An element of an orthotropic lamina is subjected to an off-axis shear stress xy at an angle as shown in Figure 2.21. (a) For an angle = 45, determine the value of the applied shear stress xy that would generate the follow- ing stresses along the 1,2 axes: 1 = 1000 MPa, 2 = 1000 MPa, and 12 = 0