*RVE_ANALYSIS_FEM (LS-DYNA version: R13, double precision, SMP/MPP)

  • RVE analysis using FEM


   Card 1

  • MESHFILE: name of an input file that contains the node and element information. Note that the file extension (e.g., .k) should be included.


   Card 2

  • INPT:   =0: RVE boundary conditions are defined automatically based on the parameter “BC”.

                    =1:​ RVE boundary conditions are defined manually by the user.

  • OUPT: =1: RVE homogenization results are output to a database file "rveout".

  • LCID:   ID of a loading curve specified by the keyword "*DEFINE_CURVE".

  • IDOF:  the dimension of the RVE problem (2 or 3).

  • BC:      type of the RVE boundary condition

               ​    =0: periodic displacement boundary condition (PDBC).

                   =1: linear displacement boundary condition (LDBC).

  • IMATCH:   Type of the RVE mesh for imposing PDBC

                   =0: the mesh is non-matching for PDBC​.

                   =1: the mesh is PDBC-matching.


   Card 3

  • Hij:    The ij-th component of the prescribed macroscopic displacement gradient.

  • If the entry for any component is left blank, a stress-free condition will be applied in that corresponding direction.

  • For 2D problems (IDOF=2), inputs for H33, H23, H13 are ignored.

*DATABASE_RVE (LS-DYNA version: R13, double precision, SMP/MPP)

  • Output of the RVE homogenization results to a ASCII database file named “rveout”.


   Card 1

  • DT:    time interval for the output of results to the rveout file.