1. The stress at a point has σx = 13 ksi (T), σy = 18 ksi (T) and τxy = +6 ksi. (3 pts) Determine the principal stresses for the plane stress problem.(3 pts) Calculate the maximum shear stress. (4 pts) Show the results on the diagram below.
2. Three external torques are applied to shaft ABCDE shown below. With G = 80GPa and the maximum shear stress is limited to 24 MPa determine
(6) a. T applied in the direction shown.
(4) b. Rotation of section at E with respect to the no-load position.
3. Two channels are used to build up the section shown in Fig 3b. The properties of the single cross-section are given below in Fig 3a. The structural steel has a tensile or compressive yield strength of = 248 MPa and a shear strength of 150 MPa. The beam assembly is supported and loaded as shown in Fig. 3c. Considering the lower beam ABCD,
a. Determine Iz for the combined section.
(3) b. Determine the maximum allowable load P based on the tensile or compressive yield strength.
(3) c. Determine the maximum allowable load P based on the shear strength.
1 Mi = -20 kip-in
What is the maximum tensile and compressive stresses in the stems? Show where they occur.
2. My = +10 kip-in
What is the maximum tensile and compressive stresses in the stems? Show where they occur Determine maximum tensile stress in section due to either moment.
Attachment:- Formula Sheet1 for exam 2.pdf