The Experts below are selected from a list of 306 Experts worldwide ranked by ideXlab platform
J Bai - One of the best experts on this subject based on the ideXlab platform.
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effects of wetting drying cycles on strain stress relationship from Triaxial Test of a mudstone mixture
Geotechnical and Geological Engineering, 2019Co-Authors: Junjie Wang, Minnan Liu, Zhenfeng Qiu, Huiping Zhang, J BaiAbstract:Soils filled in or along bank of a large reservoir may be subjected to wetting–drying cycles induced by cyclic lowering and rising of reservoir water level. The wetting–drying cycles may affect the mechanical behaviors of the soils. This study focused on the effects of wetting–drying cycles on the strain–stress relationship from Triaxial Test of a mudstone mixture. Several consolidated drained Triaxial Tests with wetting–drying cycles were carried out. Experimental data indicates that the wetting–drying cycles may induce an increment of axial strain, Δe, and a decrement of deviator stress, Δ(σ1 − σ3). With increment of the number of cycles, N, the values of Δe and Δ(σ1 − σ3) are increasing along logarithmic curves. Both change rates of Δe and Δ(σ1 − σ3) are sharply dropping with increment of N value. Thus, the effects of wetting–drying cycles on the strain–stress relationship of Test material are mainly concentrated on the period of first several cycles. Based on experimental data, several fitting equations, which may estimate the values of Δe, Δ(σ1 − σ3), change rates of Δe and Δ(σ1 − σ3), with increment of N value, were suggested.
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Effects of Wetting–Drying Cycles on Strain–Stress Relationship from Triaxial Test of a Mudstone Mixture
Geotechnical and Geological Engineering, 2018Co-Authors: Junjie Wang, Zhenfeng Qiu, Huiping Zhang, Liu Minnan, J BaiAbstract:Soils filled in or along bank of a large reservoir may be subjected to wetting–drying cycles induced by cyclic lowering and rising of reservoir water level. The wetting–drying cycles may affect the mechanical behaviors of the soils. This study focused on the effects of wetting–drying cycles on the strain–stress relationship from Triaxial Test of a mudstone mixture. Several consolidated drained Triaxial Tests with wetting–drying cycles were carried out. Experimental data indicates that the wetting–drying cycles may induce an increment of axial strain, Δe, and a decrement of deviator stress, Δ(σ1 − σ3). With increment of the number of cycles, N, the values of Δe and Δ(σ1 − σ3) are increasing along logarithmic curves. Both change rates of Δe and Δ(σ1 − σ3) are sharply dropping with increment of N value. Thus, the effects of wetting–drying cycles on the strain–stress relationship of Test material are mainly concentrated on the period of first several cycles. Based on experimental data, several fitting equations, which may estimate the values of Δe, Δ(σ1 − σ3), change rates of Δe and Δ(σ1 − σ3), with increment of N value, were suggested.
Junjie Wang - One of the best experts on this subject based on the ideXlab platform.
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effects of wetting drying cycles on strain stress relationship from Triaxial Test of a mudstone mixture
Geotechnical and Geological Engineering, 2019Co-Authors: Junjie Wang, Minnan Liu, Zhenfeng Qiu, Huiping Zhang, J BaiAbstract:Soils filled in or along bank of a large reservoir may be subjected to wetting–drying cycles induced by cyclic lowering and rising of reservoir water level. The wetting–drying cycles may affect the mechanical behaviors of the soils. This study focused on the effects of wetting–drying cycles on the strain–stress relationship from Triaxial Test of a mudstone mixture. Several consolidated drained Triaxial Tests with wetting–drying cycles were carried out. Experimental data indicates that the wetting–drying cycles may induce an increment of axial strain, Δe, and a decrement of deviator stress, Δ(σ1 − σ3). With increment of the number of cycles, N, the values of Δe and Δ(σ1 − σ3) are increasing along logarithmic curves. Both change rates of Δe and Δ(σ1 − σ3) are sharply dropping with increment of N value. Thus, the effects of wetting–drying cycles on the strain–stress relationship of Test material are mainly concentrated on the period of first several cycles. Based on experimental data, several fitting equations, which may estimate the values of Δe, Δ(σ1 − σ3), change rates of Δe and Δ(σ1 − σ3), with increment of N value, were suggested.
