Questions from Mechanics

Q: A box beam is constructed of four wood boards as shown in

A box beam is constructed of four wood boards as shown in the figure part a. The webs are 8 in. × 1 in. and the flanges are 6 in. × 1 in. boards (actual dimensions), joined b...

Q: Wires B and C are attached to a support at the left

Wires B and C are attached to a support at the left-hand end and to a pin-supported rigid bar at the right-hand end (see figure). Each wire has cross-sectional area A = 0.03in2 and modulus of elastici...

Q: A propped cantilever beam of length L = 54 in with a

A propped cantilever beam of length L = 54 in with a sliding support supports a uniform load of intensity q (see figure). The beam is made of steel (σY = 3 6ksi) and has a rectangular cross...

Q: A steel beam of rectangular cross section is 40 mm wide and

A steel beam of rectangular cross section is 40 mm wide and 80 mm high (see figure). The yield stress of the steel is 210 MPa. (a) What percent of the cross-sectional area is occupied by the elastic c...

Q: Calculate the shape factor f for the wide flange beam shown in

Calculate the shape factor f for the wide flange beam shown in the figure if h = 12.2 in, b = 8.08 in, tf = 0.64 in, and tw = 0.37 in.

Q: Solve the preceding problem for a wide flange beam with h =

Solve the preceding problem for a wide flange beam with h = 404 mm, b = 140 mm, tf = 11.2 mm, and tw = 6.99 mm. Data from Problem 5: Calculate the shape factor f for the wide flange beam shown in t...

Q: Determine the plastic modulus Z and shape factor f for a W

Determine the plastic modulus Z and shape factor f for a W 12 × 14 wide-flange beam. Obtain the cross-sectional dimensions and section modulus of the beam in Appendix F.

Q: The symmetric truss ABCDE shown in the figure is constructed of four

The symmetric truss ABCDE shown in the figure is constructed of four bars and supports a load P at joint E. Each of the two outer bars has a cross-sectional area of 0.307 in2, and each of the two inne...

Q: Five bars, each having a diameter of 10 mm, support

Five bars, each having a diameter of 10 mm, support a load P as shown in the figure. Determine the plastic load PP if the material is elastoplastic with yield stress σY = 250 MPa.

Q: A circular steel rod AB with a diameter d = 0.

A circular steel rod AB with a diameter d = 0.60 in is stretched tightly between two supports so that (initially) the tensile stress in the rod is 10 ksi (see figure). An axial force P is then applied...