Abstract
Split Hopkinson pressure bars (SHBP) were used to perform impact experiments on frozen soil under various impact velocities and temperatures to analyze the effect of these parameters on the mechanical behavior of the soil. Based on the Holmquist-Johnson-Cook constitutive model, the dynamic mechanical properties under impact loading were analyzed. The SHPB experiments of frozen soil were also simulated using the finite element analysis software LS-DYNA, and the simulation results were similar to the experimental results. The temperature effect, strain rate effect, and the destruction process of the frozen soil as well as the propagation process of stress waves in the incident bar, transmission bar, and frozen soil specimen were investigated. This work provides a good theoretical basis and technical support for frozen soil engineering applications.
Highlights
Frozen soil, a porous complex material, consists of mineral grains, water, ice inclusions, and gas inclusions; the essential difference between frozen soil and melted soil is the presence of ice
Frozen soil is widely distributed on the Earth’s surface; a series of major construction projects will be performed in permafrost regions, and strong dynamic loadings will affect the structures of frozen soil
The split Hopkinson pressure bar (SHPB) method has played a significant role in the dynamic testing of materials
Summary
A porous complex material, consists of mineral grains, water, ice inclusions, and gas inclusions (moisture and air); the essential difference between frozen soil and melted soil is the presence of ice. Chen et al [1] studied the dynamic brittle and frozen brittle behavior of frozen soil and observed oscillation and convergence of the strain-stress curves. Ma et al [3, 4] studied the dynamic behavior of artificial frozen soil, which showed a dependence on both the temperature and strain rate. A comparison of the stress-strain curve obtained from the SHPB test with the reconstructed curve from the numerical simulation revealed similar mechanical behavior. The failure process of rock subjected to combined static and dynamic loading in SHPB tests was numerically simulated by Zhu et al [10], and the strength increase factor under combined static and dynamic loading could be predicted. Using the finite element software LS-DYNA, the effects of the temperature and loading strain rate on the dynamic mechanical properties of frozen soil were investigated, and. Proportion/% 32 the dynamic failure mode of frozen soil under impact loading was discussed
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
