A linear elastic model where the stress is directly proportional to strain. The proportionality constants are the Elasticity modulus ( ) and Poisson’s ratio ( ).

<Linear elastic-stress strain behavior>

Since the yield value is not defined, the calculated stress and strain of the linear elastic model can be highly unrealistic. Hence, it is recommended that the Mohr-Coulomb or other nonlinear material models be used for general analysis. However, this model is appropriate in modeling concrete or structural steel structures, which have a much higher strength than the ground.