurzfassung englisch:
Realistic modeling of dynamic roller soil compaction requires the consideration of various sources of nonlinearities. An appropriate contact formulation is necessary to model the interaction between soil and roller. Moving of the roller results in large rigid body mo- tions, which should be taken into account in numerical simulations. Furthermore, a nonlinear constitutive law should describe roller induced soil compaction. In the presented study two different rate-independent elasto-plastic constitutive laws for soil are evaluated on their abil- ity to predict the natural behavior of soil subjected to dynamic loading of a moving roller. One of the constitutive laws is the Mohr-Coulomb criterion, where the evolution of plastic strains is modeled by means of a non-associated flow rule. According to the implemented smooth flow potential the volumetric plastic strains increase in case of yielding. The second constitutitive model tested is based on the Drucker-Prager yield surface, which describes shear failure, however, extended by a cap to consider also failure in compression. To each of both yield surfaces a different flow potential of elliptic shape is assigned to account for the evolution of volumetric plastic strains.

Schlagworte:
constitutive soil model, dynamic compaction, roller, soil dynamics


Elektronische Version der Publikation:
http://publik.tuwien.ac.at/files/PubDat_210049.pdf


Erstellt aus der Publikationsdatenbank der Technischen Universitšt Wien.