scholarly journals Dynamic Thermal Stresses in Composite Hollow Cylinders and Spheres Caused by Sudden Heating

1992 ◽  
Vol 35 (3) ◽  
pp. 259-264
Author(s):  
Naobumi SUMI ◽  
Yoshimoto ITO
Keyword(s):  
Thermal Stresses ◽  
Hollow Cylinders ◽  
Cylinders And Spheres

High Density Bulk Shape Rapid Consolidation of the Yba2Cu307-X Superconductor

1989 ◽  
Vol 169 ◽  
Author(s):  
S. V. Rele ◽  
R. V. Raman ◽  
H. S. Meeks ◽  
R. L. Anderson ◽  
R. N. Shelton ◽  
...  
Keyword(s):  
Volume Fraction ◽  
X Ray Diffraction ◽  
X Ray ◽  
Superconducting Volume Fraction ◽  
One Step ◽  
Hollow Cylinders ◽  
Diffraction Patterns ◽  
Set Up ◽  
Cylinders And Spheres ◽  
High Processing

AbstractA novel rapid densification technique for fabrication of bulk shape YBa2Cu307–xsuperconductor is presented. The Ceracon process is a one‐step, quasi‐isostatic consolidation route utilizing conventional P/M equipment and set‐up. The Ceracon technology has enabled successful fabrication of bulk, shapes such as discs, cylinders, hollow cylinders and spheres along with significant increases in the density up to 95‐98% of the theorertical. The superconducting volume fraction is preserved due to short hold times at the operating temperatures and avoidance of high processing temperatures. Results based on densities, microstructure, susceptibility measurements, X‐ray diffraction patterns and TGA measurements are discussed.

Temperature fields and thermal stresses produced by unsteady induction heating of hollow cylinders

1973 ◽  
Vol 6 (2) ◽  
pp. 259-261
Author(s):  
Ya. S. Podstrigach ◽  
Z. I. Goryacheva ◽  
B. I. Kolodii ◽  
G. V. Plyatsko ◽  
A. N. Komarov
Keyword(s):  
Induction Heating ◽  
Thermal Stresses ◽  
Temperature Fields ◽  
Hollow Cylinders

Probabilistic Design Criteria for Cylinders and Spheres Under Thermal Stresses

1984 ◽  
Vol 106 (4) ◽  
pp. 523-528 ◽  
Author(s):  
C. O. Smith
Keyword(s):  
Heat Flux ◽  
Thermal Gradient ◽  
Vessel Wall ◽  
Factor Of Safety ◽  
Thermal Stresses ◽  
Probability Of Failure ◽  
Design Criteria ◽  
Probabilistic Design ◽  
Design Variables ◽  
Cylinders And Spheres

Cylinders and spheres are often used to contain hot or cold fluids. A temperature gradient across the vessel wall results in thermal stresses. This paper presents equations for means and standard deviations of thermal stresses developed in cylinders and spheres. Inherent in these equations are the facts that: (a) design variables are generally characterized by spectra of values, and (b) a small, but finite probability of failure must be recognized in any design. By coupling the stresses due to a thermal gradient as calculated by the equations in the paper with the strength available in a material, reliability (or the alternative probability of failure) can be calculated. Conversely, for a specified reliability the appropriate size or heat flux can be determined. Appropriate illustrations of application of these equations are provided by tables and figures. The difficulty of relying on a factor of safety is demonstrated.

Thermal Stresses in Anisotropic Hollow Cylinders

1965 ◽  
Vol 87 (2) ◽  
pp. 391-397 ◽  
Author(s):  
Tu-Lung Weng
Keyword(s):  
Isotropic Material ◽  
Critical Stress ◽  
Thermal Stresses ◽  
Transversely Isotropic ◽  
Transversely Isotropic Material ◽  
Gas Temperature ◽  
Numerical Examples ◽  
Temperature Boundary ◽  
Degree Of Anisotropy ◽  
Hollow Cylinders

The equations of thermal stresses and displacements in anisotropic hollow cylinders subjected to various selected temperature boundary conditions have been derived. The hollow cylinder is assumed to be made of transversely isotropic material. Several numerical examples are treated and the effects of the degree of anisotropy on the magnitudes of the critical stress and maximum permissible gas temperature for various sizes of grades ATJ and ZTA graphite hollow cylinders are examined. The errors which could result from the assumption of isotropic material are calculated.

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