Can Optistruct define a part to be rigid?

Hi

did you use RBODY keyword?

why did you have to change solver type to MUMPS?

-maxlen is to limit memory for solver usage, it cannot increase your ram to 64G

@tinh Thanks to your apply.

I have tried RBODY, my process is set>set element, Creat>rigid body>Elements set. It will error and I didn't set any property and material of my part.

At the second problem of the MUMPS because at this time my solution method is Non-linear quasi-static

and I have also tried maxlen and I also set the PARAM>HASHASSM>yes, but it still error.

You have to assign property and material for those elements

@tinh Thanks to your apply 

But I assign them prperty and material it still error

what is the error?

@tinh I finally 

constrained hole in RBE2

So why don't you let it deformable and constraint all its nodes by RBE2?

@tinh 

Because I want it to be rigid body 

So I just constraint it's bolt hole for RBE2.

please constraint all its nodes by rbe2 and rerun

Because I want it to be rigid body 

 

So I just constraint it's bolt hole for RBE2.

But what is the use-case?

This may not give proper results. 

@tinh Thanks for your reply. I will try it.

@Prakash Pagadala I use the part to contact with other part.

And one part is the rigid other is elastic material.

And the rigid part have the 4 bolt hole, I just give the 4 bolt RBE2.

My analysis at run it doen't have error, but it doesn't run finish. 

So I need to use the @tinh method to constrain all nodes to be RBE2 to rerun?

If I choose 3 parts it will show the error and just only a part will have 128937 nodes.

Here I have  a model and how should I constrain this 2 part to be rigid.

After that, can I use the high young's modulus to define the rigid body in non-linear quasi-static analysis?

If my material original young's modulus is 210 GPa, I modify to 210 E^15 Pa.

Really thanks.

Unable to find an attachment - read this blog