A dynamic meso-constitutive model of frozen soil based on ice particulate-reinforced material

A constitutive model based on ice particulate-reinforced material is developed to visually describe the dynamic mechanical properties and the stress-strain relationship of frozen soil. In view of the fact that soil breaks layer by layer under impact loading, we brought the strain rate into consideration as an important factor in constructing the model by assuming that the dynamic modulus of soil changes with strength decreasing step by step. A split Hopkinson pressure bar (SHPB) was used to test the dynamic mechanical response of frozen soil at different temperatures and high strain rates. The experimental results show that frozen soil produces an obvious strain rate effect and temperature effect, and are in good agreement with the theoretical analysis, verifying the constitutive model as both valid and applicable and having significant application value in engineering.