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Effects of Wetting–Drying Cycles on Strain–Stress Relationship from Triaxial Test of a Mudstone Mixture
Geotechnical and Geological Engineering, 2018Co-Authors: Junjie Wang, Zhenfeng Qiu, Huiping Zhang, Liu Minnan, J BaiAbstract:Soils filled in or along bank of a large reservoir may be subjected to wetting–drying cycles induced by cyclic lowering and rising of reservoir water level. The wetting–drying cycles may affect the mechanical behaviors of the soils. This study focused on the effects of wetting–drying cycles on the strain–stress relationship from Triaxial Test of a mudstone mixture. Several consolidated drained Triaxial Tests with wetting–drying cycles were carried out. Experimental data indicates that the wetting–drying cycles may induce an increment of axial strain, Δe, and a decrement of deviator stress, Δ(σ1 − σ3). With increment of the number of cycles, N, the values of Δe and Δ(σ1 − σ3) are increasing along logarithmic curves. Both change rates of Δe and Δ(σ1 − σ3) are sharply dropping with increment of N value. Thus, the effects of wetting–drying cycles on the strain–stress relationship of Test material are mainly concentrated on the period of first several cycles. Based on experimental data, several fitting equations, which may estimate the values of Δe, Δ(σ1 − σ3), change rates of Δe and Δ(σ1 − σ3), with increment of N value, were suggested.
Zhenfeng Qiu - One of the best experts on this subject based on the ideXlab platform.
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effects of wetting drying cycles on strain stress relationship from Triaxial Test of a mudstone mixture
Geotechnical and Geological Engineering, 2019Co-Authors: Junjie Wang, Minnan Liu, Zhenfeng Qiu, Huiping Zhang, J BaiAbstract:Soils filled in or along bank of a large reservoir may be subjected to wetting–drying cycles induced by cyclic lowering and rising of reservoir water level. The wetting–drying cycles may affect the mechanical behaviors of the soils. This study focused on the effects of wetting–drying cycles on the strain–stress relationship from Triaxial Test of a mudstone mixture. Several consolidated drained Triaxial Tests with wetting–drying cycles were carried out. Experimental data indicates that the wetting–drying cycles may induce an increment of axial strain, Δe, and a decrement of deviator stress, Δ(σ1 − σ3). With increment of the number of cycles, N, the values of Δe and Δ(σ1 − σ3) are increasing along logarithmic curves. Both change rates of Δe and Δ(σ1 − σ3) are sharply dropping with increment of N value. Thus, the effects of wetting–drying cycles on the strain–stress relationship of Test material are mainly concentrated on the period of first several cycles. Based on experimental data, several fitting equations, which may estimate the values of Δe, Δ(σ1 − σ3), change rates of Δe and Δ(σ1 − σ3), with increment of N value, were suggested.
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Effects of Wetting–Drying Cycles on Strain–Stress Relationship from Triaxial Test of a Mudstone Mixture
Geotechnical and Geological Engineering, 2018Co-Authors: Junjie Wang, Zhenfeng Qiu, Huiping Zhang, Liu Minnan, J BaiAbstract:Soils filled in or along bank of a large reservoir may be subjected to wetting–drying cycles induced by cyclic lowering and rising of reservoir water level. The wetting–drying cycles may affect the mechanical behaviors of the soils. This study focused on the effects of wetting–drying cycles on the strain–stress relationship from Triaxial Test of a mudstone mixture. Several consolidated drained Triaxial Tests with wetting–drying cycles were carried out. Experimental data indicates that the wetting–drying cycles may induce an increment of axial strain, Δe, and a decrement of deviator stress, Δ(σ1 − σ3). With increment of the number of cycles, N, the values of Δe and Δ(σ1 − σ3) are increasing along logarithmic curves. Both change rates of Δe and Δ(σ1 − σ3) are sharply dropping with increment of N value. Thus, the effects of wetting–drying cycles on the strain–stress relationship of Test material are mainly concentrated on the period of first several cycles. Based on experimental data, several fitting equations, which may estimate the values of Δe, Δ(σ1 − σ3), change rates of Δe and Δ(σ1 − σ3), with increment of N value, were suggested.
Huiping Zhang - One of the best experts on this subject based on the ideXlab platform.
