Assembly analysis 2

[smith4464]

Any advice/comments/suggestions/experience with how many parts is maximum or rather worth assembling for force/pressure in CosmosWorks?

Bascially if I'm assembly several components and applying various forces and pressures. When does CosmosWorks reach it's pratical limit?

Does putting components into sub-assemblies and assembling them help?

Thanks.

 

[salmon2]

I think it will be mainly up to your hardware, not software or solidworks. Contact between components slows everything down much more than number of elements. I usually just do FEA on single part or two parts assembly. The most one I did is probably just 4 or 5 components together. Nonlinear will further slow you down.

And the answer to your last question is no.

 

[KevinDeSmet]

There's an old rule called the slegdehammer approach to narrow down number of parts, basically it has to do with the stiffness of your parts and depending on the stiffness you may or may not be able to skip solving contact and just use a boundary condition.

There is some info about it here:

http://www.google.be/url?sa=t&source=web&cd=1&ved=0CCoQFjAA&url=http://

http://www.eng.uwo.ca/designcentre/...RxEj2OJNg&sig2=Ti4L74t095LLtO4cuw9UhQ&cad=rja

and here, specifically step 4:

https://forum.solidworks.com/commun...simulation/blog/2009/12/29/steps-for-analysis

Certified SolidWorks Professional

 

[kellnerp]

If your model behaves as a mechanism you might consider using Motion to obtain the dynmaic loads and then analyze individual components. Might be faster in the end.

Usually global models are for global loads and then you apply those loads to individual parts. If the model is not a mechanism and is linear you can use substructuring.

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CSWP, BSSE

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[smith4464]

It's a bolted and "wedged"/press fitted assembly. Seeking if clamps will hold and the stresses induced on components.
I posted a similar assembly and question before showing a similar assembly in both this forum and the regular SoludWorks forum. On IPhone at the moment or I would upload an edrawing now.

 

[kellnerp]

Use St. Venant's principle and just analyze particular press fit/wedge locations and not the whole assembly at once.

faq1183-1719



TOP
CSWP, BSSE

http://www.engtran.com

http://www.niswug.org

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[EngAddict]

remember statics classes? calculate your loads then apply them to your individual weldments. check your reactions as you go to make sure you have applied your loads correctly.

 

[smith4464]

Here is a partial assembly not showing the "form" that the clamping is holding...

 

[smith4464]

Here is the entire assembly showing the form/mold to which pressure is being applied ( from a liquid ) on the inside and being held so as not to deform too much by the clamping system.

My goal is to find stresses in clamps and bolts and deformation of the "form" by internal pressure with the clamps holding it in place.