Pressure testing of large-scale torispherical heads subject to knuckle buckling |
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| Affiliation: | 1. Swedish University of Agricultural Sciences, Department of Forest Biomaterials and Technology, Biomass Technology Centre, 901 83 Umeå, Sweden;2. Aalto University, School of Chemical Technology, Department of Chemistry and Materials Science, 02150 Espoo, Finland;3. Umeå University, Department of Physics, 901 87 Umeå, Sweden;4. Holmen AB, 891 80 Örnsköldsvik, Sweden;5. Iggesund Paperboard AB, Iggesund Mill, Development Department, PO Box 15, 825 80 Iggesund, Sweden;6. University of Natural Resources and Life Sciences, Institute of Chemical and Energy Engineering, Department of Material Sciences and Process Engineering, Muthgasse 107, 1190 Vienna, Austria;1. Faculty of Civil Engineering, K. N. Toosi University of Technology, Tehran, Iran;2. Faculty of Mechanical Engineering, Ferdowsi University, Mashhad, Iran;1. Department of Mechanical Engineering, Ferdowsi University of Mashhad, Iran;2. Department of Mechanical and Industrial Engineering, Ryerson University, 350 Victoria Street, Toronto, Ontario M5B 2K3, Canada |
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| Abstract: | Two fabricated steel torispherical heads were tested under internal pressure to determine their buckling and rupture strengths. Both models had cylindrical diameters of 192 in, knuckle radii of 32·64 in, sphere radii of 172·8 in and measured thicknesses of 0·196 in (Model 1) and 0·270 in (Model 2).For Model 1, initial buckling was noted at 58 psi. Pressurization was continued to rupture at 229 psi. During the test, 14 buckles formed and a maximum strain of 3·5% was recorded in the spherical portion of the model.For Model 2, initial buckling was noted at 106 psi. Pressurization was continued to rupture at 332 psi. During the test 14 buckles formed and maximum strains of 4·3–4·7% were recorded in the spherical portion of the model. |
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