Hi Guys, I have been given a lab report to complete on Torsion of a beam. - Beam was subjected to torsion under increments of weight - Strain gauge rosette was placed, A B and C where there is 90 deg between A and C, B at 45 deg in between. - The angle from Gauge A and the "x" axis was given as 28 deg I have predicted a set of readings for A, B and C. Now I have to construct a Mohr's circle from these values, relative to the shaft axis and find principal strains, principle direction and max sheer strain. So far, I used these to compute the strain readings to values for the mohrs circle. Then, I used these to find the Principal Directions But then I am not sure how to use these equations for the ACTUAL orientation of the gauges/strains when I see these two If anybody has any ideas, I would be eternally grateful. I have been to tutors but they have been particularly unhelpful. If anyone prefers to PM or Skype just let me know and I can explain my work so far.