Strain Transformation Results

Measurements

Calculations

For Square 1:

Alternatively, one could determine the principals and maximum shear using Mohr's circle.  Ideally, all four circles would be the same.

Summary of Results

Discussion Questions

1. How do the calculated angles of rotation compare with the angles of rotation measured at the beginning of the experiment?
    
2. Why are the principal strains similar for all four square orientations?
    
3. Do the calculated maximum-shear-strain values agree with the measured shear strains in the four orientations?
    
4. Which orientation had the largest measured shear strain?  The smallest?  Why is this?
    
5. Do your results make sense?