User`s guide

33
Key Equations
The expression for internal pressure of a thin-wall vessel can be given by:



  
where E is Elastic Modulus of the material,  is the Poisson’s ratio of the material, t is the
wall thickness of the vessel, r is the radius of the vessel, 

is the strain in hoop
(circumferential) direction.
The stress in circumferential direction and axial direction is given by:










where P is internal pressure of the vessel, r is the radius, and t is the wall thickness.
Equipment List
 National Instruments USB-6229 DAQ
 Tacuna Systems Strain Gauge or Load Cell Amplifier/Conditioner Interface Manual
 Wheatstone Bridge Quarter Bridge Completion Circuit
 Vishay Strain Gage
 Shunt Resistors
 Three Cans of Soda of The Same Type