b. A cantilevered beam of length 120 mm, is 25 mm wide and 6 mm thick as shown in Figure 2. The beam is subjected to a fluctuating end load such that the ratio of the maximum bending moment to mean bending moment is 3. The yield stress of the beam material is 250 N/mm² and the endurance limit is 85 N/mm?. i Detemine the maximum permissible end load that can act on the beam without causing failure. ii If a factor of safety of 2.5 is now applied to the endurance stress, determine the maximum permissible end load on the beam. What is the ratio of the maximum permissible end load calculated in part 1b (ii) above to that calculated in part lb (i) above?

b. A cantilevered beam of length 120 mm, is 25 mm wide and 6 mm thick as shown in Figure 2. The beam is subjected to a fluctuating end load such that the ratio of the maximum bending moment to mean bending moment is 3. The yield stress of the beam material is 250 N/mm² and the endurance limit is 85 N/mm?. i Detemine the maximum permissible end load that can act on the beam without causing failure. ii If a factor of safety of 2.5 is now applied to the endurance stress, determine the maximum permissible end load on the beam. What is the ratio of the maximum permissible end load calculated in part 1b (ii) above to that calculated in part lb (i) above?

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Concept explainers

Slope and Deflection

The slope in a deflected beam is described as an angle in radians made by the tangent of the section with the original axis of the beam. The deflection at any point on the axis of the beam is defined as the lateral displacement of the point before and after loading.

Question

b. A cantilevered beam of length 120 mm, is 25 mm wide and 6 mm thick as shown in Figure 2. The
beam is subjected to a fluctuating end load such that the ratio of the maximum bending moment to
mean bending moment is 3. The yield stress of the beam material is 250 N/mm² and the endurance
limit is 85 N/mm?.
i.
Detemine the maximum permissible end load that can act on the beam without causing
failure.
If a factor of safety of 2.5 is now applied to the endurance stress, determine the maximum
permissible end load on the beam.
ii.
What is the ratio of the maximum permissible end load calculated in part 1b (ii) above to that
calculated in part 1b (i) above?
111.
Fluctuating
end load
6 mm
120 mm
Figure 2

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