scholarly journals Approximate solution the problem of low-speed impact of a conical indenter in a cylindrical shell

2019 ◽  
Author(s):  
Alexey Beskopylny ◽  
Andrey Veremeenko ◽  
Elena Kadomtseva ◽  
Jan Celko
Keyword(s):  
Cylindrical Shell ◽  
Approximate Solution ◽  
Low Speed ◽  
Conical Indenter

scholarly journals Structural Design for a 10-GWh SMES Vacuum Vessel

1978 ◽  
Vol 100 (3) ◽  
pp. 263-270
Author(s):  
J. G. Bennett ◽  
C. A. Anderson
Keyword(s):  
Cylindrical Shell ◽  
Approximate Solution ◽  
Elastic Deformation ◽  
Material Properties ◽  
Structural Design ◽  
Shell Thickness ◽  
Construction Cost ◽  
Vacuum Vessel ◽  
Nonlinear Elastic

An approximate solution to the problem of the nonlinear elastic deformation of a periodically point-supported cylindrical shell is obtained. This solution is used to investigate the structural design of the vacuum vesssel for the large underground SMES concept. Vacuum vessel designs are evaluated by varying such parameters as shell thickness, support, spacing, material properties and physical configuration to keep the amount of material used and construction cost to a minimum.

Static Analysis of Thick Laminated Circular Cylindrical Shells

1993 ◽  
Vol 115 (2) ◽  
pp. 193-200 ◽  
Author(s):  
K. Chandrashekhara ◽  
B. S. Kumar
Keyword(s):  
Exact Solution ◽  
Cylindrical Shell ◽  
Approximate Solution ◽  
Circular Cylindrical Shell ◽  
Simply Supported ◽  
Hybrid Laminates ◽  
Shell Panel ◽  
Circular Cylindrical Shells ◽  
Shear Deformation Theories ◽  
Asymmetric Load

An approximate solution for a thick laminated simply supported circular cylindrical shell of revolution and shell panel subjected to asymmetric load has been obtained using elasticity approach. The results obtained from this analysis have been compared with the exact solution. Numerical results have been presented for 3-ply hybrid laminates and (0/90/0) laminates subjected to patch loads. The results have also been compared with some available classical and shear deformation theories to assess the accuracy of these theories.

scholarly journals Buckling of a clamped supported cylindrical shell

2021 ◽  
Vol 8 (2) ◽  
pp. 247-254
Author(s):  
Grigory A. Nesterchuk ◽  
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Cylindrical Shell ◽  
Approximate Solution ◽  
Critical Pressure ◽  
Ritz Method ◽  
Elastic Cylindrical Shell ◽  
Optimal Distribution ◽  
The Finite Element Method ◽  
Thin Elastic Cylindrical Shell

The paper considers problem of buckling of a thin elastic cylindrical shell, supported by rings of various stiffness. The approximate solution for clamping edge was obtained with analytical Rayleigh-Ritz method. The parameters of the optimal distribution of the mass of the structure between the shell and the stiffeners are found in order to maximize the critical pressure. Frames with zero eccentricity are considered. The obtained analytical solutions are compared with the solution by the finite element method.

New ultrastructural findings about Borrelia burgdorferi by cryofixation, negative staining, thin sectioning and scanning techniques

1990 ◽  
Vol 48 (3) ◽  
pp. 582-583
Author(s):  
S. F. Hayes ◽  
M. D. Corwin ◽  
T. G. Schwan ◽  
D. W. Dorward ◽  
W. Burgdorfer
Keyword(s):  
Lyme Disease ◽  
Borrelia Burgdorferi ◽  
Structural Characterization ◽  
Negative Staining ◽  
Low Speed ◽  
Thin Sectioning ◽  
Ultrastructural Findings

Characterization of Borrelia burgdorferi strains by means of negative staining EM has become an integral part of many studies related to the biology of the Lyme disease organism. However, relying solely upon negative staining to compare new isolates with prototype B31 or other borreliae is often unsatisfactory. To obtain more satisfactory results, we have relied upon a correlative approach encompassing a variety EM techniques, i.e., scanning for topographical features and cryotomy, negative staining and thin sectioning to provide a more complete structural characterization of B. burgdorferi.For characterization, isolates of B. burgdorferi were cultured in BSK II media from which they were removed by low speed centrifugation. The sedimented borrelia were carefully resuspended in stabilizing buffer so as to preserve their features for scanning and negative staining. Alternatively, others were prepared for conventional thin sectioning and for cryotomy using modified procedures. For thin sectioning, the fixative described by Ito, et al.

Reopening of Chronic Coronary Occlusions by Low-Speed Rotational Angioplasty

1994 ◽  
Vol 12 (4) ◽  
pp. 623-629 ◽  
Author(s):  
Andreas Hartmann ◽  
Martin Kaltenbach
Keyword(s):  
Low Speed
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