Questions from Mechanics


Q: A wood beam reinforced using two channels is subjected to a positive

A wood beam reinforced using two channels is subjected to a positive bending moment Mz = 25 kip-ft. Calculate the largest tensile and compressive stresses in the wood and steel if Ew = 1500 ksi and Es...

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Q: A wood beam reinforced by an aluminum channel section is shown in

A wood beam reinforced by an aluminum channel section is shown in the figure. The beam has a cross section of dimensions 150 mm × 250 mm, and the channel has a uniform thickness of 6.5 mm...

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Q: A composite beam is constructed using a steel plate (0.

A composite beam is constructed using a steel plate (0.5 in. × 6 in.) with two wood beams (3 in. × 6 in.) on either side. The wood and steel are securely fastened to act as a...

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Q: A wood beam is strengthened using two steel plates as shown in

A wood beam is strengthened using two steel plates as shown in Fig. a. The beam has simple supports and an overhang and is subjected to a point load and a uniform load as shown in Fig. b....

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Q: Dimensions of cross section: b = 180 mm, t =

Dimensions of cross section: b = 180 mm, t = 12 mm, h = 420 mm, h1 = 380 mm, and V = 125 kN. Data for Problem 2: A wide-flange beam (see figure) is subjected to a shear force V. Using the dimensions...

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Q: A composite beam consisting of fiberglass faces and a core of particle

A composite beam consisting of fiberglass faces and a core of particle board has the cross section shown in the figure. The width of the beam is 2.0 in., the thickness of the faces is 0.10...

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Q: A wood beam with cross-sectional dimensions 200 mm × 300

A wood beam with cross-sectional dimensions 200 mm × 300 mm is reinforced on its sides by steel plates 12 mm thick (see figure). The moduli of elasticity for the steel and wood are Es = 1...

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Q: A hollow box beam is constructed with webs of Douglas-fir

A hollow box beam is constructed with webs of Douglas-fir plywood and flanges of pine, as shown in the figure in a cross-sectional view. The plywood is 1 in. thick and 12 in. wide; the flanges are 2 i...

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Q: A round titanium tube of outside diameter d2 and a copper core

A round titanium tube of outside diameter d2 and a copper core of diameter d1 are bonded to form a composite beam, as shown in the figure. (a) Derive formulas for the allowable bending moment M that c...

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Q: A beam with a guided support and 10-ft span supports

A beam with a guided support and 10-ft span supports a distributed load of intensity q = 660 lb/ft over its first half (see figure part a) and a moment Mo = 300 ft-lb at joint B. The beam consists of...

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