Find beam stress in a beam with varying cross section

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Discussion Overview

The discussion revolves around calculating stresses in a beam with a varying cross section. Participants explore methods for analyzing such beams, particularly in the context of a design problem without specific dimensions. The scope includes theoretical approaches and practical considerations for beam design.

Discussion Character

  • Homework-related
  • Technical explanation
  • Conceptual clarification

Main Points Raised

  • One participant expresses uncertainty about how to calculate maximum stress in a beam with a varying cross section and seeks guidance.
  • Another participant suggests that there are standard methods for dealing with variable section beams and inquires whether the original poster has consulted reference books or conducted online research.
  • A later reply reiterates the need for more details about the problem and emphasizes the importance of understanding the transition between different cross sections.
  • Participants suggest posting a 3D sketch of the assembly to provide better context for the forces acting on the beam.

Areas of Agreement / Disagreement

Participants generally agree that standard methods exist for analyzing variable section beams, but there is no consensus on specific approaches or solutions due to the lack of detailed information about the problem.

Contextual Notes

The discussion highlights limitations in the original poster's understanding of the problem and the need for specific dimensions and details about the beam's design. There are unresolved aspects regarding the application of standard methods to the unique situation presented.

Bohr1227
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Homework Statement


Hi, I'm trying to figure out how to calculate the stresses in my beam. The cross section varies (shown in the picture), and I don't know how I'm supposed to think to find the maximum stress. I appreciate tips or links to learn how to do it. Thanks. Sorry if the picture is bad, but I hope you understand what I mean.
odin.png


Homework Equations


I don't know what to do when my cross section varies.

The Attempt at a Solution


I don't know what to do when my cross section varies.
 
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There are standard methods for dealing with variable section beams . Have you done any research online or looked in any standard reference books such as Timoshenko or Megson ?

What are the full details of the actual problem that you are dealing with ?
 
Last edited:
Nidum said:
There are standard methods for dealing with variable section beams . Have you done any research online or looked in any standard reference books such as Timoshenko or Megson ?

What are the full details of the actual problem that you are dealing with ?
Hi, the problem is to design a beam by myself. I don't have any spesific dimensions. The problem is that I don't know how to deal with it when it goes from one cross section to another. I have tried to look it up on online, but didn't find anything. I just know that it should look something like that with a hole for a wheel to roll into.

Thanks! :)
 
Try posting a 3D sketch of the whole assembly of beam , wheels and any other related components .
 
Nidum said:
Try posting a 3D sketch of the whole assembly of beam , wheels and any other related components .
Something like this. The forces come from the wheel because they are supporting a weight.
phys.png
 

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