# 15.9. Linear Elastic

    BEGIN PARAMETERS FOR MODEL LINEAR_ELASTIC
      YOUNGS MODULUS = <real>
      POISSONS RATIO = <real>
      SHEAR MODULUS  = <real>
      BULK MODULUS   = <real>
      LAMBDA         = <real>
    END [PARAMETERS FOR MODEL LINEAR_ELASTIC]

The `LINEAR_ELASTIC` material is used for modeling infinitesimal strain elastic response. Generally this model is used for code verification work when comparing to infinitesimal strain solutions. This differs slightly from the standard `ELASTIC` model which is formulated for general finite strain.