May 2012
Intermediate to advanced
485 pages
10h 45m
English
Content preview from Strength of Materials
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11.7 FACTOR OF SAFETY
Factor of safety (FS) with reference to load is defined as the ratio of critical load to safe load.
SOLVED PROBLEM 11.11
A solid round bar 4.5 m long and 60 mm in diameter was found to extend 4.6 mm under a tensile load of 60 kN. This bar is used as a strut with both ends fixed. Determine the buckling load for the bar and also the safe load taking factor of safety as 4.
Solution:
Given data: Diameter of the bar = 60 mm, length = 4.5 m, tensile load = 60 kN, FS = 4 and deflection = 4.6 mm.
| Area of the bar, | 
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