An element in plane stress on the surface of an automobile drive shaft is subjected to stresses of σ_x = -45 MPa and π_xy = 39 MPa. It is known that one of the principal stresses equals 41 MPa in tension.

(a) Determine the stress σ_y.

(b) Determine the other principal stress and the orientation of the principal planes, then show the principal stresses on a sketch of a properly oriented element.

Transcribed Image Text:

T P %₂ T 139 MPa 45 MPa