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Linear Elastic
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.. code-block:: sierrainput

   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.