1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Torque applied to cap on bottle, resulting force

  1. Nov 6, 2009 #1
    I have an interesting scenario. I'm trying to determine the amount of force that is applied to the underside of a bottle cap (the force from the bottle neck pushing upwards) as the cap is torqued onto the bottle (assume a 16 oz plastic bottle of Coke for example). After contact from the bottle on the underside of the closure the torque required to move the cap (to close it tighter) rises quickly. I want to know if I torque the cap on a given amount, say 20 torque in-lbs, what is the resulting force or pressure that is applied to the underside of the cap at that torque level. I assume the surface area of the bottle neck that contacts the cap would be important. Anything else? How do you factor in the effect of friction between the threads on the cap and those on the bottle in the torque load? Any help would be awesome, thanks.
  2. jcsd
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook

Can you offer guidance or do you also need help?
Draft saved Draft deleted