This work presents a robust and mesh-independent implementation of an elasto-plastic constitutive model at large strains, appropriate for structured soils, into a Particle Finite Element code specially developed for geotechnical simulations. The constitutive response of structured soils is characterized by softening and, thus, leading to strain localization. Strain localization poses two numerical challenges: mesh dependence of the solution and computability of the solution. The former is mitigated by employing a non-local integral type regularization whereas an Implicit-Explicit integration scheme is used to enhance the computability. The good performance of these techniques is highlighted in the simulation of the cone penetration test in undrained conditions.
Monforte, L., Ciantia, M., Carbonell, J., Arroyo, M., Gens, A. (2021). A Nonlocal Elasto-Plastic Model for Structured Soils at Large Strains for the Particle Finite Element Method. In M. Barla, A. Di Donna, D. Sterpi (a cura di), Challenges and Innovations in Geomechanics Proceedings of the 16th International Conference of IACMAG - Volume 2 (pp. 544-551). Springer Science and Business Media Deutschland GmbH [10.1007/978-3-030-64518-2_64].
A Nonlocal Elasto-Plastic Model for Structured Soils at Large Strains for the Particle Finite Element Method
Ciantia M. O.;
2021
Abstract
This work presents a robust and mesh-independent implementation of an elasto-plastic constitutive model at large strains, appropriate for structured soils, into a Particle Finite Element code specially developed for geotechnical simulations. The constitutive response of structured soils is characterized by softening and, thus, leading to strain localization. Strain localization poses two numerical challenges: mesh dependence of the solution and computability of the solution. The former is mitigated by employing a non-local integral type regularization whereas an Implicit-Explicit integration scheme is used to enhance the computability. The good performance of these techniques is highlighted in the simulation of the cone penetration test in undrained conditions.
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