Bài tập SBVL1 CSU - Chương 4 (4.1 đến 4.5)

• Đăng bởi: lethithanhbinh
• Sinh viên
• 18/10/2017

4.1. Knowing that the couple shown acts in a vertical plane,determine the stress at (a) point A, (b) point B. (Hình 41)

4.2. Knowing that the couple shown acts in a vertical plane,determine the stress at (a) point A, (b) point B. (Hình 42)

4.3. A nylon spacing bar has the cross section shown. Knowing that the allowable stress for the grade of nylon used is 24 MPa, determine the largest couple MZ that can be applied to the bar (Hình 43).

4.4. A beam of the cross section shown is extruded from an aluminum alloy for which s_Y = 250 MPa and s_U = 450 MPa. Using a factor of safety of 3.00,determine the largest couple that can be applied to the beam when it is bent about the z axis. (Hình 44)

4.5. Two W4 3 13 rolled sections are welded together as shown. Knowing that for the steel alloy used, s_Y  = 36 ksi and s_U = 58 ksi and using a factor of safety of 3.0, determine the largest couple that can be applied when the assembly is bent about the z axis. (Hình 45)