Help with Optistruct analysis

Altair Forum User

Hello,

I am doing a product simulation using Optistruct. My main aim is to find how the process results change according to the different material orientations, I am trying to simulate the additive manufacturing process. I have some problems now. I did the meshing using 3d tetra mesh, applied the boundary conditions, applied the loads, I get the analysis results for the respective loading cases. Now next I have apply the 3 material orientation directions (x,y,z) which will show the material deposition direction. I did that using the 2d>>composites>>material orientation, now my question is...is this the correct way, because I am getting the same results in analysis after doing this or am I doing something wrong. Does this have to do anything with the coordinate system, do I have to define a new coordinate system and then use the material orientation. I cannot share my model.

Thanks in advance,

Amey 

Altair Forum User

Hi Amey,

 

I understood that you have 3D elements in your model and you are trying to assign a system through 2D>> composites which is not valid.

 

Instead you can orient using Analysis>>System>>Material orientation>> Angle.

 

You can review material orientation using Orientation Review available in Aerospace profile.

Altair Forum User

Altair Forum User said:

Hi Amey,

 

I understood that you have 3D elements in your model and you are trying to assign a system through 2D>> composites which is not valid.

 

Instead you can orient using Analysis>>System>>Material orientation>> Angle.

 

You can review material orientation using Orientation Review available in Aerospace profile.

Hey Prakash,

Thanks a lot for the reply,

 

I did as you mentioned, but my next question is I have to compare the analysis results with different material orientations (which will show the material building direction for additive manufacturing) so how can I get those results using the Optistruct analysis. I tried the above method and then did the Optistruct analysis but I am getting the same displacement and element stress behaviour of the product for the x,y,z material orientation directions, am I making some mistake or this method wont work with Optistruct?

 

Thanks,

Amey Dholam

Altair Forum User

Hi @Ameydholam

 

Can you let me know what type of material are you using?

 

Meanwhile I will check with an orthotropic material and will update the results to you. 

Altair Forum User

Hello,

 

please help me how to apply spring pretension to CELAS elements to simulate vibration analysis of suspension seat.

 

regards

Allwin

 

 

 

Altair Forum User

Altair Forum User said:

Hi @Ameydholam

 

Can you let me know what type of material are you using?

 

Meanwhile I will check with an orthotropic material and will update the results to you. 

Hello,

 

I am using 316L (1.4404) Stainless Steel (MAT1)

Altair Forum User

Hi @Ameydholam

 

316L stainless steel is a isotropic material which posses same properties in all directions. right?

Altair Forum User

Hi @Prakash Pagadala

 

Yes, it is isotropic material, identical values of properties in all directions

Altair Forum User

Altair Forum User said:

Yes, it is isotropic material, identical values of properties in all directions

So the results will be same no matter what orientation you have. 

Altair Forum User

Altair Forum User said:

So the results will be same no matter what orientation you have. 

Okay, thanks a lot. I have another question, is it possible to simulate material building direction (Unlike in mold flow simulation, suppose from x-direction then again with y-direction and so on), I am trying to work on that in Hypermesh with my product. I want to do the analysis of the same product with different material building directions. 

 

Thanks and Regards,

Amey

Altair Forum User

Hi @Ameydholam

 

Not sure what you mean by material building direction, but if you are looking for how much material is required for a structure for a given loadcase, you can do a topology optimization. 

Altair Forum User

Altair Forum User said:

Hi @Ameydholam

 

Not sure what you mean by material building direction, but if you are looking for how much material is required for a structure for a given loadcase, you can do a topology optimization. 

By material building direction i mean, unlike in injection molding we can find how the plastic fills the mold. We provide a gate through which the plastic will start filling inside the mold and the product is manufactured, this complete process is simulated and analysed (I have a attached a sample about the same). I am trying to simulate and analyse the same thing here with steel, and this process is called additive manufacturing (3D Printing). I want to know whether it is possible in Hyperworks to do that.

 

Thanks and Regards
Amey

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