Strain Guages

Summary

This experiment was used to evaluate the use of a strain gauge as a method to both predict unknown masses, and the Young’s modulus of a beam itself. Multiple versions of strain gauges, called potential divider, quarter-bridge (with and without amplifiers) and half-bridge configurations were used. A best estimate of 256.1g for the mass was obtained (a 8.3% overestimate), and a value of 171GPa was obtained for the Young’s modulus, which suggests that the beam was a type of steel (likely stainless). Sources of error such as incorrect balancing and inaccurate measurements were considered, to evaluate the suitability of these methods.

 

Data

 

Report

Due to the lab being repeated for other years, the full report has not been uploaded. It is however available on request, using the contact details available.