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A rail line is laid so that there is no stress in rails at 15°C. The rails are 50 m long. α = 11.7 × 10-6/°C and E = 2.3 × 105 N/mm2 Find the following: 1. The stress in rails at 55 º C if there is no allowance for expansion. 2. The stress in the rails at 55 º C if there is an expansion allowance of 8 mm per rail. 3. The expansion allowance if the stress in the rail is to be zero when the temperature is 55 º C.

A rail line is laid so that there is no stress in rails at 15°C. The rails are 50 m long. α = 11.7 × 10-6/°C and E = 2.3 × 105 N/mm2 Find the following: 1. The stress in rails at 55 º C if there is no allowance for expansion. 2. The stress in the rails at 55 º C if there is an expansion allowance of 8 mm per rail. 3. The expansion allowance if the stress in the rail is to be zero when the temperature is 55 º C.

Elements Of Electromagnetics
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 rail line is laid so that there is no stress in rails at 15°C. The rails are 50 m long. α = 11.7 × 10-6/°C and E = 2.3 × 105 N/mm2

Find the following:

1. The stress in rails at 55 º C if there is no allowance for expansion.

2. The stress in the rails at 55 º C if there is an expansion allowance of 8 mm per rail.

3. The expansion allowance if the stress in the rail is to be zero when the temperature is 55 º C. 

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