topic Re: joint head Stress Analyse in Inventor Forum

joint head Stress Analyse

Anonymous — Thu, 11 Aug 2016 18:18:36 GMT

Hello everyone,

I would like simulate a joint head with a force 100N . but the result isn't realistic. because the joint head may not be stressed and under a force must not be deformed. what am I doing wrong?

u can see some pictures here.

best regards,

Sina

Re: joint head Stress Analyse

blair — Thu, 11 Aug 2016 18:23:57 GMT

What is your deformation? Everything will deflect. Inventor uses an auto-scale function to show the deflection if Deflected Model option is selected.

Re: joint head Stress Analyse

Binga — Thu, 11 Aug 2016 18:59:30 GMT

You can change the representation here:

Re: joint head Stress Analyse

JDMather — Thu, 11 Aug 2016 20:41:48 GMT

@Anonymous wrote:

....must not be deformed. what am I doing wrong?

Post image of your Displacement (not stress image).

Re: joint head Stress Analyse

Anonymous — Thu, 11 Aug 2016 21:29:15 GMT

hi,

the last images aren't correct but this one is alright. I think, I couldn't explain my problem.

here again:

from one side the piston rod is made fixed to a plate and from the other side to two joint head. and then I will apply a froce (100N) on the piston rod. In the reality it looks so:

but I will see the deformation in the simulation and so I can compare it with the reality construction.

but the simulation doesn't look realistic:

I mean the der

Re: joint head Stress Analyse

Anonymous — Thu, 11 Aug 2016 21:31:50 GMT

Re: joint head Stress Analyse

blair — Thu, 11 Aug 2016 21:39:40 GMT

You keep showing the Stress, what is the displacement. As posted, Inventor, by default will always produce a deflected model overlay. This overlay is not the actual amount but a highly over displaced view.

Set the View to Actual Displaced in the FEA display options.

Also look at the Displaced results in the browser.

Re: joint head Stress Analyse

Anonymous — Thu, 11 Aug 2016 21:39:57 GMT

Re: joint head Stress Analyse

Binga — Thu, 11 Aug 2016 21:41:40 GMT

Are you trying to reproduce the movement?

Re: joint head Stress Analyse

Anonymous — Thu, 11 Aug 2016 21:47:23 GMT

yes I'd like to see how the movement is, if I apply the force and also I'd like to see how are the stress and displacement

Re: joint head Stress Analyse

Anonymous — Thu, 11 Aug 2016 21:49:15 GMT

sorry but that has nothing to do with my problem

Re: joint head Stress Analyse

Binga — Thu, 11 Aug 2016 21:49:16 GMT

So, you need to check the contacts. I think they are set "Bonded".
Have you created the contacts automatically?

Re: joint head Stress Analyse

Anonymous — Thu, 11 Aug 2016 21:52:08 GMT

I created the contacs of the joint heads with '' Rotational''

Re: joint head Stress Analyse

JDMather — Thu, 11 Aug 2016 21:59:50 GMT

@Anonymous wrote:
sorry but that has nothing to do with my problem

@Anonymous wrote:
yes I'd like to see how the movement is, if I apply the force and also I'd like to see how are the stress and displacement

@Anonymous wrote:

....must not be deformed. what am I doing wrong?

You are contradicting yourself.

Attach your Inventor assembly here and end all doubt.

(I suspect what you really need to do is move over into the Dynamic Simulation Environment. But without the assembly....)

Re: joint head Stress Analyse

Binga — Thu, 11 Aug 2016 21:54:41 GMT

In the assembly enviroment or in the simulation enviroment?

Re: joint head Stress Analyse

Anonymous — Thu, 11 Aug 2016 21:58:41 GMT

in the assemply enviroment. I dident define the ontacts in simulation enviroment

Re: joint head Stress Analyse

Binga — Thu, 11 Aug 2016 22:06:13 GMT

You will need to set the contact behavior.

Your contact is supposed to be "BONDED" like this:

You will need to set some of them "Sliding / No Separation" (I guess):