Modelling of fall-cone tests with strain-rate effects
Paper in proceedings, 2017

© 2017 The Authors. Published by Elsevier Ltd.Material Point Method (MPM) is a numerical method, which is well suited for large displacement simulations. Large displacements problems are relatively common in geotechnics, including post-failure behaviour of landslides as well as a wide range of problems involving penetration into the soil body. One of those problems is the fall-cone test, commonly used to establish the undrained shear strength and the sensitivity of saturated fine grained soils. This paper shows a Generalized Interpolation Material Point Method (GIMP) simulation replicating published free-fall cone experiment performed on a kaolin clay. In the fall-cone tests, the penetration characteristics of the cone, such as velocity and total penetration depth depend on the soil properties. Those properties are affected greatly by the strain-rate which must be accounted for in a numerical simulation. Hence, the simulations shown uses a Mohr-Coulomb / Tresca material extended with strain-rate effects. The presentednumerical simulations are compared with the published fall-cone experiment in whichdisplacement and force were measured. The comparison indicates that Generalized Interpolation Material Point Method and Mohr-Coulomb / Tresca model extended with strain-rate effects areableto replicate the fall-cone penetration test very well.

generalized interpolation material point method

fallcone test

strain rate effects

Author

Q.A. Tran

Aalto University

W. Solowski

Aalto University

Minna Karstunen

Chalmers, Civil and Environmental Engineering, GeoEngineering

L. Korkiala-Tanttu

Aalto University

Procedia Engineering

18777058 (ISSN)

Vol. 175 293-301

Areas of Advance

Building Futures (2010-2018)

Subject Categories

Geotechnical Engineering

DOI

10.1016/j.proeng.2017.01.029

More information

Latest update

3/19/2018