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 400–1000s−1 and different temperatures (i.e., −3, −8, −18, and −28°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. •We use SHPB device conducted dynamic experiments on frozen soil.•We studied dynamic mechanical properties of frozen soil at different temperatures.•We propose a new idea to establish the dynamic constitutive model of frozen soil.•The idea can apply to establish dynamic constitutive model of other materials.•This model is suitable for high strain rates.