Dynamic Elastic Modulus and Damping Ratio of Unsaturated Red Clay

Huang, Changxi; Wang, Xinghua; Zhou, Hao; Qin, Da-chao

doi:10.1007/s10706-019-01117-3

Cited by 13 publications

(4 citation statements)

References 11 publications

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“…Figure 6A presents the values of E for different w and confining pressures (σc = σ3), which shows that E decreases as w increases, while the confining pressure values used in this work does not affect E, this corroborates the ANOVA results and agrees with the literature (Huang et al, 2020).…”

Section: Experimental Tests To Determine Mechanical Properties Of the Soilsupporting

confidence: 89%

Experimental and numerical analysis of triaxial compression test for a clay soil

Hernández-Hernández

Joya-Cárdenas

Equihua-Anguiano

et al. 2021

Chil. j. agric. res.

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Soil compaction causes negative effects on crop yield and its mechanical response analysis has recently gained relevance for research through numerical methods. In this work, Finite Element Method (FEM) using the Mohr-Coulomb (MC) and Hardening Soil (HS) constitutive models were employed to simulate the mechanical response of a Vertisol agricultural soil. First, an experimental study of the unconsolidated-undrained (UU) triaxial compression test with different moisture contents (w = 10%, 20% and 34%) and confining pressures (σ3 = σc = 0.05 MPa, 0.10 MPa and 0.15 MPa) was carried out, to obtain the shear strength parameters cohesion (c) and friction angle (φ), as well as the Young's modulus (E) of the soil. The experimental study was conducted through a 3 2 factorial design with three replicates that it was used to evaluate the influence of the w and σc on E of the studied soil. Also, an analysis of the behavior of the φ and c parameters at each w was performed. Numerical simulations were done with similar conditions as the experimental tests with respect to loading and boundary conditions. A comparison of the mechanical response between numerical results and physical experiments was carried out. As a result, the MC model allowed to estimate satisfactorily the stress-strain relationship of the soil for w of 10% and 20%, while HS model exhibited a better approximation for w of 34% in comparison with the MC model. Finally, the methodology and the adjusted parameters of the agricultural soil obtained in this work, can be used in the study of soil compaction produced by the agricultural machinery.

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Section: Experimental Tests To Determine Mechanical Properties Of the Soilsupporting

confidence: 89%

Experimental and numerical analysis of triaxial compression test for a clay soil

Hernández-Hernández

Joya-Cárdenas

Equihua-Anguiano

et al. 2021

Chil. j. agric. res.

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“…Ni et al [12] conducted cyclic loading tests on granite and found that the granite hysteretic loop area, dynamic elastic modulus, and damping ratio increased with frequency increasing. Huang et al [13] found that at the same strain, the dynamic elastic modulus of red clay increases with the increase of surrounding pressure and decreases with the increase of loading frequency. The damping ratio decreases with the increase of the surrounding pressure.…”

Section: Literature Review and Discussionmentioning

confidence: 99%

Dynamic Properties and Dynamic Response Model of Jointed Granites by Cyclic Loading

Ding,

Zhao,

Dong

2024

Advances in Civil Engineering

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The present study investigates the dynamic properties of granite samples with varying degrees of defects through triaxial cyclic loading experiments conducted under different conditions, including varied confining pressures, loading frequencies, dynamic stress amplitudes, and number of cycles, and the dynamic response model of granite samples influenced by the confining pressure and frequency are constructed. The results show that the dynamic elastic modulus of granite increases, but its dynamic damping ratio decreases as the confining pressure increases. The dynamic elastic modulus and dynamic damping ratio of the granite increase as increasing frequency. The dynamic elastic modulus of granite increases with the increasing dynamic stress amplitude while its dynamic damping ratio decreases. The dynamic elastic modulus and dynamic damping ratio of granite decreases with an increasing number of cycles. The modified Duncan–Chang model can well describe the dynamical behavior of granite influenced by the confining pressure and frequency. The correlation coefficients of the modified model reached 0.98. It is worth saying that the correlation coefficient of the model is low at 20 Hz frequency. It indicates that frequency has a strong effect on the dynamic response of granite compared with the confining pressure. These data and models will be applied to the next step of detection and prediction of the tunnel rock stress state.

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“…The attenuation law of the dynamic elastic modulus under different compactness is classified in Equation (2). Further, the summary data are shown in Table 4.…”

Section: Based On Compactnessmentioning

confidence: 99%

“…The most widely used method is to analyze the attenuation law of the dynamic elastic modulus of red clay using indoor dynamic triaxial tests. It has been found that the dynamic elastic modulus of remodeled red clay increases with the increase in compactness and confining pressure [1][2][3], and that increasing the compactness and the confining pressure can significantly improve the deformation resistance of red clay [3]. This dynamic elastic modulus of remodeled red clay is exponentially proportional to the dynamic stress [3].…”

Section: Introductionmentioning

confidence: 99%

Experiments and Modeling of the Attenuation of the Dynamic Elastic Modulus of Saturated Red Clay under Cyclic Loading

Zhuang

Chen³

et al. 2022

Sustainability

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Due to the long-term effect of cyclic traffic loads, the accumulated deformation of red clay subgrades is increasing, strength is decreasing, and problems such as uneven settlement are occurring. In order to improve the stability and durability of red clay subgrade, this paper analyzes the effects of cyclic stress ratios and compactness on the development of the dynamic elastic modulus of saturated red clay. This is achieved through dynamic triaxial tests on red clay in the Qingyuan County, Zhejiang Province, China. The results show that the saturated red clay has an attenuation threshold cyclic stress ratio under cyclic loading. The attenuation threshold cyclic stress ratio prediction models were constructed based on the confining pressure and compactness, respectively. By introducing the concept of a relative cyclic stress ratio, the prediction model of the dynamic elastic modulus of saturated red clay (as based on cyclic vibration times and close cyclic stress ratio) is constructed. The model realizes the prediction of the dynamic elastic modulus of red clay under arbitrary cyclic vibration times via the initial cyclic stress ratio, compactness, and other parameters. It provides a theoretical basis for rationally evaluating the dynamic stability of red clay subgrade under cyclic loading.

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Dynamic Elastic Modulus and Damping Ratio of Unsaturated Red Clay

Cited by 13 publications

References 11 publications

Experimental and numerical analysis of triaxial compression test for a clay soil

Experimental and numerical analysis of triaxial compression test for a clay soil

Dynamic Properties and Dynamic Response Model of Jointed Granites by Cyclic Loading

Experiments and Modeling of the Attenuation of the Dynamic Elastic Modulus of Saturated Red Clay under Cyclic Loading

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