![](https://static.wixstatic.com/media/157719_8c0980cc0cd34f0ba9da68a5576a543e~mv2.jpg/v1/fill/w_288,h_193,al_c,q_80,usm_0.66_1.00_0.01,blur_2,enc_auto/157719_8c0980cc0cd34f0ba9da68a5576a543e~mv2.jpg)
*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.
![kwd_RVE_ANALYSIS_FEM_card1.png](https://static.wixstatic.com/media/7789a2_01e5d6bc3fd74f06927f39aa466fe5f6~mv2.png/v1/fill/w_624,h_68,al_c,q_85,usm_0.66_1.00_0.01,enc_auto/kwd_RVE_ANALYSIS_FEM_card1.png)
![kwd_RVE_ANALYSIS_FEM_card2.png](https://static.wixstatic.com/media/7789a2_fb221b52228b4aa0aadfc6a3ad06012e~mv2.png/v1/fill/w_624,h_66,al_c,q_85,usm_0.66_1.00_0.01,enc_auto/kwd_RVE_ANALYSIS_FEM_card2.png)
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.
![kwd_RVE_ANALYSIS_FEM_card3.png](https://static.wixstatic.com/media/7789a2_3020685e636044f19719f74c8916b2ad~mv2.png/v1/fill/w_62,h_7,al_c,q_85,usm_0.66_1.00_0.01,blur_2,enc_auto/kwd_RVE_ANALYSIS_FEM_card3.png)
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.
![kwd_Database_RVE_card1_v2.png](https://static.wixstatic.com/media/7789a2_f7995e34676c4c0cb0da90cdfb6befb1~mv2.png/v1/fill/w_62,h_7,al_c,q_85,usm_0.66_1.00_0.01,blur_2,enc_auto/kwd_Database_RVE_card1_v2.png)