کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
308593 | 513558 | 2015 | 9 صفحه PDF | دانلود رایگان |
• 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.
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.
Journal: Thin-Walled Structures - Volume 97, December 2015, Pages 44–52