A steel bar 300 mm long and having 24 mm diameter, is turned uuwn to 18 mm diameter forone-third of its length. It is heated at 30°C above room temperature, clamped at both ends andthen allowed to cool to room temperature. If the distance between the clamps is unchanged,the maximum stress in bar [a = 12.5 x 10/°C and E = 200 GN/m2] isQ.3

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Answered: A steel bar 300 mm long and having 24…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

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A 2.5m steel rod with a cross sectional area of 1250m^2 is secured between rigid supports at both ends. If there is no stress of 30°C, E = 200000MPa. (a)Compute the stress when the temperature drops to 0°C, if it has a coefficient of thermal expansion of 0.0000117 m/m°C. (b)Compute the strain of the rod if the rod supports yield by 0.800mm as temperature drops. (c)Compute the stress in the rod if the support yield and moves together a distance of 0.800mm as the temperature drops.
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A steel rod with a cross-sectional area of 0.25in .^ 2 is stretched between two fixed points. The tensile load at 0.7 deg * Fis * 1200 lb. What will be the stress at 0 deg * F ? At what temperature will the stress be zero? Assume alpha = 6.5 * 10 ^ - 6 in ./(in*^ F) and E = 29 * 10 ^ 4 psi.
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