tube fitted within tube w interference. Shrink i.d. of inner tube?
tube fitted within tube w interference. Shrink i.d. of inner tube?
(OP)
Seems like this should be a standard calculation, but I can't find it.
If I have a smaller tube 1 with inner and outer diameter ID1 and OD1
Fit into a larger tube with inner and outer diameter ID2 and OD2
Where an interference delta = OD1-ID2 > 0
Perhaps different E1 and E2 (but not essential).
Where can I find the formula for reduction in ID1?
If I have a smaller tube 1 with inner and outer diameter ID1 and OD1
Fit into a larger tube with inner and outer diameter ID2 and OD2
Where an interference delta = OD1-ID2 > 0
Perhaps different E1 and E2 (but not essential).
Where can I find the formula for reduction in ID1?
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RE: tube fitted within tube w interference. Shrink i.d. of inner tube?
Try this calculator:-
http://www.tribology-abc.com/sub23.htm
regards
desertfox
RE: tube fitted within tube w interference. Shrink i.d. of inner tube?
Here's another calculator:-
http://www
regards
desertfox
RE: tube fitted within tube w interference. Shrink i.d. of inner tube?
http://ww
RE: tube fitted within tube w interference. Shrink i.d. of inner tube?
The formula for inner radius change can be found from:
x = (p*Ra/E)* ((Rb^2 + Ra^2/Rb^2-Ra^2)+ v)
where Ra = inner radius
Rb = outer radius
V =poissons ratio
E = elasticity modulus
p=pressure
pressure in your case would be the pressure generated at the interface of the mating cylinders
regards
desertfox
RE: tube fitted within tube w interference. Shrink i.d. of inner tube?
RE: tube fitted within tube w interference. Shrink i.d. of inner tube?
=====================================
Eng-tips forums: The best place on the web for engineering discussions.
RE: tube fitted within tube w interference. Shrink i.d. of inner tube?
Strain compatability.
Timoshenko's Strength of materials (Part 2) covers this topic.
Using the same notation as Desertfox above, the radial displacement at the outer surface due to external pressure is:
x = -(p*Rb/E)* ((Rb^2 + Ra^2/Rb^2-Ra^2)- v)
(the minus sign indicates that the displacement is towards the axis of the cylinder).
I actually think this topic was covered in eng-tips previously somewhere.
RE: tube fitted within tube w interference. Shrink i.d. of inner tube?
40818 is spot on, but if you want a further explaination
see this site:-
http://
desertfox
RE: tube fitted within tube w interference. Shrink i.d. of inner tube?
One point to consider: If the local stresses at the faying surfaces do compute as exceeding the published proportional limit, after the joint is made, it is usually OK if ductile materials are used.