Cantilever Beam - which model best represents?

hgordon · May 4, 2018

Hi there,

I have a setup as shown in the following schematic:

https://files.engineering.com/getfi...67f1-4463-9254-229fe1be8284&file=Capture3.JPG

The 'cantilever beam' sits laterally onto another 'support beam' with two bolts holding it.
Originally I modelled it simply as the two bolts as pinned supports, but now I think the 'support beam' edge should be a third pinned support??
As this 'support beam' is also supporting downward force?
The model of two bolts is follows:

https://files.engineering.com/getfi...57c3-47bf-b48d-ab66c01351de&file=Capture1.JPG

The model of two bolts and 'support beam' is as follows:

https://files.engineering.com/getfi...c7e3-4198-93f3-578631e63ce3&file=Capture2.JPG

Thoughts?

Thanks,

TimSchrader2 · May 31, 2018

hello

The model with two reactions at each bolt is most accurate. Except the bolt further from the pivot will take the most load. In proportion to its distance from the pivot. As the stretching and tension in bolt will be more.

This assumes no bending of the beam to the right of the pivot, which is not fully true, but accurate enough.

There will always be a load at a pivot point or line

DaveAtkins · Jun 1, 2018

Neither model is correct. The edge of the support beam will be an upward reaction, and the bolt furthest from the edge of the support beam will be in tension.

DaveAtkins

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Cantilever Beam - which model best represents?

hgordon

Chemical

TimSchrader2

Mechanical

DaveAtkins

Structural

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