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Granular Matter

, 19:37 | Cite as

Numerical modelling of the NGI-DSS test and cyclic threshold shear strain for degradation in sand

  • Vedran Pavlic
  • Leo Matesic
  • Predrag Kvasnicka
Original Paper
  • 232 Downloads

Abstract

Ability of laboratory determination of a sand behaviour in static and dynamic loading conditions are influenced by (among other things): sample preparation, number of tests, size of strains, speed of loading and averaging of the errors during examination. Dynamic load per se causes accumulation of the pore water pressure and the phenomenon of stiffening-threshold-degradation which makes the understanding of the sand behaviour more difficult. The complex behaviour of granular material, i.e. sand, is caused by chemical and physical properties of individual particles and their mutual interaction. Obviously, these interrelationships could not be analysed on the basis of laboratory testing. One way to analyse it is numerically, with algorithm that takes into consideration the characteristics of individual particles as well as their interaction in the sand matrix. Discrete element method (DEM) is a numerical method which takes into consideration the discrete nature of sand and shape of particles and is used as an elementary research tool for sand behaviour. Program package PFC3D is based on DEM and allows the modelling of the laboratory equipment, materials and calibration of its micro-characteristics, based on experimental results. The research of cyclic threshold shear strain for degradation in sand includes observation and visualization of the sample preparation (creation of the material skeleton), pouring of the material (transition from liquid to meta-stable state), influence of the particle shape (interlocking, arching), consolidation (deformation of the skeleton) and development and braking of force chains through the sample. This paper explores the suitability of the selected numerical method for modelling of NGI-DSS device, calibration of the tested granular material (Nevada sand) and preparation of the sample for testing and presentation of the stiffening-threshold-degradation phenomenon.

Keywords

DEM Nevada sand Simple shear test Particle shape Sample preparation Threshold 

Notes

Acknowledgements

The author Vedran Pavlic is a recipient of the Itasca Education Partnership program and the use of Itasca codes including PFC3D. We are grateful for their support. We thank Mladen Vucetic and Ahmad Reza Mortezaie for providing us with the results of experimental testing. The contribution of Research Centre for Metal Industry in the Istrian County - MET.R.IS is also gratefully acknowledged.

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.

