Sturdy, compact, self contained bench top unit for determining the surface strains and deflections of a flexible diaphragm under varying pressures. Round Diaphragm Apparatus the diaphragm is flexed, the strain gauge output is fed into a digital display, which is supplied. An aluminium diaphragm is clamped rigidly around its outer edge, creating a volume underneath its surface into which oil is filled. On the top surface of the diaphragm are attached 8 precision strain gauges at differing orientations.
An analogue pressure indicator monitors the pressure, whilst an electronic pressure sensor monitors the same pressure but gives an output signal to the digital display. The force applied to the diaphragm is created by pressurising the oil underneath the diaphragm using a fine adjustment control mechanism.
Experimental Capabilities:
Measurement of diaphragm disc surface strain using strain gauges
Determination of circumferential strain
Diaphragm surface profile
Measurement of diaphragm disc deflection with a dial gauge
Determination of radial strain
Comparison of actual and theoretical results
Mohr Circl
Strain gauge technology and uses.
