Determine the equivalent state of stress on an element which represents (a) the principal stresses, and (b)

Question:

Determine the equivalent state of stress on an element which represents (a) the principal stresses, and (b) the maximum in-plane shear stress and the associated average normal stress. Also, for each case, determine the corresponding orientation of the element with respect to the element shown and sketch the results on the element.

|30 ksi 10 ksi