Stress and strain analysis on a thin-walled cylinder Investigation of axial and circumferential stress in a thin-walled cylinder under internal pressure Features - strain on a vessel under internal pressure - cylinder with strain gauge application as vessel - uniaxial or biaxial stress state shown in the experiment Learning objectives/experiments - measure strains with strain gauges - application of Mohr’s stress circle to determine the principal strain - determine the principal stresses: axial and circumferential stresses by magnitude and direction -- in an open vessel (pipe) -- in a closed vessel (boiler) - comparison of open/closed vessels - determine Poisson’s ratio - investigation of relations between strains, pressure and stresses in a plane biaxial stress state Specification [1] investigation of stresses in a thin-walled vessel under internal pressure [2] cylinder can be used as open pipe or closed vessel [3] strain gauge application on the vessel surface under varying angles [4] hermetically sealed hydraulic system, maintenance-free, for generating the compressive load [5] hydraulic system with hydraulic pump and manometer [6] FL 152 measuring amplifier required [7] software for analysing measured values in FL 152 Technical data Aluminium vessel - length: 400mm - diameter: Ø=75mm - wall thickness: 2,8mm - internal pressure: max. 3,5N/mm2 (35bar) Strain gauge application - 5 strain gauges: half-bridges, 350 Ohm - angular position to the vessel axis: 0°, 30°, 45°, 60°, 90° - gauge factor: 2,00 ±1% - power supply: 10V Manometer - 0...40bar - accuracy: class 1,0 LxWxH: 700x350x350mm Weight: approx. 21kg