Relationship between diameter and strength of hollow tube

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SUMMARY

The relationship between the diameter size of a hollow tube and its flexural strength is non-linear, specifically dependent on the diameter raised to the power of three or four. This conclusion is drawn from principles in Strength of Materials and solid mechanics, rather than basic physics. To accurately measure flexural load across different diameters, experimentation or the use of analysis software is essential for normalization of data.

PREREQUISITES
  • Understanding of Strength of Materials principles
  • Familiarity with solid mechanics concepts
  • Knowledge of flexural load measurement techniques
  • Experience with data normalization methods
NEXT STEPS
  • Research the mathematical relationship between diameter and flexural strength in hollow tubes
  • Explore software tools for structural analysis, such as ANSYS or SolidWorks
  • Learn about experimental design for measuring flexural loads
  • Investigate normalization techniques for comparing data across different tube diameters
USEFUL FOR

Engineers, materials scientists, and researchers involved in structural analysis and design of hollow tubes, as well as anyone interested in understanding the mechanics of materials under flexural loads.

ashleytan
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Hi,

I was wondering what is the relationship between 'diameter size' and the strength to flex a hollow tube... is it linear or non-linear?

I'm measuring the flexural load of different hollow tubes (with different diameter size) and looking for a way to normalize the the flexural load data based on their diameters. Is that possible?

I should mention that my aim is to find out the force needed to flex the material in the tubes and my tubes come in different diameters.

Physics is not my forte and any help would be very much appreciated!
 
Last edited:
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ashleytan:
It's not physics which will guide you in setting up your experiment and analyzing the data obtained. Strength of Materials or solid mechanics are more pertinent disciplines.
 
I'm not sure and I don't feel like checking, but I believe it depends on diameter^3 or even diameter^4. So no, it's FAR from being linear.
 
Exactly, it cannot be linear. Even Hooke's law is valid only for very small deformations. Experimentation is the best way to check or any analysis software
 

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