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Locally flattened or dented domes under external pressure
Abstract The paper provides comparisons of sensitivity of buckling pressures to initial shape imperfections, for the case of externally pressurised steel domes. A priori defined deviations from perfect shape include: Legendre polynomials, increased-radius patch, and localised inward dimple. The latter is created by a concentrated force acting radially. In this case the effects of spring back and/or annealing of the dented patch and the surrounding area on the load carrying capacity are assessed. Some of the elastic solutions related to the lower-bound approach are compared with the available experimental data.
Highlights Eigenmode imperfections may not represent the worst scenario. Lower-bound, increased radius imperfections nearly always on safe side. Force Induced Dimples offer alternative approach: safe and computationally superior.
Locally flattened or dented domes under external pressure
Abstract The paper provides comparisons of sensitivity of buckling pressures to initial shape imperfections, for the case of externally pressurised steel domes. A priori defined deviations from perfect shape include: Legendre polynomials, increased-radius patch, and localised inward dimple. The latter is created by a concentrated force acting radially. In this case the effects of spring back and/or annealing of the dented patch and the surrounding area on the load carrying capacity are assessed. Some of the elastic solutions related to the lower-bound approach are compared with the available experimental data.
Highlights Eigenmode imperfections may not represent the worst scenario. Lower-bound, increased radius imperfections nearly always on safe side. Force Induced Dimples offer alternative approach: safe and computationally superior.
Locally flattened or dented domes under external pressure
Błachut, J. (author)
Thin-Walled Structures ; 97 ; 44-52
2015-08-25
9 pages
Article (Journal)
Electronic Resource
English
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