- #1

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can anyone help me here? suppose there are well known formulas for this.

That is, contact area of a known size cylinder lying inside a larger know size cylinder....

hope problem is clear

thank you

best regards

martin

- Thread starter mhl
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- #1

- 6

- 0

can anyone help me here? suppose there are well known formulas for this.

That is, contact area of a known size cylinder lying inside a larger know size cylinder....

hope problem is clear

thank you

best regards

martin

- #2

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my guess is that, let CyLarge and CySmall,

so if u re finding volume, calculate the CyLarge volume subtract CySmall volume.

if it's area, CyLarge Area - CySmall Area.

sorry if i misreading ur question. =)

- #3

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I am tryoing to find the contact area of a given cylinder that is lying inside another cylinder. That mean the outside area of the smallest cylinder touching the inner wall of a known larger cylinder.

Ex: a 1 meter long cylinder with 5" diameter lyes inside a 1 meter long cylinder with 7" diameter. What is the contact area between the two cylinders....?

hope this was better.

- #4

HallsofIvy

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- #5

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Still, does that mean that a given cylinder, for example OD of 1m, lying on a straight plane has the same contact area to it's underlayer (tha plane) as the same cylinder lying inside a cylinder with ID of 1.001m??? (all things ideally and so on and so fourth)....

thoughs...?

- #6

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Would it be a limit? like lim as deltaX approaches 0 of (Xo * Height)?

(please excuse notation)

(please excuse notation)

- #7

AlephZero

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Yes, if you assume both cylinders are perfectly rigid.Still, does that mean that a given cylinder, for example OD of 1m, lying on a straight plane has the same contact area to it's underlayer (tha plane) as the same cylinder lying inside a cylinder with ID of 1.001m???

For real cylinders the answer is no, because they are flexible. Google for "Hertz contact" for more about that.

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