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- W4366550089 abstract "CU test and CD test were performed to capture the stress-strain characteristics of the clay in Dongting Lake area, China. Since the classical constitutive model cannot ideally describe the strain hardening behavior of the clay, an improved constitutive model that involved three damage factors was proposed. The damage first factor <math xmlns=http://www.w3.org/1998/Math/MathML id=M1> <msub> <mrow> <mi>D</mi> </mrow> <mrow> <mn>1</mn> </mrow> </msub> </math> , which represents elemental volume strength <math xmlns=http://www.w3.org/1998/Math/MathML id=M2> <mi>F</mi> </math> , was fitted by the Weibull function. The second and third damage factors <math xmlns=http://www.w3.org/1998/Math/MathML id=M3> <msub> <mrow> <mi>D</mi> </mrow> <mrow> <mn>2</mn> </mrow> </msub> </math> and <math xmlns=http://www.w3.org/1998/Math/MathML id=M4> <msub> <mrow> <mi>D</mi> </mrow> <mrow> <mn>3</mn> </mrow> </msub> </math> , which represent the porosity ratio <math xmlns=http://www.w3.org/1998/Math/MathML id=M5> <mi>e</mi> </math> and the drainage rate <math xmlns=http://www.w3.org/1998/Math/MathML id=M6> <msub> <mrow> <mi>P</mi> </mrow> <mrow> <mi>ε</mi> </mrow> </msub> </math> respectively, were fitted by Harris function. The CD test damage model is constructed by <math xmlns=http://www.w3.org/1998/Math/MathML id=M7> <msub> <mrow> <mi>D</mi> </mrow> <mrow> <mn>1</mn> </mrow> </msub> </math> , <math xmlns=http://www.w3.org/1998/Math/MathML id=M8> <msub> <mrow> <mi>D</mi> </mrow> <mrow> <mn>2</mn> </mrow> </msub> </math> , and <math xmlns=http://www.w3.org/1998/Math/MathML id=M9> <msub> <mrow> <mi>D</mi> </mrow> <mrow> <mn>3</mn> </mrow> </msub> </math> . In the CU test, the porosity ratio <math xmlns=http://www.w3.org/1998/Math/MathML id=M10> <mi>e</mi> </math> is a constant value, and the drainage volume is 0, so that <math xmlns=http://www.w3.org/1998/Math/MathML id=M11> <msub> <mrow> <mi>D</mi> </mrow> <mrow> <mn>2</mn> </mrow> </msub> </math> is constant value and <math xmlns=http://www.w3.org/1998/Math/MathML id=M12> <msub> <mrow> <mi>D</mi> </mrow> <mrow> <mn>3</mn> </mrow> </msub> </math> is 0. Therefore, the CU test damage model of the clay was constructed using the damage first factor <math xmlns=http://www.w3.org/1998/Math/MathML id=M13> <msub> <mrow> <mi>D</mi> </mrow> <mrow> <mn>1</mn> </mrow> </msub> </math> . In the end, the accuracy of the proposed CU/CD damage constitutive models of the clay was validated with the experimental results. It is found that the results fitted by the proposed methodology are in good agreement with the experimental results." @default.
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- W4366550089 date "2023-04-20" @default.
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- W4366550089 title "Stress-Strain Relationship of Clay in Dongting Lake Area Based on Three Damage Factors" @default.
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