question archive A strain gage with a nominal resistance of 350 Ω and a gauge factor of 2
A strain gage with a nominal resistance of 350 Ω and a gauge factor of 2
Subject:Mechanical EngineeringPrice: Bought3
A strain gage with a nominal resistance of 350 Ω and a gauge factor
of 2.04 is attached to a beam. Your plan is to use it in a quarter bridge circuit. The other three resistors have nominal resistances of 350 Ω. The supply voltage is 10.00 V. Under no load conditions, the bridge has an output voltage of 5.00 mV. When a load is applied to the beam, the output voltage is -5.50 mV. The Young's modulus of the beam is 87.0 GPa.
a)Draw the Wheatstone bridge circuit such that positive changes in the strain gauge resistance leads to a positive change in output voltage when in tension (make sure that you clearly indicate the location of the strain gauge in the bridge circuit).
b)Calculate the axial strain on the beam in microstrain.
c)What is the axial stress of the beam in MPa? Is this portion of the beam in tension or compression? Explain.
