The linear model is the basic material model that assumes a linear relationship between the stress and strain given by the Hooke law. The following data are required:
unit weight of soil
modulus of elasticity
In a one dimensional problem the Hooke law describes the linear dependence of stress σ on strain ε via the Young modulus E (modulus of elasticity), see the Figure below. In this framework the linear model provides a linear variation of displacements as a function of applied loads.
Stress-strain relationship for LM