Mehcanics of Materials Questions for HW #6

# Mehcanics of Materials Questions for HW #6 - (b if the bar...

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4.42 The 6 x 12-in timber beam has been strengthened by bolting to it the steel reinforcement shown. The modulus of elasticity for wood is 1.8 x 10 6 psi and for steel 29 x 10 6 psi. Knowing that the beam is bent about a horizontal axis by a couple of moment M = 450 kip in, determine the maximum stress in the (a) the wood, (b) the steel.

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4.65 The allowable stress used in the design of a steel bar is 80 MPa. Determine the largest couple M that can be applied to the bar (a) if the bar is designed with grooves having semicircular portions of radius r = 15 mm, as shown in figure a,

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Unformatted text preview: (b) if the bar is redesigned by removing the material above the grooves as shown in figure b. 4.142 For the loading shown, determine the stress at points A and B. 4.145 An axial load P of magnitude 50 kN is applied as shown to a short section of W150 x 24 rolled-steel member. Determine the largest distance for a for which the maximum compressive stress does not exceed 90 MPa. 5.162 Knowing that the allowable normal stress for the steel used is 24 ksi, select the most economical wide-flange beam to support the loading shown....
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## This note was uploaded on 04/07/2008 for the course ENSC 301 taught by Professor Nowak during the Spring '08 term at Gonzaga.

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Mehcanics of Materials Questions for HW #6 - (b if the bar...

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