The polyethylene liner of a settling pond is subjected to stresses (x = 350 psi, (y = 112 psi, and Txy= -120 psi, as shown by the plane-stress element in the first part of the figure.
Determine the normal and shear stresses acting on a seam oriented at an angle of 30o to the element, as shown in the second part of the figure. Show these stresses on a sketch of an element having its sides parallel and perpendicular to the seam.

Transcribed Image Text:

112 psi 30 350 psi Seam 120 psi