Consider a state of plane stress with principal stresses of 14MPa and -6MPa. The normal stress in the x-direction is 12MPa.
a. Find the remaining stress components in the x-y coordinate system. Draw a complete 2D stress element in the x-y coordinate system (note: there are two possible answers--either is fine).
b. Draw and label a principally oriented stress element.
c. Draw and label a stress element for a coordinate system rotated 45 degrees clockwise from the x-y coordinate system.