Simple Mechanics problem - stepped shaft uniform load
Simple Mechanics problem - stepped shaft uniform load
(OP)

I need to know the general stress equation for a stepped shaft with a uniform load on section 2. The reactions R represent roller bearings, and are located at their centerlines. I don't know which equations from the charts to apply to each section. Thanks.





RE: Simple Mechanics problem - stepped shaft uniform load
section 2 is not very clearly shown ...
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RE: Simple Mechanics problem - stepped shaft uniform load
RE: Simple Mechanics problem - stepped shaft uniform load
btw, why in the FE forum ? checking a model result ?
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RE: Simple Mechanics problem - stepped shaft uniform load
As far as the forum, is there a better subforum for these questions? This is basically "homework help" but yes I am trying to validate a model.
I am trying to develop a standard 3D setup for briquetting rolls for FEA. The problem is I don't have access to 2D software (I have ProE mechanica basic), the engineer that usually does this analysis is located off site and uses 2D models, which I am essentially copying and trying to do by hand.
RE: Simple Mechanics problem - stepped shaft uniform load
please take your question to your TA or peer group.
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RE: Simple Mechanics problem - stepped shaft uniform load
RE: Simple Mechanics problem - stepped shaft uniform load
the moment in the beam is easy to calculate ...
assuming simply supported, length "L", then end reactions are (w*a)/2 ... where "a" = the length of the distributed load "w"
then define "b" = (L-a)/2 the unloaded length at each end of the load, yes?
then for x<b, M = Rx = (wa/2)*x
and for b<x<a/2, M = Rx-w(x-b)*(x-b)/2 ... Mmax(x=L/2) = RL/2-w(L/2-b)(L/2-b)/2 = waL/4-w*a/2*a/4
and the stress = My/I = M(d/2)/(pi*d^4/64) = 32M/(pi*d^3)
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RE: Simple Mechanics problem - stepped shaft uniform load
RE: Simple Mechanics problem - stepped shaft uniform load
the reaction is the same in both cases, no?
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RE: Simple Mechanics problem - stepped shaft uniform load
RE: Simple Mechanics problem - stepped shaft uniform load
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