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I'm just looking for very basic mechanisms. Right now im interested in putting together an offset slider crank mechanism. 3D printing is obviously the way to go, that was a cool video! But sadly it is too cost prohibitive right now.

Has anyone found some good “toys” or other objects that mechanisms can be made out of to visualize forces and motion? Sometimes it’s better to physically manipulate something rather than seeing it on a computer and 3D printing is expensive

This is the question that is posed There’s clearly something a little different going on here than poissons*sigmax which can be identified by looking at the stress contours I posted

Thanks Thomas. My only challenge now is to decide how the hole effects this!

So it should be sigmay=Kt*v*sigmax if Kt=stress concentration, v=poissons ratio?

Thanks for your input ThomasH it is much appreciated. See below for the sigmaz and sigma x results. As you can see sigmaZ is fairly large actually

so technically there are constraints in the y and z direction. The face on the far left is fixed. FEA simulation is showing the following. I’m not sure how to explain why there are sigmay stresses, or show what they should be in hand calcs

Very well. This is more of a theoretical question.

Should this go in the mechanical engineering section?

Should there by sigma y and sigma z stresses in this plate due to poisons ratio effects? How would I go about finding exactly what they are?

I think my post may have been misunderstood. I am wondering about the value of rolling friction from rest, not how it is different from sliding friction. I think that the answer is that friction is infeticemal before rolling starts

Is the coefficient of rolling friction the same when the object to be pushed is as rest as it is when the object is already in motion. Intuition tells me the rolling resistance is higher at rest, but I cannot find a resource to prove this. Any help is appreciated...

We really want to stay inside of Autodesk. I did see that "moving" families can be made inside of inventor that can be set with certain parameters that control movement in the full model. Has anybody had any experience using that workflow? I assumed structural members would lose their...

Does anyone know of a good Autodesk workflow for designing a structure with moving elements, such as a drawbridge, or a dome with a retractable roof? Is there a way to use Revit as the base design program for all of the structure and still design all of the moving parts and simulate motion...

Is shear stress through a flat bar evenly distributed through the cross section,or maximum at center and less at the extreme fibers? If it is maximum at the center and decreasing outwards what causes this?

How do I apply loads to only one side of a pin hole? The surfaces that come in with my geometry when I import a step file don’t line up on either side of the hole, but rather top and bottom. The pin hole I am analyzing has a force pushing to the left, but I am not able to represent that with the...

Can chapter G of the AISCM be used for a built up beam subject to longitudinal shear, but obviously using the correct cross sectional dimensions? A=web length*web thickness