Can anyone guide me to the proper formula/methodology to evaluate the diameter increase of say a liner or cylinder under elevated temperature? I first assumed I could just multiply any dimension such as the bore or OD by the thermal coefficient to get the new dimension at new temperature. Now I'm not so sure. Maybe I should be multiplying the coefficient by the largest dimension (the OD) and scaling the original ID proportionately?
I'm trying to get a feel for 2 modes:
 heating the aluminum cylinder only & dropping in the CI liner at ambient & which is a slight interference fit to the cylinder at ambient.
 more importantly come removal time, heating the cylinder+liner combination to some temperature so the two parts can be removed. Here I can no longer apply different temperature, both parts will rise together.
Here is how my spreadsheet is evolving, but I'm lacking the proper underlying formula.
I'm trying to get a feel for 2 modes:
 heating the aluminum cylinder only & dropping in the CI liner at ambient & which is a slight interference fit to the cylinder at ambient.
 more importantly come removal time, heating the cylinder+liner combination to some temperature so the two parts can be removed. Here I can no longer apply different temperature, both parts will rise together.
Here is how my spreadsheet is evolving, but I'm lacking the proper underlying formula.
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