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[jump]

HELLO ALL DESIGNER

im undergraduate student from Malaysia...


we have to design car jack for our project..
so we decide to design exhaust car jack..

http://cache.gawkera...exhaustjack.jpg

we are facing problem on the calculation of pressure on the jack

which formula/ laws need to use...

anyone can help?





Sry for my bad English

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[PegoAC]

Hello - the balloon is a pressure vessel
the force of the car must be equaled by the force in the balloon pushing up.
Pressure equals force/area.
find the cross sectional area of the balloon (pi x radius x radius) - the max radius parallel to the ground.
Lifting half the car from the side use half it's mass x gravity to give the force.
This allows the pressure to be calculated
use pressure vesel calculations to find the stress produced in the material.

AC