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Force to close a

Alexandrite

Force to close a

Goodmorning,

I have a following question: Is it possibile investigate with Creo Simulate the value of the force in order to "close"

the purple solid against the Yellow solid.I need a non-linear analisys, right?

Thank you for your help

 

 

20 REPLIES 20

Re: Force to close a

Yes you want non-linear.  Large Deformation and possibly Elasto-plastic material

Here is the difference in small displacement and Large displacement (small on left)

 

Bendy1.JPG

 

Here is how you do the 1.4mm deflection

Bency_enforced_displacement.JPG

 

Here is how you prevent infinite stress at the edge constraint... with a small region made rigid.

Bendy_rigid_region.JPG

 

 

Here is the measure used to obtain the force.

Bendy_reaction_Force.JPG

 

 

Here are the Analysis definitions.  If using elasto-plastic material then Plasticity will have a check mark.

Bendy_Analysis_Def1.JPG

Bendy_Analysis_Def2.JPG

 

 

Plotting the measure vs. time

 

Bendy_graph_Force.JPG

 

 

Final results.  If stress is above yield then you should use ELASTO-PLASTIC material.  Nonlinear material + non-linear geometry.  Otherwise force is generally predicted too high.  

 

Bendy_result.JPG

 

Confirmation?  Run this model with found force (48N in this case) in X direction as a load in place of the enforced displacement.  Confirm max displacement about 1.4mm in X direction.

 

 

BONUS - I used a Mapped Mesh (not totally necessary but results are so smooooth!)

Bendy_Bonus_Mapped_Mesh.JPGBendy_Bonus_Mapped_Mesh2.JPG

 

Re: Force to close a

Thank you for a good response

but I'm not able to open the file.....

 

 

Re: Force to close a

That is why I had all the details... because not everyone is using the same version.

Re: Force to close a

pressure_opt.jpg

Highlighted

Re: Force to close a

But for Use "ELASTOPLASTIC" material is correct this?

 

Re: Force to close a

Yes.

 

Use creo help to understand elastoplastic in Creo.

Link to help

Re: Force to close a

Simulate said me that costraint and rigid link on surface region to prevent infinity stress is incompatible...

 

Re: Force to close a

This is OK.  It is a warning, not an error.  Only use caution when this message appears because you may be asking the model to do two different things at same time.

Re: Force to close a

What You do in your model? You used the same way or an other?

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