Three-dimensional pyroelectric analysis of a multilayered piezoelectric hollow sphere with imperfect bonding

2014 ◽  
Vol 113 ◽  
pp. 145-154 ◽  
Author(s):  
Chengbin Liu ◽  
Zuguang Bian ◽  
Weiqiu Chen ◽  
Chaofeng Lü
Keyword(s):  
Hollow Sphere ◽  
Three Dimensional ◽  
Imperfect Bonding ◽  
Piezoelectric Hollow Sphere

scholarly journals Three Dimensional Characterization of a Silica Hollow Sphere with an Iron Oxide Core by Annular Dark Field Scanning Confocal Electron Microscopy

2010 ◽  
Vol 16 (S2) ◽  
pp. 1836-1837
Author(s):  
M Takeguchi ◽  
M Okuda ◽  
A Hashimoto ◽  
K Mitsuishi ◽  
M Shimojo ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Iron Oxide ◽  
Hollow Sphere ◽  
Three Dimensional ◽  
Dark Field ◽  
Annular Dark Field ◽  
Iron Oxide Core

Extended abstract of a paper presented at Microscopy and Microanalysis 2010 in Portland, Oregon, USA, August 1 – August 5, 2010.

Hollow Sphere Formation from a Three-Dimensional Structure Composed of an Adamantane-Based Cage

2014 ◽  
Vol 79 (14) ◽  
pp. 6738-6742 ◽  
Author(s):  
Masahide Tominaga ◽  
Kazuaki Ohara ◽  
Kentaro Yamaguchi ◽  
Isao Azumaya
Keyword(s):  
Hollow Sphere ◽  
Three Dimensional ◽  
Dimensional Structure ◽  
Three Dimensional Structure ◽  
Sphere Formation

scholarly journals Investigations of hollow sphere structures produced by selective laser sintering

Mechanik ◽  
2019 ◽  
Vol 92 (7) ◽  
pp. 439-441
Author(s):  
Kamil Cieplak ◽  
Tomasz Majewski
Keyword(s):  
Hollow Sphere ◽  
Computer Aided Design ◽  
Mechanical Energy ◽  
Selective Laser Sintering ◽  
Three Dimensional ◽  
Experimental Tests ◽  
Laser Sintering ◽  
Optimal Method ◽  
Sintering Additive ◽  
Three Dimensional Models

The research of hollow sphere structures as absorbers of mechanical energy is described. The first part of the article is devoted to the description of selective laser sintering additive technique as the optimal method of sample production in the case of laboratory tests. The next part presents the use of computer aided design to create parametric three-dimensional models. Next, the results of experimental tests in the conditions of quasi-static load are presented. Based on the collected data, a qualitative analysis of the structure deformation process was performed and final conclusions are presented.

scholarly journals Three-dimensional vibrations of multilayered hollow spheres submerged in a complex fluid

2019 ◽  
Vol 879 ◽  
pp. 682-715
Author(s):  
B. Wu ◽  
Y. Gan ◽  
E. Carrera ◽  
W. Q. Chen
Keyword(s):  
Hollow Sphere ◽  
Fluid Structure Interaction ◽  
Three Dimensional ◽  
The State ◽  
Relaxation Processes ◽  
Fluid Viscosity ◽  
Torsional Mode ◽  
Fluid Medium ◽  
Fluid Structure ◽  
Structure Interaction

Fluid–structure interaction is fundamental to the characteristics of the induced flows due to the motion of structures in fluids and also is crucial to the performance of submerged structures. This paper presents a three-dimensional analytical study of the intrinsic free vibration of an elastic multilayered hollow sphere interacting with an exterior non-Newtonian fluid medium. The fluid is assumed to be characterized by a compressible linear viscoelastic model accounting for both the shear and compressional relaxation processes. For small-amplitude vibrations, the equations governing the viscoelastic fluid can be linearized, which are then solved by introducing appropriate potential functions. The solid is assumed to exhibit a particular material anisotropy, i.e. spherical isotropy, which includes material isotropy as a special case. The equations governing the anisotropic solid are solved in spherical coordinates using the state-space formalism, which finally establishes two separate transfer relations correlating the state vectors at the innermost surface with those at the outermost surface of the multilayered hollow sphere. By imposing the continuity conditions at the fluid–solid interface, two separate analytical characteristic equations are derived, which characterize two independent classes of vibration. Numerical examples are finally conducted to validate the theoretical derivation as well as to investigate the effects of various factors, including fluid viscosity and compressibility, fluid viscoelasticity, solid anisotropy and surface effect, as well as solid intrinsic damping, on the vibration characteristics of the submerged hollow sphere. Particularly, our theoretically predicted vibration frequencies and quality factors of gold nanospheres with intrinsic damping immersed in water agree exceptionally well with the available experimentally measured results. The reported analytical solution is truly and fully three-dimensional, covering from the purely radial breathing mode to the torsional mode to any general spheroidal mode as well as being applicable to various simpler situations, and hence can be a broad-spectrum benchmark in the study of fluid–structure interaction.

Three-Dimensional Axisymmetric Elastic Stresses in Intersections of Hollow Sphere and Cylinders (Torsion, Tension and Internal Pressure)

1989 ◽  
Vol 111 (3) ◽  
pp. 218-224
Author(s):  
M. Kishida ◽  
K. Sasaki ◽  
M. Kawano
Keyword(s):  
Internal Pressure ◽  
Hollow Sphere ◽  
Integral Method ◽  
Three Dimensional ◽  
Boundary Integral ◽  
Diameter Ratio ◽  
Boundary Integral Method ◽  
Elastic Stresses ◽  
Photoelastic Experiment ◽  
The Mean

The three-dimensional axisymmetric elastic stresses in the intersections of hollow sphere and cylinders, subjected to torsion, tension and internal pressure, is analyzed easily and accurately by use of the indirect fictitious-boundary integral method. As a result, the influence of configuration parameters (e.g., the mean diameter ratio and the thickness ratio of hollow sphere and cylinder, and the roundness of a corner of intersection) on stress concentration is made clear. Furthermore, the other results, such as one obtained by photoelastic experiment, are evaluated by the present results.

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