*RVE_ANALYSIS_FEM (LS-DYNA version: Beta, double precision, SMP/MPP)
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RVE analysis using FEM
Card 1
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MESHFILE: name of the user-defined mesh file including the node and element info. The boundary conditions are stored in a new file named "rve_MESHFILE".


Card 2
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INPT: =0: the program will analyze the RVE mesh and generate (or overwrite) the boundary condition file.
=1: the boundary condition file is provided by the user.
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OUPT: =1: RVE homogenization results will be output to a database file "rveout".
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LCID: loading curve id specified by the keyword "*DEFINE_CURVE".
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IDOF: the dimension of the RVE problem (2 or 3).
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BC: type of the boundary condition
=0: periodic boundary conditions.
=1: displacement boundary conditions.
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IUNI: algorithm id for applying periodic boundary conditions (BC = 0)
=1: for matching mesh (direct search & nearest neighbor).
=0: for non-matching mesh (less efficient).

Card 3
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E11: Green strain component in 11 direction.
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If the input for a strain component is empty, stress-free condition will be applied in that direction. For 2D problems (IDOF=2), inputs for E33, E23, E13 are ignored.
*DATABASE_RVE (LS-DYNA version: Beta, double precision, SMP/MPP)
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Output of the RVE homogenization results to a ASCII database file named “rveout”.

Card 1
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DT: time interval of database output