unsat13 - Volume Change Testing Volume Change Coefficients...

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Volume Change Testing Volume Change Coefficients or Indices The parameters required for constitutive equations relating deformation state variables and stress state variables. Table 1 - Volume Change Coefficients or Indices Deformation Coefficient Stress State or State Variable Index Variable d ε v 3(1-2 µ )/E d( σ mean -u a ) 3/H d(u a - u w ) dV w /V o 3/E w d( σ mean -u a ) 1/H w d(u a - u w ) d ε v d( σ mean -u a ) 1 s m 2 s m d(u a - u w ) dV w /V o d( σ mean -u a ) 1 w m d(u a - u w ) 2 w m de a t d( σ mean -u a ) a m d(u a - u w ) dw b t d( σ mean -u a ) b m d(u a - u w ) de C t d log( σ - u a ) C m d log(u a - u w ) dw D t d log( σ - u a ) D m d log(u a - u w ) de C' t d log( σ - u a ) C' m d log(u a - u w ) Plane I and III Plane II Volume-mass Form Compressiblity Form Elasticity Form UNSAT13 - 1
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Constitutive Surface on Log Scale C t or D t C m or D m III II I log (u a – u w ) e or w log ( σ – u a ) UNSAT13 - 2
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Volume Change Tests 1) Free-swell oedometer test Procedure
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unsat13 - Volume Change Testing Volume Change Coefficients...

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