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stress analysis

Hi,

i have two questions/problems for now

1) Is there a way to perform Stress Analysis without using a flexbody?

2) when i create a flexbody and define a contact at the Body, an error was shown when i tried to run the model. (Entity Model-PartBody.2 is turned off but is referenced by Model-Contact 3-jg_1. [General])

thanks in advance.

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asajd_20372

If you build your model with Inspire Motion you can perform structural (FEA) analysis of the rigid body mechanism.

You can get stress results like shown in attached video.

Unable to find an attachment - read this blog

yehoo

sadly i don't have inspire on my workstation

yehoo

i'm trying to Analyse the stress and behaviour of the 2 components in the picture. the green part is a Flexbody. i have defined a contact between the lobe(Grey) and cylinder(red).

From what i know, Stress Analysis can only be performed on a flexbody(correct me if im wrong). if i define the lobe as a flexbody, then the contact error Pop up when i run the model.

i think if i add an advanced Joint, it could solve the Problem. But i'm not sure how i can create a curve on the lobe surface.

<?xml version="1.0" encoding="UTF-8"?>

Chris Coker_21312

Direct 3d contact onto flexbodies like you are attempting is currently not supported.

There is a complicated workaround for this, but in general this is not recommended. Essentially, you create many interface nodes over the surface of the flex body. Then create tiny rigid bodies at each one of these location, at attach them with fixed joints. Then, you would define contact for each one of the small rigid bodes that were created.

yehoo

if i did an advance Joints, can i know the stress? or is it only possible to know the stress through flexbody?

Chris Coker_21312

An advanced joint should work to define the mechanism, but I don't think you will get the correct stress (on the surface of the cam contact)