Orthotropic Material Definition

General Questions
1

I’m trying to define the orthotropic material property for both shell element and solid element.
The syntax followed is
*MATERIAL, NAME=ORTHO
*Density
1.6E-09
*ELASTIC, TYPE=ORTHO
59132.53, 59132.53, 10000, 0.004, 0.2, 0.2, 3757.7, 2500, 2500

i also tried
*Material, Name=ORTHO
*Density
1.6E-09
*ELASTIC, TYPE=ENGINEERING CONSTANTS
59132.53, 59132.53, 10000, 0.004, 0.2, 0.2, 3757.7, 2500, 2500

Also i tried adding the temperature at which the properties are defined
*ELASTIC, TYPE=ENGINEERING CONSTANTS
59132.53, 59132.53, 10000, 0.004, 0.2, 0.2, 3757.7, 2500, 2500, 294

But without success. The simulation is crushing all the time.
Is there some other way to declare the orthotropic material?

Thanks in advance,
Naveen R G

2

Are there any error messages ? For orthotropic materials, you should define *ORIENTATION.

*ELASTIC, TYPE=ORTHO and *ELASTIC, TYPE=ENGINEERING CONSTANTS differ significantly - in the case of the former you specify stiffness matrix terms directly while in the case of the latter you just define the elastic moduli in each direction.

4

I tried *ELASTIC, TYPE=ENGINEERING CONSTANTS and defined the elastic moduli in each direction but still its unable to solve .

Image
Image764×699 11.7 KB

Orthotropic_Quary.pmx (1.5 MB)

Is there anything I’m missing in material definition. Kindly check the attachment for the modal analysis for the beam.

5

The syntax for TYPE=ENGINEERING CONSTANTS is:

image
image831×530 24.1 KB

So you are missing the second line - you should move the last G there.

1 Like
6

At the end of the corresponding section in the manual there is a reference to example files.
7.46 *ELASTIC.

imagen
imagen1035×257 43.8 KB

beampo1 is the ortho material example

Also:

1 Like
7

I really appreciate your immediate response and the help you provided in clearing up my confusion. Thanks again for taking the time to assist me.