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effects of wetting drying cycles on strain stress relationship from Triaxial Test of a mudstone mixture
Geotechnical and Geological Engineering, 2019Co-Authors: Junjie Wang, Minnan Liu, Zhenfeng Qiu, Huiping Zhang, J BaiAbstract:Soils filled in or along bank of a large reservoir may be subjected to wetting–drying cycles induced by cyclic lowering and rising of reservoir water level. The wetting–drying cycles may affect the mechanical behaviors of the soils. This study focused on the effects of wetting–drying cycles on the strain–stress relationship from Triaxial Test of a mudstone mixture. Several consolidated drained Triaxial Tests with wetting–drying cycles were carried out. Experimental data indicates that the wetting–drying cycles may induce an increment of axial strain, Δe, and a decrement of deviator stress, Δ(σ1 − σ3). With increment of the number of cycles, N, the values of Δe and Δ(σ1 − σ3) are increasing along logarithmic curves. Both change rates of Δe and Δ(σ1 − σ3) are sharply dropping with increment of N value. Thus, the effects of wetting–drying cycles on the strain–stress relationship of Test material are mainly concentrated on the period of first several cycles. Based on experimental data, several fitting equations, which may estimate the values of Δe, Δ(σ1 − σ3), change rates of Δe and Δ(σ1 − σ3), with increment of N value, were suggested.
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Effects of Wetting–Drying Cycles on Strain–Stress Relationship from Triaxial Test of a Mudstone Mixture
Geotechnical and Geological Engineering, 2018Co-Authors: Junjie Wang, Zhenfeng Qiu, Huiping Zhang, Liu Minnan, J BaiAbstract:Soils filled in or along bank of a large reservoir may be subjected to wetting–drying cycles induced by cyclic lowering and rising of reservoir water level. The wetting–drying cycles may affect the mechanical behaviors of the soils. This study focused on the effects of wetting–drying cycles on the strain–stress relationship from Triaxial Test of a mudstone mixture. Several consolidated drained Triaxial Tests with wetting–drying cycles were carried out. Experimental data indicates that the wetting–drying cycles may induce an increment of axial strain, Δe, and a decrement of deviator stress, Δ(σ1 − σ3). With increment of the number of cycles, N, the values of Δe and Δ(σ1 − σ3) are increasing along logarithmic curves. Both change rates of Δe and Δ(σ1 − σ3) are sharply dropping with increment of N value. Thus, the effects of wetting–drying cycles on the strain–stress relationship of Test material are mainly concentrated on the period of first several cycles. Based on experimental data, several fitting equations, which may estimate the values of Δe, Δ(σ1 − σ3), change rates of Δe and Δ(σ1 − σ3), with increment of N value, were suggested.
Xiong Zhang - One of the best experts on this subject based on the ideXlab platform.
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Photogrammetry-Based Method to Determine the Absolute Volume of Soil Specimen during Triaxial Testing:
Transportation Research Record, 2020Co-Authors: Sara Fayek, Xiaolong Xia, Xiong ZhangAbstract:Triaxial Tests are used extensively to evaluate stress-strain behavior for both saturated and unsaturated soils. A literature review indicates that all conventional Triaxial Test methods measure th...
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Factors influencing the accuracy of the photogrammetry-based deformation measurement method
Acta Geotechnica, 2019Co-Authors: Lin Li, Xiong ZhangAbstract:Triaxial Test has been widely used to investigate the stress–strain relationship of unsaturated soils. During Triaxial Testing, soil volume is an essential parameter to be measured. For an unsaturated soil, due to the presence of air phase, accurate volume/deformation measurement during Triaxial Testing was a great challenge for researchers. Recently, a photogrammetry-based method has been developed to measure the soil volume/deformation during Triaxial Testing. Preliminary Triaxial Test results indicate the new method is simple, accurate, and cost- and time-effective. However, some concerns regarding its measurement accuracy and applicability, which are critical for the dissemination of the photogrammetry-based method, have been raised by other researchers. These concerns were addressed in details in this study. The factors concerning the deformation measurement accuracy were systematically evaluated through a series of Triaxial Tests on an aluminum cylinder with different confining media and chamber pressures. A sensitivity analysis was carried out to investigate the impact of the system parameters on the volume measurement accuracy of the photogrammetry-based method. In addition, a Triaxial Test on a saturated sand specimen was conducted to evaluate the influences of mesh density, mesh pattern, and interpolation technique on the volume change measurement accuracy. Finally, some suggestions were provided to improve the accuracy of the photogrammetry-based measurement method.
