Problem in "Edit Calculix keywords"

General Questions
1

Hi,
I’m trying to enter an orthotropic material (wood) in an example using the “Edit Calculix keywords”.
I first declare an elastic material in Prepomax. The materials section automatically generated by PrePoMax in the Calculix input file is like this:

*Material, Name=Material-1
*Elastic 22000000000, 0.35
*Density 800

In order to declare the orthotropic material I have to enter something like this:

*ELASTIC, TYPE=ENGINEERING CONSTANTS
22000000000., 370000000., 370000000., 0.35, 0.02, 0.02, 1400000000., 1400000000., 1400000000.

If I declare a new material with another name, of course it is not recognizable back in Prepomax, so I cannnot assign it to the elements of my structure.

I can’t modify the line *Elastic generated by PrePoMax, so I decided to add a new *Elastic below the existing one, hoping the new declaration could overwrite the previous one. Now the materials section looks like this:

*Material, Name=Material-1
*Elastic 22000000000, 0.35
*ELASTIC, TYPE=ENGINEERING CONSTANTS 22000000000., 370000000., 370000000., 0.35, 0.02, 0.02, 1400000000., 1400000000., 1400000000.
*Density 800

But without sucess. The Analysis is crushing.
Is there some other way to declare the orthotropic material?

Thanks in advance,
George Nikolaidis

2

You can create a material with no properties and then add *ELASTIC under it in the Keyword Editor.

1 Like
3

Works perfect! Thank you!