Buckling of pressurized spherical shells containing a through-thickness defect. (May 2020)
- Record Type:
- Journal Article
- Title:
- Buckling of pressurized spherical shells containing a through-thickness defect. (May 2020)
- Main Title:
- Buckling of pressurized spherical shells containing a through-thickness defect
- Authors:
- Yan, Dong
Pezzulla, Matteo
Reis, Pedro M. - Abstract:
- Highlights: A thickness defect in a spherical shell can give rise to three distinct buckling regimes involving local buckling at the defect and global buckling of the entire shell. The resulting buckling behavior has been observed and analyzed through precision model experiments, finite element simulations, and a reduced axisymmetric shell model. The role of a thickness defect in dictating the buckling behavior of spherical shells is systematically studied over a wide parameter space, yielding quantitative results on buckling regimes and critical buckling conditions, related to the defect geometry. These features are entirely governed by the geometric parameters of the defect, and independent of the radius-to-thickness ratio of the shell. Graphical abstract: Abstract: We present a study on the pressure buckling of thin, elastic spherical shells containing a thickness defect. Methodologically, we combine precision model experiments, finite element simulations, and a reduced axisymmetric shell model. We observe qualitatively different buckling behavior by varying the geometry of the defect: either one buckling event or two events comprising local buckling at the defect and global buckling of the entire shell. We systematically analyze the loading path for the imperfect shell under prescribed pressure or volume change and identify three buckling regimes. We then explore a wide parameter space to study the dependence of the buckling regimes on the defect geometry, thus obtainingHighlights: A thickness defect in a spherical shell can give rise to three distinct buckling regimes involving local buckling at the defect and global buckling of the entire shell. The resulting buckling behavior has been observed and analyzed through precision model experiments, finite element simulations, and a reduced axisymmetric shell model. The role of a thickness defect in dictating the buckling behavior of spherical shells is systematically studied over a wide parameter space, yielding quantitative results on buckling regimes and critical buckling conditions, related to the defect geometry. These features are entirely governed by the geometric parameters of the defect, and independent of the radius-to-thickness ratio of the shell. Graphical abstract: Abstract: We present a study on the pressure buckling of thin, elastic spherical shells containing a thickness defect. Methodologically, we combine precision model experiments, finite element simulations, and a reduced axisymmetric shell model. We observe qualitatively different buckling behavior by varying the geometry of the defect: either one buckling event or two events comprising local buckling at the defect and global buckling of the entire shell. We systematically analyze the loading path for the imperfect shell under prescribed pressure or volume change and identify three buckling regimes. We then explore a wide parameter space to study the dependence of the buckling regimes on the defect geometry, thus obtaining a phase diagram with quantitative relationships between critical buckling pressures and defect geometry. We find that the global buckling becomes insensitive to the defect beyond a critical value of its amplitude, and we demonstrate that the buckling regimes are governed by the three geometric parameters of the defect, namely its width, amplitude and the width of the transition region across the edge of the defect. … (more)
- Is Part Of:
- Journal of the mechanics and physics of solids. Volume 138(2020)
- Journal:
- Journal of the mechanics and physics of solids
- Issue:
- Volume 138(2020)
- Issue Display:
- Volume 138, Issue 2020 (2020)
- Year:
- 2020
- Volume:
- 138
- Issue:
- 2020
- Issue Sort Value:
- 2020-0138-2020-0000
- Page Start:
- Page End:
- Publication Date:
- 2020-05
- Subjects:
- Shell buckling -- Thickness defect -- Knockdown factor -- Buckling regimes
Mechanics, Applied -- Periodicals
Solids -- Periodicals
Mechanics -- Periodicals
Mécanique appliquée -- Périodiques
Solides -- Périodiques
Mechanics, Applied
Solids
Periodicals
531.05 - Journal URLs:
- http://www.sciencedirect.com/science/journal/00225096 ↗
http://www.elsevier.com/journals ↗ - DOI:
- 10.1016/j.jmps.2020.103923 ↗
- Languages:
- English
- ISSNs:
- 0022-5096
- Deposit Type:
- Legaldeposit
- View Content:
- Available online (eLD content is only available in our Reading Rooms) ↗
- Physical Locations:
- British Library DSC - 5016.000000
British Library DSC - BLDSS-3PM
British Library HMNTS - ELD Digital store - Ingest File:
- 13620.xml