scholarly journals Energy trapping of circumferential resonant modes at a thin-walled groove in a hollow cylinder

2019 ◽  
Vol 146 (4) ◽  
pp. EL376-EL380
Author(s):  
Takahiro Hayashi
Keyword(s):  
Hollow Cylinder ◽  
Energy Trapping ◽  
Resonant Modes ◽  
Thin Walled

Instability of a Hollow Elastic Cylinder Under Tension, Torsion, and Inflation

2007 ◽  
Vol 75 (1) ◽  
Author(s):  
Leonid M. Zubov ◽  
Denis N. Sheidakov
Keyword(s):  
Hollow Cylinder ◽  
Stability Region ◽  
Three Dimensional ◽  
Elastic Stability ◽  
Elastic Cylinder ◽  
Elastic Instability ◽  
Incompressible Medium ◽  
Compressive Loads ◽  
Thin Walled ◽  
External Loads

Background. Many papers on the elastic stability of both thin-walled and massive (three-dimensional) bodies regard the bifurcation of equilibrium in the case of compressive loads. Although, the elastic instability may also occur under tensile stresses. Method of Approach. In the present paper on the basis of three-dimensional equations of the nonlinear elasticity the instability of a stretched infinite hollow cylinder under torsion and inflation is investigated. The bifurcational method of stability analysis is used. Results. The critical surfaces and stability region in the space of loading parameters are defined for a Biderman material and special model of incompressible medium, which possess essential material nonlinearity. The influence of a wall thickness on the instability of a hollow cylinder is analyzed. Conclusions. Based on the obtained results, a simple and efficient practical criterion of stability under tension is formulated. This criterion can be represented in the form of the Drucker postulate, given in terms of external loads.

scholarly journals Bulging initiation and propagation in fiber-reinforced swellable Mooney–Rivlin membranes

2021 ◽  
Vol 128 (1) ◽  
Author(s):  
Heiko Topol ◽  
Murtadha J. Al-Chlaihawi ◽  
Hasan Demirkoparan ◽  
José Merodio
Keyword(s):  
Mechanical Properties ◽  
Hollow Cylinder ◽  
Fiber Orientation ◽  
Hyperelastic Material ◽  
Ground Substance ◽  
Fiber Reinforced ◽  
Initiation And Propagation ◽  
Thin Walled

AbstractThis article considers a thin-walled hollow cylinder, which is composed of a fibrous and swellable hyperelastic material. The fibers are arranged in two families and they are taken to be parallel within each fiber family. The two fiber families are also assumed to be mechanically equivalent and symmetrically disposed in the ground substance material. At each instant of the homogeneous swelling, the material is taken to be incompressible. This article studies the interplay of swelling, fiber orientation, and the mechanical properties of the constituents on the initiation as well as on the axial propagation of bulging.

scholarly journals Facile Fabrication of Highly Perforated Hollow Metallic Cylinder with Changeable Micro-Orifices by Electroforming-Extrusion Molding Hybrid Process

Micromachines ◽  
2020 ◽  
Vol 11 (1) ◽  
pp. 70
Author(s):  
Junzhong Zhang ◽  
Pingmei Ming ◽  
Xinmin Zhang ◽  
Ge Qin ◽  
Liang Yan ◽  
...  
Keyword(s):  
Hollow Cylinder ◽  
Hybrid Process ◽  
Hybrid Technique ◽  
Polymer Extrusion ◽  
Promising Alternative ◽  
Moulding Process ◽  
Electroforming Process ◽  
Metallic Cylinder ◽  
Thin Walled ◽  
The Given

A seamless thin-walled hollow metallic cylinder with array of micro-perforations is one of the key components for some products. Normally, these micro-perforations are formed by removing material from the given metallic hollow cylinder (pipe or tube) one by one or row by row. To efficiently and flexibly manufacture such a highly perforated hollow cylinder, this paper proposed a hybrid technique combining extrusion moulding process and electroforming process. In the hybrid technique, the extrusion moulding process was used to create polymer extrusion patterns on the outside surface of the given stainless steel (SS) pipe, and then the electroforming process was carried out using the SS pipe as the mandrel. The formation of the polymer extrusion patterns was simulated and extruding molding experiments were carried out to examine the feasibility of the various mandrels. Electroforming experiments were implemented to verify the achievement of the seamless perforated thin-walled hollow cylinder. It was found that five different types of polymer extrusion pattern were able to be obtained on the same extruding pipe just by adjusting some extruding conditions and parameters, and correspondingly four types of perforated hollow cylinder with different tapered orifices are produced after the electroforming process. The obtainable perforations are: perforation with double conic-orifices, perforation with hemispheric orifice and conic orifice, unidirectionally tapered perforation, and straight-walled perforation. The geometric profile of the extrusion patterns is highly dependent on the processing conditions and parameters. The proposed hybrid process represents a promising alternative process to fabricate seamless thin-walled perforated hollow metallic cylinder efficiently, flexibly, and with low cost.

Reliability of thin-walled cylinder tests for elastic properties of anisotropic rocks

1996 ◽  
Vol 33 (6) ◽  
pp. 1008-1014 ◽  
Author(s):  
M L Talesnick
Keyword(s):  
Elastic Properties ◽  
Hollow Cylinder ◽  
Testing Procedure ◽  
Test Method ◽  
Material Parameters ◽  
Transverse Isotropic ◽  
Anisotropic Rocks ◽  
Hollow Cylinders ◽  
Thin Walled

Elastic properties of transverse isotropic rocks may be theoretically determined by subjecting a single hollow cylinder specimen to a set of two simple stress conditions. The reliability of the methodology is considered by testing both thin-walled hollow cylinders and thick-walled hollow cylinders. The results indicate that the testing procedure produces consistent material parameters, sample preparation does not seem to induce changes in the specimen behaviour, and that the assumptions implemented in the determination of the material parameters are reasonable. Key words: hollow cylinder, anisotropy, elasticity, test method.

Radial mass analysis of unstained STEM images of molluscan hemocyanins

1990 ◽  
Vol 48 (3) ◽  
pp. 810-811
Author(s):  
M.G. Hamilton ◽  
T.T. Herskovits ◽  
J.S. Wall
Keyword(s):  
Image Analysis ◽  
Hollow Cylinder ◽  
Electron Micrographs ◽  
Side View ◽  
Mass Analysis ◽  
Mass Measurements ◽  
Electron Microscopic ◽  
Transmission Electron ◽  
Transmission Electron Microscopic ◽  
Microscopic Studies

The hemocyanins of molluscs are aggregates of a cylindrical decameric subparticle that assembles into di-, tri-, tetra-, penta-, and larger multi-decameric particles with masses that are multiples of the 4.4 Md decamer. Electron micrographs of these hemocyanins typically show the particles with two profiles: circular representing the cylinder viewed from the end and rectangular representing the side-view of the hollow cylinder.The model proposed by Mellema and Klug from image analysis of a didecameric hemocyanin with the two decamers facing one another with collar (closed) ends outward fits the appearance of side-views of the negatively-stained cylinders. These authors also suggested that there might be caps at the ends. In one of a series of transmission electron microscopic studies of molluscan hemocyanins, Siezen and Van Bruggen supported the Mellema-Klug model, but stated that they had never observed a cap component. With STEM we have tested the end cap hypothesis by direct mass measurements across the end-views of unstained particles.

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