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On Hyperelasticity for Clays

A. Niemunis
M. Cudny
Journal / Anthology

Computers and Geotechnics
Year: 1998
Volume: 23
Page range: 221-236

Under purely elastic conditions a constitutive model for clays should be conservative. This can be achieved by using a hyperelastic stress-strain relation derived from an elastic potential. To circumvent problems connected with formulation of a suitable potential a simple concept of back-stress elasticity is proposed. Several elastic models are critically reviewed, two of which had been originally incorrectly classified as hyperelastic. A novel elastic potential which cab be used to generate various hyperelastic models is proposed. Its salient feature is that the resulting stiffness is a homogeneous function of order 1 with respect to stress. An example of Mathematica calculation with tensorial differentiation is enclosed.

*Science > Geology and Geophysics