Dynamic stress–strain behavior of frozen soil: Experiments and modeling

The dynamic stress-strain behavior of artificial frozen soil (with a moisture content of 30%) was tested using a split Hopkinson pressure bar (SHPB) under various impact compressive loading conditions. The tests were performed at strain rates 400-1000 s(-1) and different temperatures (i.e., -3, -8, -18, and -28 degrees C). The experimental results show that the dynamic stress-strain responses of the artificial frozen soil exhibit a positive strain rate sensitivity and negative temperature dependence. An energy-based dynamic constitutive model was constructed to simulate the dynamic stress-strain behavior of the frozen soil. It is shown that the proposed model can describe the positive strain-rate sensitivity and negative temperature dependence of the artificial frozen soil reasonably, and predict the dynamic stress-strain curves of the frozen soil well. (C) 2014 Elsevier B.V. All rights reserved.

[1]  Mamoru Mabuchi,et al.  Experimental study of energy absorption in a close-celled aluminum foam under dynamic loading , 1999 .

[2]  Mingyi Zhang,et al.  Seismic Analysis of Embankment of Qinghai–Tibet Railway , 2009 .

[3]  Li-Li Wang,et al.  Foundations of Stress Waves , 2007 .

[4]  Jinyu Xu,et al.  Impact characterization of basalt fiber reinforced geopolymeric concrete using a 100-mm-diameter split Hopkinson pressure bar , 2009 .

[5]  M. Wei.  State-of-art of research on mechanical properties of frozen soils , 2010 .

[6]  Ma Qin-yong,et al.  Research status of dynamic properties of artificial frozen soil and its significance , 2009 .

[7]  Shi-jun Chen,et al.  Experimental investigation on the train-induced subsidence prediction model of Beiluhe permafrost subgrade along the Qinghai–Tibet Railway in China , 2010 .

[8]  N. A. T︠S︡ytovich.  The mechanics of frozen ground , 1975 .

[9]  Hugh M. French,et al.  The Periglacial Environment , 1977 .

[10]  Q. Ma.  Experimental analysis of dynamic mechanical properties for artificially frozen clay by the split Hopkinson pressure bar , 2010 .

[11]  D. R. Bronowski,et al.  Frozen Soil Material Testing and Constitutive Modeling , 2002 .

[12]  D. Steinberg,et al.  A constitutive model for metals applicable at high-strain rate , 1980 .

[13]  G. Kang,et al.  Dynamic behavior of frozen soil under uniaxial strain and stress conditions , 2013 .

[14]  D. Agard,et al.  Microtubule nucleation by γ-tubulin complexes , 2011, Nature Reviews Molecular Cell Biology.