Imperfections and energy barriers in shell buckling

@article{Hutchinson2018ImperfectionsAE,
  title={Imperfections and energy barriers in shell buckling},
  author={John W. Hutchinson and J. M. T. Thompson},
  journal={International Journal of Solids and Structures},
  year={2018}
}
Abstract The elastic buckling of shell structures such as spherical shells subject to external pressure and cylindrical shells loaded in axial compression is highly sensitive to imperfections and often catastrophic. Recent studies of spherical shells have provided accurate quantitative results for the relation between the buckling pressure and the amplitude and shape of geometric imperfections and, additionally, quantitative results for the energy barrier that must be overcome to buckle the… Expand
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Nonlinear dynamics of spherical shells buckling under step pressure
TLDR
Damping plays an important role in dynamic buckling because of the time-dependent nonlinear interaction among modes, particularly the interaction between the spherically symmetric ‘breathing' mode and the buckling mode. Expand
Incomplete reduced stiffness method for imperfection sensitivity of cylindrical shells
Abstract Cylindrical shells are commonly used in the industry structures, and they are prone to buckling under axial compression load. However, the practical critical loads are often lower than the… Expand
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Abstract The prediction of the critical buckling conditions of shell structures is plagued by imperfection sensitivity. Non-destructive testing through point-load probing has been recently proposed… Expand
Nondestructive Prediction of the Buckling Load of Imperfect Shells.
TLDR
This study introduces a nonlinear description where finite-amplitude perturbations trigger buckling and provides a new promising framework to understand shell buckling, and more generally, imperfection-sensitive instabilities. Expand
On the imperfection sensitivity and design of spherical domes under external pressure
Abstract Deep spherical shells are often used as pressure vessels in ocean and aerospace engineering. When subjected to external pressure, these thin-walled shells are prone to buckling. The… Expand
Buckling Analyses of Spherical Shells by the Finite Element Method Based on the Willis-Form Equations
TLDR
Buckling analysis of spherical shells under external pressure is a crucial problem in mechanical and aerospace engineering and the buckling loads obtained by classical methods are shown to be underestimated. Expand
Buckling of pressurized spherical shells containing a through-thickness defect
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… Expand
Delayed buckling of spherical shells due to viscoelastic knockdown of the critical load
We performed dynamic pressure buckling experiments on defect-seeded spherical shells made of a common silicone elastomer. Unlike in quasi-static experiments, shells buckled at ostensibly subcritical… Expand
Buckling of a pressurized hemispherical shell subjected to a probing force
We study the buckling of hemispherical elastic shells subjected to the combined effect of pressure loading and a probing force. We perform an experimental investigation using thin shells of nearly… Expand
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References

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