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8. [-/7 Points] A cantilever beam = 2 ft) with a rectangular cross section (b= 3.5 in., h = 12 in.) supports an upward load P = 63 kips at its free end. (Consider only the in-plane stresses and disregard the weight of the beam.) Stress element at L/2 σy = X dy = Txy = A 02 %₂ = Tmax= DETAILS GGMECHMAT9 8.4.007. 01 %₁ x 02 I max L/2- (a) Find the state of stress (y and Txy in ksi) on a plane-stress element at L/2 that is d = 8 in. up from the bottom of the beam. (Enter your answers in ksi. For the normal stresses, use the deformation sign convention. For the shear stress, use the sign convention for shear stresses.) ksi ksi ksi = Find the principal normal stresses and maximum shear stress. (Enter your answers in ksi. For the normal stresses, use the deformation sign convention. For the shear stress, enter the magnitude.) %1 = ksi ksi 1/2 ksi B b Show these stresses on sketches of properly oriented elements. (Submit a file with a maximum size of 1 MB.) Choose File No file chosen Ⓡ (b) Repeat part (a) if an axial compressive centroidal load N = 40 kips is added at B. σx = av = Txy = = ksi ksi ksi ksi ksi ksi MY NOTES Show these stresses on sketches of properly oriented elements. (Submit a file with a maximum size of 1 MB.) Choose File No file chosen ASK YOUR TEACHER