Strain gauges are devices used to measure axial strain in a given direction. Assuming that you can attach as many string gauges as you wish (i.e. measure the strain in as many directions as you wish) at a point:
a) Can you measure all of the components of strain in the 3D strain matrix? Explain.
b) If so, what is the minimum number of strain gauges required, and what is a possible arrangement?
Solution provides steps necessary to calculate each question.