Mehcanics of Materials Questions for HW #6

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

This preview shows pages 1–5. Sign up to view the full content.

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.

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
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,

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
This is the end of the preview. Sign up to access the rest of the document.

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....
View Full Document

{[ snackBarMessage ]}

### What students are saying

• As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

Kiran Temple University Fox School of Business ‘17, Course Hero Intern

• I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

Dana University of Pennsylvania ‘17, Course Hero Intern

• The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

Jill Tulane University ‘16, Course Hero Intern