XCII. <i>The collapse of short thin tubes by external pressure</i>

Cook, Gilbert

doi:10.1080/14786442508634806

Cited by 5 publications

(2 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Strain gages were applied to the inside of the rodel by using a "harness 11 -a sheet of graph paper to which the gages were attached. This sheet was trimmed to exact dimensions, rolled into a cylinder, and positioned inside the model with glue applied to the gages.…”

Section: -Teat Proceduresmentioning

confidence: 99%

Elastic Instability of Relatively Thick Circular Cylindrical Shells Subjected to Hydrostatic Pressure

Barry

Ballow

1964

Naval Engineers Journal

View full text Add to dashboard Cite

Experimental investigations were undertaken to determine the collapse pressures of relatively thick circular cylindrical shells subjected to hydrostatic pressure. A total of twenty-three fiber glass reinforced plastic cylinders with thickness to diameter ratios ranging from 0.05 to 0.09 was tested to determine collapse pressures and the effective modulus of elasticity of the material. The length to diameter ratio was kept constant.Results were plotted non-dimensionally with P/E as the ordinate

show abstract

Section: -Teat Proceduresmentioning

confidence: 99%

Elastic Instability of Relatively Thick Circular Cylindrical Shells Subjected to Hydrostatic Pressure

Barry

Ballow

1964

Naval Engineers Journal

View full text Add to dashboard Cite

show abstract

“…The implosion pressure and mode number for a given model are determined from the mode curve with the lowest pressure at the design value of L/D 0 . There are numerous additional theoretical and experimental studies of the stability limit of cylindrical shell structures, including the work by Carman [4,5], Carman & Carr [6], Cook [7], Southwell [8], Winden [9] and Saunders & Windenburg [10].…”

Section: Introductionmentioning

confidence: 99%

The implosion of cylindrical shell structures in a high-pressure water environment

2013

View full text Add to dashboard Cite

The implosion of cylindrical shell structures in a highpressure water environment is studied experimentally. The shell structures are made from thin-walled aluminium and brass tubes with circular cross sections and internal clearance-fit aluminium end caps. The structures are filled with air at atmospheric pressure. The implosions are created in a high-pressure tank with a nominal internal diameter of 1.77 m by raising the ambient water pressure slowly to a value, P c , just above the elastic stability limit of each shell structure. The implosion events are photographed with a high-speed digital movie camera, and the pressure waves are measured simultaneously with an array of underwater blast sensors. For the models with larger values of length-to-diameter ratio, L/D 0 , the tubes flatten during implosion with a two-lobe (mode 2) cross-sectional shape. In these cases, it is found that the pressure wave records scale primarily with P c and the time scale R i √ ρ/P c (where R i is the internal radius of the tube and ρ is the density of water), whereas the details of the structural design produce only secondary effects. In cases with smaller values of L/D 0 , the models implode with higher-mode cross-sectional shapes. Pressure signals are compared for various mode-number implosions of models with the same available energy, P c V, where V is the internal air-filled volume of the model. It is found that the pressure records scale well temporally with the time scale R i √ ρ/P c , but that the shape and amplitudes of the pressure records are strongly affected by the mode number.

show abstract