Calculate deflection of rod/axlepipe due to distributed load

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Discussion Overview

The discussion revolves around calculating the deformation of a rod, axle, or pipe subjected to a distributed load. The inquiry includes specific dimensions, material properties, and the nature of the load, focusing on the theoretical aspects of deformation and bending in structural engineering.

Discussion Character

  • Homework-related, Technical explanation

Main Points Raised

  • One participant is attempting to calculate the deformation of a rod with specified dimensions and material properties under a distributed load of 491 N/mm, having calculated the second moment of inertia.
  • The participant expresses uncertainty about the applicability of a specific formula for rod deformation, suggesting that their results may be incorrect.
  • Another participant questions the source of the equation used and emphasizes the importance of the type of support in the analysis.
  • There is a clarification that the inquiry is related to a bachelor thesis, indicating an academic context for the question.

Areas of Agreement / Disagreement

Participants do not reach a consensus on the appropriate formula for calculating deformation, and there are multiple viewpoints regarding the relevance of the type of support and the source of the equation.

Contextual Notes

The discussion does not clarify the assumptions behind the chosen formula or the specific conditions of the support type, which may affect the calculations.

Krismein
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Summary:: Calculate the deformation on a rod/axle/pipe due to a distributed load.

I’m manually trying to calculate the deformation on a rod/axle/pipe due to a distributed load. The rod has an outer diameter of 62mm and an inner diameter of 50, is 170mm long, made from a material with an E-module=200GPa and Poisson's ratio = 0,3. The load is distributed along the whole length of the rod and is 491 N/mm. I have calculated the second moment of inertia I to be 418536mm^4, and I’m having no luck finding a formula for rod deformation/bending.

I have tried using this formula:
1649950710710.png

But i don't think it applies for rods, as my answer is low.
 
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Is this question for your work or is it a schoolwork question?
 
Where did you get that equation from?
The type of support is very important.
 
Lnewqban said:
Where did you get that equation from?
The type of support is very important.
From a Norwegian book for engineering. Posting a pic below.
 

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berkeman said:
Is this question for your work or is it a schoolwork question?
For my bachelor thesis😁
 
Nice. I'll move it to the schoolwork forums then. :smile:
 

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