7-15 If the applied shear force V = 18 kip, determine the maximum shear stress in the member. 1 in. 1 in. 1 in. 3 in. 3 in.

Determine principal stress and maximum shear stress. 200 MPa 500 MPa 350 MPa

Flexural Stress

Q9 The bars of the truss each have a cross-sectional area of 780 mm?. If the maximum average normal stress in any bar is not to exceed 140 MPa, determine the maximum magnitude P of the loads that can be applied to the truss. B 0.9 m E -1.2 m- -1.2 m- 0.75 P

D

Question 1. The plane NN' makes an angle 8-30" with respect to the cross section of theprismatic bar shown in Figure. The dimensions of the rectangularcross section of the bar are 3cmx6cm. Under the action of an axial tensile load P, the normal stress of NN' plane is o, =60 MPa. a.Determine the value of axial load P b.Determine the shear stress t on the NN' plane c. Determine the maximum shear stress in the bar. P N'

The steel beam has the cross-sectional are shown. If w = 5kip/ft, determine the absolute maximum bending stress in the beam.

8-47. Determine the state of stress at point A, and show the results on a differential volume element located at this point. 100 KN 200 mm 10 kN 200 mm 20 kN 30 mm Probs. 8-47 B X

Problem 3: Member AC is subjected to a vertical force of 3 kN. Cross sectional area of tie rod is 400 mm? and the contact area at C is 650 mm?. O Determine the force in the tie rod if the average compressive stress at C is equal to the average tensile stress in the tie rod AB. ® Determine the compressive force at C. Determine the position x of the 3 kN force from A. 3 kN 200 mm

The internal shear force V at a certain section of an aluminum beam is 40 kN. The beam's centroid is located 54.40 mm above the bottom surface of the beam, and the moment of inertia is l₂ = 398,300 mm4. Determine the shear stress at point H, which is located 30 mm above the bottom surface of the beam. 30 mm 75 mm y H 5 mm 5 mm 75 mm