View single post by Kitbash0n30
 Posted: Mon Jan 8th, 2018 08:10 am
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Joined: Mon Dec 10th, 2012
Location: Boonville, Missouri USA
Posts: 752
If you are in the mood for math,

"Solution to Problem 263 Thermal Stress Problem 263 Steel railroad reels 10 m long are laid with a clearance of 3 mm at a temperature of 15°C. At what temperature will the rails just touch? What stress would be induced in the rails at that temperature if there were no initial clearance? Assume α = 11.7 µm/(m·°C) and E = 200 GPa."

Or if not, and you just  want to buy something and be done with it,
March 2013
Rail News: MOW Railroad suppliers provide ways to prevent track from bending and twisting
Since the neutral temperature can't be set when rail is laid, "we must set the desired neutral temperature, which is determined by each railroad based on their criteria," says Zuspan, adding that the American Railway Engineering and Maintenance-of-Way Association (AREMA) provides a formula to compute a desired neutral temperature. For example, well-built and maintained ballasted track might not buckle until it registers an increase above the neutral temperature of 50 F to 70 F, and the same track might not pull apart until it experiences a decrease below neutral temperature of 105 F to 130 F, emphasizing the need to correctly set the desired neutral temperature, says Zuspan. De-stressing rail minimizes the risk of a buckle, he says. There are several ways to de-stress rail, including the use of a rail puller and special rail heaters, which direct a flame into the web of an unrestrained piece of rail to heat it and elongate it by a specific amount, depending on the current rail and neutral temperatures, he says.

Last edited on Mon Jan 8th, 2018 08:21 am by Kitbash0n30

See y'all later, Forrest.
Screw the rivets, I'm building for atmosphere
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