scholarly journals On Macroscopic Behaviors of Shape Memory Alloy Thick-walled Cylinder Under Combined Internal Pressure and Radial Temperature Gradient

2013 ◽  
Vol 94 (3) ◽  
pp. 239-260 ◽  
Author(s):  
Bingfei Liu ◽  
Guansuo Dui ◽  
Lijun Xue ◽  
Benming Xie
Keyword(s):  
Temperature Gradient ◽  
Shape Memory Alloy ◽  
Internal Pressure ◽  
Shape Memory ◽  
Radial Temperature Gradient ◽  
Radial Temperature ◽  
Walled Cylinder

Analytical Solution for Pseudoelastic Response of a Shape Memory Alloy Thick-Walled Cylinder Under Internal Pressure

2012 ◽  
Author(s):  
Majid Tabesh ◽  
Bingfei Liu ◽  
James Boyd ◽  
Dimitris Lagoudas
Keyword(s):  
Shape Memory Alloy ◽  
Analytical Solution ◽  
Internal Pressure ◽  
Shape Memory ◽  
Analytical Solutions ◽  
Radial Displacement ◽  
Transformation Strain ◽  
Linear Hardening ◽  
Strain Transformation ◽  
Walled Cylinder

Analytical solutions are derived for the pseudoelastic response of a shape memory alloy (SMA) thick-walled cylinders subjected to internal pressure. A Tresca transformation criterion and linear hardening are used. Equations are given for the stress, total strain, transformation strain, and radial displacement.

The Effect of Modified Crucible Design and Seed Attachment on SiC Crystal Grown by PVT

2013 ◽  
Vol 740-742 ◽  
pp. 77-80
Author(s):  
Jung Young Jung ◽  
Sang Il Lee ◽  
Mi Seon Park ◽  
Doe Hyung Lee ◽  
Hee Tae Lee ◽  
...  
Keyword(s):  
Crystal Growth ◽  
Temperature Gradient ◽  
Single Crystals ◽  
Crystal Quality ◽  
Full Width ◽  
Half Maximum ◽  
Radial Temperature Gradient ◽  
Radial Temperature ◽  
Better Than

The present research was focused to investigate the effect of internal crucible design that influenced the 4H-SiC crystal growth onto a 6H-SiC seed by PVT method. The crucible design was modified to produce a uniform radial temperature gradient in the growth cell. The seed attachment was also modified with a use of polycrystalline SiC plate. The crystal quality of 4H-SiC single crystals grown in modified crucible and grown with modified seed attachment was revealed to be better than that of crystal grown in conventional crucible. The full width at half maximum (FWHM) values of grown SiC crystals in the conventional crucible, the modified seed attachment and the modified crucible were 285 arcsec, 134 arcsec and 128 arcsec, respectively. The micropipe density (MPD) of grown SiC crystals in the conventional crucible, the modified seed attachment and the modified crucible were 101ea/cm^2, 81ea/cm^2 and 42ea/cm^2, respectively.

Study on the transient temperature distribution of new conical friction plate under sliding friction

2021 ◽  
pp. 095440702110696
Author(s):  
Yanzhong Wang ◽  
Peng Liu
Keyword(s):  
Temperature Distribution ◽  
Temperature Gradient ◽  
Temperature Rise ◽  
Friction Surface ◽  
Sliding Friction ◽  
Conical Surface ◽  
Transient Temperature ◽  
Radial Temperature Gradient ◽  
Radial Temperature ◽  
Friction Plate

Conical friction surface is a novel configuration for friction plate in transmission. Numerical FEA models for transient heat transfer and distribution of conically grooved friction plate have been established to investigate the thermal behavior of the conical surface with different configurations. The finite element method is used to obtain the numerical solution, the temperature test data of conical surface are obtained by the friction test rig. In order to study and compare the temperature behavior of conically grooved friction plate, several three-dimensional transient temperature models are established. The heat generated on the friction interface during the continuous sliding process is calculated. Two different pressure conditions were defined to evaluate the influence of different load conditions on temperature rise and the effects of conical configuration parameters on surface temperature distribution are investigated. The results show that the radial temperature gradient on conical friction surface is obvious. The uniform pressure condition could be used when evaluating the temperature rise of conically grooved friction plate. The increase of the cone height could improve the radial temperature gradient of the conically grooved friction plate.

scholarly journals Shape memory alloy engine for high efficiency low-temperature gradient thermal to electrical conversion

2019 ◽  
Vol 251 ◽  
pp. 113277 ◽  
Author(s):  
Prashant Kumar ◽  
Ravi Anant Kishore ◽  
Deepam Maurya ◽  
Colin J. Stewart ◽  
Reza Mirzaeifar ◽  
...  
Keyword(s):  
Low Temperature ◽  
Temperature Gradient ◽  
Shape Memory Alloy ◽  
Shape Memory ◽  
High Efficiency
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