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Continuum Modeling of Partially Saturated Soils

  • Biswajit Banerjee
  • Rebecca BrannonEmail author
Chapter
Part of the Shock Wave and High Pressure Phenomena book series (SHOCKWAVE)

Abstract

Essential features in continuum-scale models for sand and/or clay under high-rate loading conditions are summarized. The scope of this chapter is limited to adiabatic load/unload conditions in order to focus on model features that are most crucial for simulations of buried explosives and similar phenomena that involve shock compression followed by free expansion (possibly with recompression when ejecta impacts an object). Evidence is provided that such conditions fall in a realm for which there is expected to be no substantial difference between additive and multiplicative inelasticity approaches. A new constitutive model, Arena, for fully and partially saturated soils is presented and validated with split-Hopkinson pressure bar experiments. Similarities of the presented cap-plasticity model with quasistatic critical-state theories are briefly mentioned. Simplifying assumptions for a tractable and robust computational model, as well as avenues for further research, are identified. Though the model is calibrated with data that is largely from quasistatic experiments on dry soils it is found to perform remarkably well in predicting the behavior of partially saturated Colorado Mason sand at high strain rates, with mild discrepancies typical of what can be handled via conventional viscoplasticity enhancement.

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© Springer Nature Switzerland AG 2019

Authors and Affiliations

  1. 1.Parresia Research LimitedAucklandNew Zealand
  2. 2.University of UtahSalt Lake CityUSA

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