Hello,
How to I calculate the change in ID of a hard coat anodized aluminum tube with an increase in temperature of the tube?
I found this formula:
d' = d(1 + \alpha \delta T)
\alpha is linear expansion coefficient
Does this work for both the ID and OD of the tube?
Regards,
Paul
desertfox, GBor:
The tube should not be significantly in bending. We are using a steel tube right now with 1/8" wall thickness and there is no apparent bending.
We are moving towards using aluminum, and a smaller wall thickness, so I want to crunch the math to see if it makes sense...
Thanks khardy & GBor:
That's good to know! Especially that it matches the results from the equation electricpete provided.
Do you know if SolidWorks or Alibre has the same capability?
My mistake, the maximum stress is set to the yield tensile strength (or ultimate tensile strength) for the metal being used, which in this case is aluminum 6061-T6.
Using the following:
sigma = M * r / I
M = WL/4 (I'm not sure why this equation)
and solving for W
W = (4I*sigma) / (L * r)...
Ooops.. I treated ID and OD in the equation as diameters, but as electricpete says should be the inner and outer radius respectively.
Tube with Slot:
I=0.017975
Tube:
I=0.02031
My ultimate goal is to determine the weight at the yield point for the tube. Using the equation for the maximum...
Thanks everyone.
These are my dimensions:
Tube OD = 1"
Tube ID = 0.875"
Tube Length = 6"
Slot Width = 0.5"
Slot Length ~ 4"
electricpete:
The piston is normally fixed at either end of the slot, and travels between these locations. The piston is loaded when in a fixed position, and is not...
Hi,
I'm trying to determine the failure point for a tube with a slot. The tube has a piston sliding back and forth, and is loaded laterally by an external weight attached to the piston through the slot.
I can't seem to find an equation representing the moment of inertia for a tube with a...
Thanks for your responses.
rb1957, currently the tube is loaded at either of the ends, so perhaps WL/4 is an appropriate ball park figure. Does this includes a compensation for the slot, which as you indicate weakens the entire tube?
Are you indicating that a tight fitting cylinder, still...
I found the following analysis related to a beam analysis. Would the final formula be correct?
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The ultimate loading of these tubes is of interest in view of possible misfortunes, such as
unauthorized visitors climbing on the tubes or tree...
Hello,
I have a seating application that involves a metal cylindrical tube, steel or aluminum most likely, which includes a metal cylinder sliding back and forth. The tube has a slot on top through which a rod extends from the cylinder to support a seat.
I have a prototype working, which was...
