Use R=78 Solve only for part a
Extracted text: At a point on a structural member, the values of measured coordinate strains at an instant are: Ex = (2R) µ ; &y = (-3R) µ ; Yy = (2.5R) µ | (i) Sketch a deformed strain element under the applied state of strain. (ii) Apply the concept of strain transformation to determine, using transformation equations; (a) The orientation of principal planes and the values of max. and min. principal strains. Also sketch the deformed strain element showing principal planes labelled with max. and min. principal strain values on the respective planes. (b) The orientation of max. in-plane shear strains and the values of max. and min. in plane shear strains. Also sketch the deformed and distorted strain element labeled with strain values on the respective planes.