A Dynamic Micromechanical Constitutive Model for Frozen Soil under Impact Loading

Xie, Qijun; Zhu, Zhiwu; Kang, Guozheng

doi:10.1016/s0894-9166(16)60003-4

Cited by 32 publications

(29 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As shown in Fig. 1, frozen soil undergoes a nonlinear deformation under external load, even in the initial stages [1][2][3][4][5][6][7][8][9][10][11] .…”

Section: There Is Good Agreements Between the Results Based On This Nmentioning

confidence: 99%

Dynamic constitutive model of frozen soil that considers the evolution of volume fraction of ice

Xie

Zhu

2020

Sci Rep

Self Cite

View full text Add to dashboard Cite

A new constitutive model for frozen soils under high strain rate is developed. By taking the frozen soil as a composite material and considering the adiabatic temperature rise and interfacial debonding damage, the nonlinear dynamic response (NDR) of the frozen soil is predicted. At the same time, the relationship between instantaneous temperature and unfrozen water content is given, and an evolution rule of the volume fraction of ice particles is obtained. This relationship shows good agreement with experimental data. Using this new constitutive model, the stress–strain relationship of frozen soil under impact loading at temperatures of − 3 °C, − 8 °C, − 18 °C, and − 28 °C is calculated. There is good agreements between the results based on this new constitutive model and the data of dynamic impact.

show abstract

“…As shown in Fig. 1, frozen soil undergoes a nonlinear deformation under external load, even in the initial stages [1][2][3][4][5][6][7][8][9][10][11] .…”

Section: There Is Good Agreements Between the Results Based On This Nmentioning

confidence: 99%

Dynamic constitutive model of frozen soil that considers the evolution of volume fraction of ice

Xie

Zhu

2020

Sci Rep

Self Cite

View full text Add to dashboard Cite

show abstract

“…erein, on the basis of Z-W-T model, Ma et al [17,18] and Zhang et al [19] introduced the statistical damage theory or used the longitudinal wave velocity to define the damage variable and established the damage dynamic constitutive relation of frozen soil considering the temperature effect. Furthermore, Xie et al [20] built a micromechanical constitutive model to describe the dynamic compressive deformation of frozen soil and proved the model well reflects the experimental results of frozen soil at different high strain rates and temperatures. Zhang et al [21] analyzed the dynamic mechanical properties of frozen soil based on HJC constitutive model and used LS-DYNA to simulate the results.…”

Section: Introductionmentioning

confidence: 90%

“…It shows an obvious segmental character and can be divided into four stages: nonlinear compaction stage, linear elastic stage, plastic development stage, and rapid failure stage. is type of sandstone shows obvious initial nonlinear compaction characteristics in statics [19][20][21]. However, the proportion of the nonlinear compression segment is very small in the dynamics, which is basically not shown in the stress-strain curves.…”

Section: Stress-strain Curve Analysismentioning

confidence: 99%

Study on Dynamic Constitutive Model of Weakly Consolidated Soft Rock in Western China

Wang

Qin

et al. 2020

Shock and Vibration

View full text Add to dashboard Cite

To obtain the impact mechanical response and establish the dynamic damage constitutive relationship of frozen sandstone at low temperature conditions, the impact test of Cretaceous red sandstone under different temperatures was conducted using a split Hopkinson pressure bar (SHPB) device. According to the characteristics of the stress-strain curves obtained by the test, a constitutive model considering the damage effect, temperature effect, and strain rate effect was established, which was improved by Zhu–Wang–Tang (Z–W–T) constitutive model. It was proved that the fitting curves of constitutive equation were in good agreement with the test curves. The fluctuation amplitude of fitting error was controlled within ±4 MPa. The physical meaning of each parameter of the constitutive model is clear, and most of them are fixed values. The selection range of variable parameters and the related change rules are confirmed, which improves the practicability of constitutive model. The constitutive equation can well describe the nonlinear features of this kind of frozen sandstone under impact loading. It was also found that the constitutive equation was applicable to express the dynamic mechanical properties of rock-like materials such as hard rock, soft rock, frozen soil, raw coal, and concrete. It can be referred to the parameter determination method in this paper to study and determine the parameters, reduce the difficulty of parameter selection, and improve the practicability of the constitutive model and parameters, so as to guide the engineering practice better.

show abstract

“…e length of incident bar, transmitted bar, and buffer bar are 2000 mm, 1500 mm, and 500 mm, respectively, and the diameters of them are 50 mm. e test procedure is as follows: (1) put artificial frozen soil specimen between the incident bar and transmitted bar; (2) apply axial precompressive stress to the test specimen; (3) close the oil pipe when the value of axial precompressive stress reaches the predetermined value; (4) open launch device and make the striker impact the incident bar.…”

Section: Artificial Frozen Soil Specimen Preparationmentioning

confidence: 99%

“…Moreover, effects of freezing temperature, water content, and strain rate on dynamic stress-strain relationships, strength characteristic, and failure modes are studied experimentally and numerically [4][5][6][7][8]. Previous studies indicate that the dynamic compressive strength of frozen soil increases with the increase of strain rate and the decrease of freezing temperature [4][5][6]. In addition, studies show that stress state has significant effect on dynamic mechanical property of frozen soil [7,8].…”

Section: Introductionmentioning

confidence: 99%

Dynamic Mechanical Properties and Failure Mode of Artificial Frozen Silty Clay Subject to One‐Dimensional Coupled Static and Dynamic Loads

Yao

et al. 2019

Advances in Civil Engineering

View full text Add to dashboard Cite

The dynamic stress-strain relationship of artificial frozen silty clay under one-dimensional coupled static and dynamic loads is obtained using modified split Hopkinson pressure bar (SHPB) equipment. The variation in dynamic compressive strength, dynamic deformation modulus, energy dissipation, and failure mode of artificial frozen silty clay with axial precompressive stress ratio are studied in this research. Experimental results indicate that the dynamic stress-strain curves under uniaxial state and one-dimensional coupled static and dynamic loads can be divided into four stages, i.e., compaction stage, elastic stage, plastic stage, and failure stage. The dynamic compressive strength, first-stage deformation modulus, second-stage deformation modulus, and absorbed energy density of artificial frozen silty clay present a trend of first increase and then decrease with the increase of axial compressive stress ratio, and the axial compressive stress ratio corresponding to the peak value is 0.7 in this test. In addition, there is a very similar effect of axial precompressive stress ratio on dynamic compressive strength and second-stage deformation modulus of artificial frozen silty clay. At 0.4 axial compressive stress ratio, spall phenomenon appears at circumferential direction and center position of the frozen soil specimen has no obvious failure. Shear failure appears at 0.7 to 0.9 axial compressive stress ratio, and the larger the axial compressive stress ratio applies, the more obvious the shearing surface appears; moreover, comminution failure mode appears at 1.0 axial compressive stress ratio.

show abstract

A Dynamic Micromechanical Constitutive Model for Frozen Soil under Impact Loading

Cited by 32 publications

References 9 publications

Dynamic constitutive model of frozen soil that considers the evolution of volume fraction of ice

Dynamic constitutive model of frozen soil that considers the evolution of volume fraction of ice

Study on Dynamic Constitutive Model of Weakly Consolidated Soft Rock in Western China

Dynamic Mechanical Properties and Failure Mode of Artificial Frozen Silty Clay Subject to One‐Dimensional Coupled Static and Dynamic Loads

Contact Info

Product

Resources

About