References

  1. 1.
    Barret, P.J.: The shape of rocks particles, a critical review. Sedimentology 27, 291–303 (1980)ADSCrossRefGoogle Scholar
  2. 2.
    Bhushan, B., Israelachvili, J.N., Landman, U.: Nanotribology: friction, wear and lubrication at the atomic scale. Nature 374, 607–616 (1995)ADSCrossRefGoogle Scholar
  3. 3.
    Cavarretta, I.: The influence of particle characteristics on the engineering behaviour of granular materials. Ph.D. thesis, Imperial College London, London (2009)Google Scholar
  4. 4.
    Cho, G.C., Dodds, J., Santamarina, J.C.: Particle shape effects on packing density, stiffness, and strength: natural and crushed sands. J. Geotech. Eng. ASCE 132(5), 591–602 (2006)CrossRefGoogle Scholar
  5. 5.
    Cieplak, M., Smith, E.D., Robbins, M.O.: Molecular origins of friction: the force on adsorbed layers. Science 265, 1209–1212 (1994)ADSCrossRefGoogle Scholar
  6. 6.
    Cundall, P.A., Strack, O.D.L.: A discrete numerical model for granular assemblies. Geotechnique 29(1), 47–65 (1979)CrossRefGoogle Scholar
  7. 7.
    Dobry, R., Ladd, R.S., Yokel, F.Y., Chung, R.M., Powell, D.: Prediction of Pore Water Pressure Buildup and Liquefaction of Sands During Earthquakes by the Cyclic Strain Method, vol. 138. NBS BSS, Gaithersburg (1982)Google Scholar
  8. 8.
    Drnevich, V.P., Richart, F.E.: Dynamic prestraining of dry sand. J. Soil Mech. Found. Div. Proc. ASCE 96(SM2), 453–469 (1970)Google Scholar
  9. 9.
    Dyvik, R., Dobry, R., Thomas, G.E., Pierce, W.G.: Influence of Consolidation Shear Stresses and Relative Density on Threshold Strain and Pore Pressure During Cyclic Straining of Saturated Sand. Department of Civil Engineering, Rensselaer Polytechnic Institute, Troy, NY (1984)Google Scholar
  10. 10.
    Frankowski, P., Morgeneyer, M.: Calibration and validation of DEM rolling and sliding friction coefficients in angle of repose and shear measurements. Powders Grains AIP 1542, 851–854 (2013)Google Scholar
  11. 11.
    Giesbers, J.: Contact mechanics in MSC Adams—a technical evaluation of the contact models in multibody dynamics software MSC Adams. B.S. thesis, University of Twente, Enschede (2012)Google Scholar
  12. 12.
    Itasca: PFC Version 5.0 Documentation. Minneapolis (2014)Google Scholar
  13. 13.
    Jaeger, H.M., Nagel, S.R., Behringer, R.P.: The Physics of granular materials. Phys. Today AIP 49, 32–38 (1996)CrossRefGoogle Scholar
  14. 14.
    Krim, J.: Surface science and the atomic-scale origins of friction: what once was old is new again. Surf. Sci. 500, 741–758 (2002)ADSCrossRefGoogle Scholar
  15. 15.
    Mortezaie, A.R.: Cyclic threshold strains in clays versus sands and the change of secant shear modulus and pore water pressure at small cyclic strains. Ph.D. thesis, University of California, Los Angeles (2012)Google Scholar
  16. 16.
    Ng, T.-T., Dobry, R.: Numerical simulations of monotonic and cyclic loading of granular soil. J. Geotech. Eng. ASCE 120(2), 388–403 (1994)CrossRefGoogle Scholar
  17. 17.
    Olejnikova, T.: Cyclical surfaces created by conical helix. KOG CSGG 11, 33–38 (2007)MathSciNetzbMATHGoogle Scholar
  18. 18.
    O’Sullivan, C.: Particulate Discrete Element Modelling: A Geomechanics Perspective. Spon Press, London (2011)Google Scholar
  19. 19.
    Pavlic, V.: Project Proposal: Numerical Modelling of the NGI DSS Test and Cyclic Threshold Shear Strain for Degradation in Sand. IEP, Minneapolis (2013)Google Scholar
  20. 20.
    Poschel, T., Schwager, T.: Computational Granular Dynamics: Models and Algorithms. Springer, Berlin (2005)Google Scholar
  21. 21.
    Potyondya, D.O., Cundall, P.A.: Abonded-particle model for rock. Int. J. Rock Mech. Min. Sci. 41, 1329–1364 (2008)CrossRefGoogle Scholar
  22. 22.
    Shen, C.K., Sadigh, K., Herrman, L.R.: An analysis of NGI simple shear apparatus for cyclic soil testing. Dyn. Geotech. Test. ASTM STP 654, 148–162 (1977)Google Scholar
  23. 23.
    Tabata, K., Vucetic, M.: Threshold shear strain for cyclic degradation of three clays. In: Fifth International Conference on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics and Symposium in Honor of Professor I.M. Idriss (2010)Google Scholar
  24. 24.
    Tabor, D.: Friction as a dissipative process. In: Singer, I.L., Pollack, H.M. (eds.) Fundamentals of Friction: Macroscopic and Microscopic Processes, pp. 3–24. Kluwer, Dordrecht (1992)CrossRefGoogle Scholar
  25. 25.
    Travers, T., Ammi, M., Bideau, D., Gervois, A., Messager, J.C., Troadec, J.P.: Mechanical size effects in 2D granular media. J. Phys. Fr. 49, 939–948 (1988)Google Scholar
  26. 26.
    Vucetic, M.: An evaluation of laboratory testing techniques in soil mechanics. Soils Found. JSSMFE 24(2), 112–117 (1984)MathSciNetGoogle Scholar
  27. 27.
    Vucetic, M., Mortezaie, A.: Cyclic secant shear modulus versus pore water pressure in sands at small cyclic strains. Soils Dyn. Earthq. Eng. 70, 60–72 (2015)CrossRefGoogle Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 2017

Authors and Affiliations

  1. 1.MalinskaCroatia
  2. 2.Faculty of Civil EngineeringUniversity of Rijeka and Geokon-Zagreb JSCZagrebCroatia
  3. 3.GEO-DINAMIKA LLCZagrebCroatia

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