Interference fit analysis question.
Interference fit analysis question.
(OP)
I am looking for any online text concerning stress analysis for interference fit situations, i.e. thermal fit cylinders. As an aside; is anyone familiar with the "Engineering Solid Mechanics" book by Ragab and Bayoumi. It is littered with typos and errors and is frankly totally unsable, I am totally disappointed in it.





RE: Interference fit analysis question.
I don't know about online info on interference fit analysis but all good strength of materials books should have what you look for.
Try Strength of Materials by Egor Popov of UCLA - I think it is still in print. It is a very good text and also treats interference fit problems.
Regards
Andries
RE: Interference fit analysis question.
RE: Interference fit analysis question.
RE: Interference fit analysis question.
If one is very thick then assume that it does not stretch and that the thin walled tube takes all the stress. Caution is required if the outer is cast iron and thin. Theraduius ratio can be found by relating the circumferential stiffness. So, outer 2X so stiff strain is 1/2 of total.
RE: Interference fit analysis question.
Given the initial dimensions and material properties, you know the stiffness of the cylinders and the total displacement at the interface .... i.e. the sum of the contraction of inner cylinder plus expansion of outer cylinder. The distribution of displacement depends on the relative stiffness of each cylinder. The method contained in the reference above uses the displacement equations for a thick cylinder subject to internal/external pressure to find the pressure required to force the sum of the radial displacements at the interface to equal the interference. This requires some iteration that can be handled fairly easily by using the solver feature in MS Excel, or by using any one of a number of methods in Mathcad.
RE: Interference fit analysis question.
Machinery handbook has a good section on shrinkage fits but only deals with cast iron vs steel or steel vs steel with tables of factors to be used in the equation. the tables allow for solid or tubular shaft.
Jesus is the WAY
RE: Interference fit analysis question.
that was exactly the answer I was looking for. Thank you that was very helpful.
bobito
RE: Interference fit analysis question.
you're welcome