How does thermal expansion effect the diameter of a hole?

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SUMMARY

This discussion focuses on the effects of thermal expansion on the diameter of a hole in sheet metal, specifically steel. The linear expansivity principle is applied, indicating that the diameter of the hole will increase as the temperature rises, similar to how a circle drawn on the metal expands. Participants emphasize using the initial diameter as a reference point for calculations. The conversation highlights the straightforward nature of applying thermal expansion concepts to circular geometries.

PREREQUISITES
  • Understanding of linear thermal expansion principles
  • Familiarity with basic geometry and circular shapes
  • Knowledge of materials science, particularly properties of steel
  • Ability to apply mathematical formulas related to thermal expansion
NEXT STEPS
  • Research the formula for linear thermal expansion in materials
  • Explore the effects of temperature changes on different materials, focusing on metals
  • Learn about practical applications of thermal expansion in engineering design
  • Investigate the relationship between thermal expansion and structural integrity in metal components
USEFUL FOR

Engineers, materials scientists, and anyone involved in manufacturing or design processes that require an understanding of thermal expansion effects on materials.

TheNaturalStep
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How does thermal expansion effect the diameter of a hole in a sheet metall,

When we r dealing with length it is quite easy since then it is only the propotion of change in lengt, and there r standard formulas for this ...

But how do you do for a hole in a sheet metal who are free to expand, let's say steel and the hole r 4 mm ...

Anyway you comments are dearly appriciated!
 
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TheNaturalStep said:
How does thermal expansion effect the diameter of a hole in a sheet metall,

When we r dealing with length it is quite easy since then it is only the propotion of change in lengt, and there r standard formulas for this ...

But how do you do for a hole in a sheet metal who are free to expand, let's say steel and the hole r 4 mm ...

Anyway you comments are dearly appriciated!
The linear expansivity relates the change in distance between two points to the change in temperature. Now, suppose you chose those two points such that the line joining them is the diameter of the hole. Can you now answer the question yourself.

P.S. Is this homework?
 
Draw a circle on the iron with a pencil.
What happens to the circle?
 
Thanks for your replies
no it isn't a homework

pam said:
Draw a circle on the iron with a pencil.
What happens to the circle?

it expands :), so what i do is to use the diameter as L cero.

Thank you :)
 

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