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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The financial support of the Ministry of Science and Innovation of Spain through research grant BIA2017–84752-R is gratefully appreciated.
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Monforte, L., Ciantia, M.O., Carbonell, J.M., Arroyo, M., Gens, A. (2021). A Nonlocal Elasto-Plastic Model for Structured Soils at Large Strains for the Particle Finite Element Method. In: Barla, M., Di Donna, A., Sterpi, D. (eds) Challenges and Innovations in Geomechanics. IACMAG 2021. Lecture Notes in Civil Engineering, vol 126. Springer, Cham. https://doi.org/10.1007/978-3-030-64518-2_64
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