Notations and units:

= Normal strain, = Shear strain, = Angle

Units of the notations are in SI units.

Substitute in two dimensional stress system

Normal strain at an angle from the reference

Shear strain at an angle from the reference

Resultant strain

Angle between normal strain to one plane and resultant strain (angle of obliquity)

Maximum principal strain

Minimum principal strain

Angle of maximum principal strain from the reference plane

Angle of minimum principal strain from the reference plane

Angles of plane where shear strain is maximum

Maximum shear strain

Maximum normal strain on maximum shear plane