abstract:The Arbitrary-Lagrangian-Eulerian General Research Applications (ALEGRA) code is a next-generation large-deformation shock physics code created by researchers at Sandia National Laboratory. This code uses an "Arbitrary Lagrangian-Eulerian" (ALE) formulation on an unstructured mesh, allowing one to designate whether material should flow through a stationary mesh (pure Eulerian), whether the mesh should move with the material (pure Lagrangian), or whether the mesh should be allowed to move independently of the material motion (arbitrary).