The Tresca soil model also assumes no plastic volumetric strains occur.
2.
It provides improved measurements of volumetric response-as during isotropic yielding, volumetric strain is distributed isotopically within the specimen.
3.
Further, an assumption commonly made to make the model mathematically tractable is that shear stress cannot cause volumetric strain nor volumetric stress cause shear strain.
4.
As an implication of undrained condition, no volumetric strains occur, and thus Poisson's ratio is assumed to remain 0.5 throughout shearing.
5.
During isotropic yielding volumetric strain is isotopically distributed within the specimen, this improves measurement of volumetric response during CD tests and pore water pressure during CU loading.
6.
The first term on the right is the constant tensor, also known as the "'volumetric strain tensor "', and the second term is the traceless symmetric tensor, also known as the "'deviatoric strain tensor "'or shear tensor.
7.
A similarity between the Moens-Kortweg equation and Newton's equation for the wave speed in a material is evident and both the Moens-Kortweg and Bramwell-Hill equations can be derived from Newton's equation for wave speed using the substitution of the equation of the bulk modulus in terms of volumetric strain.
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