AN EXPERIMENTAL INVESTIGATION OF INSTANTANEOUS-COLLAPSE AND CREEP-BUCKLING CHARACTERISTICS OF CYLINDRICAL SHELLS

Technical Report · Sun Mar 01 04:00:00 EST 1964

DOI:https://doi.org/10.2172/4066949· OSTI ID:4066949

Greenstreet, B. L.; Corum, J. M.

Instantaneous-collapse and creep, or time-dependent, buckling tests were conducted on nominally 8.0-in.-OD by 0.25-in.-wall and 4.0-in.-OD by 0.12-in.- wall specimens made from commercial pipe and tubing. The material for the larger specimens was type 304 stainless steel, while the smaller ones were made of both type 304 and type 347 stainless steel. The length chosen in each case was infinite from the buckling standpoint. The instantaneous-collapse test temperatures ranged from room temperature to 1200 deg F, and all the time- dependent collapse tests were made at 1200 deg F. The results show that tube out- of-roundness is a major factor in determining the collapse pressure. They also show that, under creepcollapse conditions, the critical pressure decreases rapidly with time, initially. This decrease is then followed by a leveling off, with very little change after the first few hundred hours. Although the load- carrying abilities of the 8.0-in.-OD specimens exceeded those for 4.0in.-OD specimens of the same material for instantaneous and short-time collapse conditions, the critical pressures were about the same in the two cases for collapse after several hundred hours. The ratio of experimental values to the allowable working pressure given by the ASME Boiler and Pressure Vessel Code, Section VIII, Rules for Construction of Unfired Pressure Vessels, ranges from about 6.0 for instantaneous buckling to about 3.4 at 3400 hr in the case of the 8.0-in.-OD tubes. For the 4.0-in.-OD type 304 stainless steel tubes, the ratio is about 4.5 for instantaneous buckling and about 3.4 for buckling after a few thousand hours. (auth)

• Research Organization: Oak Ridge National Lab., Tenn.
• DOE Contract Number: W-7405-ENG-26
• NSA Number: NSA-18-016159
• OSTI ID: 4066949
• Report Number(s): ORNL-3555
• Country of Publication: United States
• Language: English

Related Subjects

CONFIGURATION
CREEP
CYLINDERS
DEFORMATION
ENGINEERING
FAILURES
HIGH TEMPERATURE
PIPES
PLANNING
PRESSURE
SHELLS
STAINLESS STEELS
TEMPERATURE
TUBES