Simulating the dynamic behavior and energy consumption characteristics of frozen sandy soil under impact loading

Fu, Tiantian; Zhu, Zhiwu; Cao, Chenxu

doi:10.1016/j.coldregions.2019.102821

Cited by 14 publications

(4 citation statements)

References 52 publications

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“…The striker was made of 35CrMNSi steel, whose elastic modulus, Poisson’s ratio, and density were 210 GPa, 0.3, and 7800 kg/m 3 , respectively (Fu et al., 2019a). The incident bar and transmission bar were 7075-T6 aluminum alloys, whose elastic modulus, Poisson’s ratio, and density were 71 GPa, 0.3, and 2810 kg/m 3 , respectively (Fu et al., 2019a). In accordance with Zhang et al.…”

Section: Methodsmentioning

confidence: 99%

“…The striker was made of 35CrMNSi steel, whose elastic modulus, Poisson's ratio, and density were 210 GPa, 0.3, and 7800 kg/m 3 , respectively (Fu et al, 2019a). The incident bar and transmission bar were 7075-T6 aluminum alloys, whose elastic modulus, Poisson's ratio, and density were 71 GPa, 0.3, and 2810 kg/m 3 , respectively (Fu et al, 2019a). In accordance with Zhang et al (2021), a wedge with high stiffness and a copper sheet were added in the experiment as a pulse shaper, which can not only generate incident waves with high amplitudes and long rising edges but also protect the end of the incident bar.…”

Section: Experimental Setup and Preparation Of Frozen Soil Specimensmentioning

confidence: 99%

“…The evolution of cracks in frozen soil subjected to impact loading is difficult to observe, indicating that describing the weakening effect of every crack on its mechanical properties is unrealistic (Fu et al, 2019a). Although combining conventional experiments with some hypotheses and theories can reasonably predict the evolution of internal damage during failure (Cao et al, 2018;Fu et al, 2019aFu et al, , 2021Li et al, 2022;Ma et al, 2017), current research remains illegible or unintuitive for investigating the influence of impact loading and temperature on initiation and propagation of crack. Numerical simulations can be utilized to reconstruct the process of initiation and propagation of crack in frozen soil under impact loading.…”

Section: Introductionmentioning

confidence: 99%

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Numerical simulation research on impact mechanical properties of frozen soil based on discrete element method

Chunyu

Zhu

et al. 2022

International Journal of Damage Mechanics

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Many engineering activities have been conducted on permafrost. Frozen soil is subjected to impact loading, particularly during blasting and excavation projects. Thus, it is essential to study the impact mechanical properties of frozen soil. A split Hopkinson pressure bar (SHPB) experiment was conducted to investigate the mechanical responses of frozen soil specimens subjected to impact loading under different strain rates at different temperatures. Evident strain rate and temperature effects were also observed. As crack development in the specimens could not be observed experimentally, a two-dimensional particle flow code was utilized to numerically simulate SHPB impact experiments on frozen soil. A contact bonding model was used for the simulation. We assumed that only temperature could change the particle parameters. The parameters and establishment of the geometric model in the simulation were calibrated and validated by comparing them with the experimentally obtained impact stress–strain curves and wave signals. More influences of strain rate and temperature on crack development were presented intuitively in this study, in combination with the propagation of stress waves. The results of the numerical simulation demonstrated that when the frozen soil specimen was subjected to impact loading, shear failure was the primary failure in the specimen. For a given temperature, a lower strain rate decreased the number of cracks generated, increased the duration of crack generation, and delayed the formation of cracks. For a given strain rate, a lower temperature decreased the number of cracks generated and the duration of crack generation; however, the number of tensile cracks was negligibly affected by changes in temperature.

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Section: Methodsmentioning

confidence: 99%

Section: Experimental Setup and Preparation Of Frozen Soil Specimensmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Numerical simulation research on impact mechanical properties of frozen soil based on discrete element method

Chunyu

Zhu

et al. 2022

International Journal of Damage Mechanics

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“…Lv et al [15] proposed a model to quantify the impact of strain rate, relative density, and water content on the fragmentation rate of porous angular calcareous sand, focusing on its fractal characteristics under impact loading. Additionally, a few cases have reported on the dynamic mechanical response of kaolinite [16], frost-expanded soils [17][18][19], and loess [20].…”

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confidence: 99%

Stress wave propagation characteristics and energy dissipation effects in sandy soil

CUI,

SU,

LIU

et al. 2024

Preprint

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To investigate the energy attenuation law and propagation velocity of stress waves in sandy soil material, this paper focuses on the dynamic response of stress waves in a specimen under both single impact and repetitive impact conditions. The improved split Hopkinson pressure bar (SHPB) system is utilized for this purpose. The results reveal that the length of the specimen follows an exponential function relationship with the attenuation of peak stress. As the length of the specimen increases from 40 mm to 240 mm, the attenuation rate of peak stress increases from 26.3–99.0%. The velocity of peak stress decreases with the increase in specimen length, indicating a correlation between these two factors. Furthermore, the impact test results show that the number of impacts and the density of the specimen affect the attenuation of the stress wave. As the number of impacts increases, the density of the specimen also increases, resulting in a gradual decrease in the degree of stress wave attenuation. When the density increases from 1.60 g·cm− 3 to 2.29 g·cm− 3, the attenuation of the stress wave decreases by 17.0%, and the energy absorption density increases from 0.241 MJ·m− 3 to 1.172 MJ·m− 3, representing a 386.3% increase. Additionally, the study finds that the energy absorption efficiency decreases with the increase in the number of impacts at the same stress level. However, after two impacts, the energy absorption efficiency approaches a steady state. At the same strain level, the energy absorption efficiency remains consistent, indicating the material's energy dissipation characteristics.

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Dynamic Deformation of Frozen Soil at a High Strain Rate: Experiments and Damage-Coupled Constitutive Model

Zhu

Tang

Kang

2021

Acta Mech. Solida Sin.

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Simulating the dynamic behavior and energy consumption characteristics of frozen sandy soil under impact loading

Cited by 14 publications

References 52 publications

Numerical simulation research on impact mechanical properties of frozen soil based on discrete element method

Numerical simulation research on impact mechanical properties of frozen soil based on discrete element method

Stress wave propagation characteristics and energy dissipation effects in sandy soil

Dynamic Deformation of Frozen Soil at a High Strain Rate: Experiments and Damage-Coupled Constitutive Model

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