Initial strain from moldflow (nastran output)

Altair Forum User

Hello.

 

I would like to run a linear static load in optistruct solver, by using strain output from Moldflow analysis.

Initial strain is available in following form (Nastran format);

 

'

$ OUTPUT PRODUCED BY MOLDFLOW PLASTICS INSIGHT
$
$-------2-------3-------4-------5-------6-------7-------8-------9-------0-------
STRAIN,1,1,2.931-3,1.352-2,0.000,0.000,0.000,0.000,+S1
+S1,0.000,0.000,2.931-3,1.352-2,0.000,0.000,0.000,0.000,+S2
+S2,0.000,0.000,2.931-3,1.352-2,0.000,0.000,0.000,0.000,+S3
+S3,0.000,0.000,2.931-3,1.352-2,0.000,0.000,0.000,0.000,+S4
+S4,0.000,0.000,2.931-3,1.352-2,0.000,0.000,0.000,0.000,+S5
+S5,0.000,0.000,2.931-3,1.352-2,0.000,0.000,0.000,0.000,+S6
+S6,0.000,0.000
STRAIN,1,2,1.060-2,5.582-3,4.536-3,0.000,0.000,0.000,+S1
+S1,0.000,0.000,1.060-2,5.582-3,4.536-3,0.000,0.000,0.000,+S2
+S2,0.000,0.000,1.060-2,5.582-3,4.536-3,0.000,0.000,0.000,+S3
+S3,0.000,0.000,1.060-2,5.582-3,4.536-3,0.000,0.000,0.000,+S4
+S4,0.000,0.000,1.060-2,5.582-3,4.536-3,0.000,0.000,0.000,+S5
+S5,0.000,0.000,1.060-2,5.582-3,4.536-3,0.000,0.000,0.000,+S6
+S6,0.000,0.000

'

 

Material tipe is MAT8.

I can't find a way to write initial strain or stress state to optistruct input.

 

Regards.

 

Altair Forum User

HI,

 

Initial Strain with OptiStruct is still under development. 

 

But, I think you can do that using RADIOSS using INI/SHELL/STRA_F or INI/BRICK/STRA_F.