Heat Effects on an Aluminum Annular Ring

In summary, when an annular ring of aluminum is cut from an aluminum like attached and heated, the hole decreases in diameter and expands in area at the same percentage as any other area of the aluminum. This is because of linear expansion forces that cause the shape of the hole to become slightly elliptical, while the aluminum expands outward. This effect can be visualized by considering the tiny radial rectangles that make up the annulus and their impact on the circumference, diameter, and area of the hole.
  • #1
Xamfy19
60
0
An annular ring of aluminum is cut from an aluminum like attached.

When the ring is heated,

1)the hole decreases in diameter
2)the area of the hole expands the same percent as any area of the aluminum
3)the area of the hole expands a greater percent than any area of the aluminum
4)linear expansion forces the shape of the hole to be slightly ellipitcal
5)the aluminum expands outward and the hole remains the same in size

I know the answer isn't 3), but I didn't get the answer. Thanks.
 

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  • #2
It's #2; the hole expands same amount as the rest.
 
  • #3
Imagine the annulus as composes of many tiny radial rectangles. Consider what happens to all four edges of the rectangles. Consider what that means for the circumference of the hole. Translate that into an effect on the diameter and area of the hole.
 
  • #4
Thanks alot

Thanks for all of you posted the reply.
 

1. What is an annular ring made of?

An annular ring is typically made of aluminum, but it can also be made of other materials such as copper, brass, or stainless steel.

2. How does heat affect an aluminum annular ring?

Heat can cause an aluminum annular ring to expand, which can lead to changes in its shape and dimensions. It can also affect its electrical conductivity and strength.

3. What is the maximum temperature an aluminum annular ring can withstand?

The maximum temperature an aluminum annular ring can withstand depends on its specific grade and alloy. Generally, aluminum can withstand temperatures up to 300-400 degrees Fahrenheit before it starts to soften and lose its strength.

4. Can heat cause an aluminum annular ring to fail?

Yes, excessive heat can cause an aluminum annular ring to fail. If the temperature exceeds the material's maximum limit, it can lead to deformation, cracking, or even melting of the annular ring.

5. How can heat effects on an aluminum annular ring be minimized?

To minimize the effects of heat on an aluminum annular ring, it is essential to choose the right grade and alloy for the specific application. Additionally, using proper insulation and cooling techniques can help prevent excessive heat from reaching the annular ring.

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