How does thermal expansion effect the diameter of a hole?

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Discussion Overview

The discussion centers on the effects of thermal expansion on the diameter of a hole in a sheet metal, specifically steel. Participants explore the relationship between temperature changes and the expansion of materials, considering both theoretical and practical implications.

Discussion Character

  • Exploratory, Technical explanation, Conceptual clarification

Main Points Raised

  • One participant questions how thermal expansion affects the diameter of a hole, noting that while linear expansion is straightforward for lengths, the situation is less clear for holes in sheet metal.
  • Another participant suggests that by considering the diameter of the hole as a line segment subject to thermal expansion, one might derive an answer to the original question.
  • A third participant proposes a practical approach by drawing a circle on the metal and observing that it expands, indicating that the diameter can be treated as an initial length for calculations.

Areas of Agreement / Disagreement

Participants express different perspectives on how to conceptualize and calculate the effects of thermal expansion on the diameter of a hole, indicating that the discussion remains unresolved with multiple viewpoints presented.

Contextual Notes

Some assumptions about the behavior of materials under thermal expansion and the specific conditions of the experiment are not fully articulated, leaving room for further exploration.

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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