Long, thin cylinders, under external pressure

Equation 4-6 is the classical theoretical relationship for long thin cylinders under external pressures. These theoretical values for collapsing pressure are based on considerations of perfect geometry and perfect uniformity in the shell material. In any actual vessel, the idealized condition cannot be obtained and it was found that the collapse of commercial tubing and pipe occured at a critical pressure, approximately 27% less than the theoretical critical pressure. Using a safety factor of 4 for equation 4-5 we obtain... 

Elastic Stability of long, Thin Cylinders under External Pressure I he sohflion t< (his dilTerential ( ((iialion is ... 

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See also in sourсe #XX -- [ ]

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