201 Analysis of One-dimensional Dynamic Thermoelastic Problem of Functionally Graded Thin Films

2013 ◽  
Vol 2013.51 (0) ◽  
pp. _201-1_-_201-2_
Author(s):  
Hiroaki NISHIDA ◽  
Fumihiro ASHIDA ◽  
Sei-ichiro SAKATA ◽  
Takuya MORIMOTO
Keyword(s):  
Thin Films ◽  
Functionally Graded ◽  
Thermoelastic Problem ◽  
One Dimensional

Axial guided wave characteristics in functionally graded one-dimensional hexagonal piezoelectric quasi-crystal cylinders

2021 ◽  
pp. 108128652110134
Author(s):  
B. Zhang ◽  
X.H. Wang ◽  
L. Elmaimouni ◽  
J.G. Yu ◽  
X.M. Zhang
Keyword(s):  
Coupling Effect ◽  
Energy Conversion Efficiency ◽  
Guided Wave ◽  
Functionally Graded ◽  
Phonon Modes ◽  
One Dimensional ◽  
Longitudinal Modes ◽  
Wave Characteristics ◽  
Piezoelectric Effects ◽  
Hollow Cylinders

In one-dimensional hexagonal piezoelectric quasi-crystals, there exist the phonon–phason, electro–phonon, and electro–phason couplings. Therefore, the phonon–phason coupling and piezoelectric effects on axial guided wave characteristics in one-dimensional hexagonal functionally graded piezoelectric quasi-crystal (FGPQC) cylinders are investigated by utilizing the Legendre polynomial series method. The dispersion curves and cut-off frequencies are illustrated. Wave characteristics in three hollow cylinders with different quasi-periodic directions are comparatively studied. Some new wave phenomena are revealed: the phonon–phason coupling and piezoelectric effects on the longitudinal and torsional phonon modes ( N = 0) vary as the quasi-periodic direction changes; the phonon–phason coupling effect on flexural–torsional modes in the r-, z-FGPQC hollow cylinders, and on flexural–longitudinal modes in ϑ-FGPQC hollow cylinders increases as N increases. The corresponding results obtained in this work lay the theoretical foundation for the design and manufacture of piezoelectric transducers with high resolution and energy-conversion efficiency.

Cathodic Arc Evaporation of Functionally Graded Chromium Nitride Thin Films for Wear Resistant and Forming Applications

1999 ◽  
Vol 308-311 ◽  
pp. 283-289 ◽  
Author(s):  
A.M. Peters ◽  
John J. Moore ◽  
Ivar Reimanis ◽  
Brajendra Mishra ◽  
Roland Weiss
Keyword(s):  
Thin Films ◽  
Functionally Graded ◽  
Chromium Nitride ◽  
Wear Resistant ◽  
Cathodic Arc Evaporation ◽  
Arc Evaporation ◽  
Cathodic Arc

The Elastic-Viscoelastic Correspondence Principle for Functionally Graded Materials, Revisited

2003 ◽  
Vol 70 (3) ◽  
pp. 359-363 ◽  
Author(s):  
S. Mukherjee ◽  
Glaucio H. Paulino
Keyword(s):  
Functionally Graded Materials ◽  
Functionally Graded Material ◽  
Correspondence Principle ◽  
Functionally Graded ◽  
Graded Materials ◽  
One Dimensional ◽  
Space And Time ◽  
Graded Material ◽  
Nonhomogeneous Materials ◽  
Exponentially Graded

Paulino and Jin [Paulino, G. H., and Jin, Z.-H., 2001, “Correspondence Principle in Viscoelastic Functionally Graded Materials,” ASME J. Appl. Mech., 68, pp. 129–132], have recently shown that the viscoelastic correspondence principle remains valid for a linearly isotropic viscoelastic functionally graded material with separable relaxation (or creep) functions in space and time. This paper revisits this issue by addressing some subtle points regarding this result and examines the reasons behind the success or failure of the correspondence principle for viscoelastic functionally graded materials. For the inseparable class of nonhomogeneous materials, the correspondence principle fails because of an inconsistency between the replacements of the moduli and of their derivatives. A simple but informative one-dimensional example, involving an exponentially graded material, is used to further clarify these reasons.

scholarly journals Characterization of Sputtered Shape Memory Alloy Ni-Ti Films by Cross-sectional TEM and SEM

2008 ◽  
Vol 14 (S3) ◽  
pp. 85-86
Author(s):  
R.M.S. Martins ◽  
A. Mücklich ◽  
N. Schell ◽  
R.J.C. Silva ◽  
K.K. Mahesh ◽  
...  
Keyword(s):  
Thin Films ◽  
Shape Memory ◽  
Smart Materials ◽  
Functionally Graded ◽  
Sensors And Actuators ◽  
Successful Development ◽  
Cross Sectional ◽  
Mechanical Devices ◽  
Ti Films

Ni-Ti Shape Memory Alloys (SMAs) have been attracting attention as smart materials because they can work as sensors and actuators at the same time. Miniaturization of mechanical devices is evolving toward sub-micron dimensions raising important questions in the properties of Ni-Ti films. In thin films it is essential to investigate the microstructure to understand the origin of the thickness limit. The design of functionally graded films has also been considered but for their successful development it is important to characterize the variations in crystalline structure.

<tex>$J_c$</tex>Enhancement in<tex>$rm YBa_2rm Cu_3rm O_rm x$</tex>Thin Films by Introduction of One-Dimensional Artificial Pinning Centers

2005 ◽  
Vol 15 (2) ◽  
pp. 3774-3777 ◽  
Author(s):  
K. Matsumoto ◽  
T. Horide ◽  
P. Mele ◽  
A. Ichinose ◽  
S. Horii ◽  
...  
Keyword(s):  
Thin Films ◽  
Pinning Centers ◽  
One Dimensional ◽  
Artificial Pinning Centers

scholarly journals Effect of spray conditions on formation of one-dimensional fluorine-doped tin oxide thin films

2016 ◽  
Author(s):  
Ajith Bandara ◽  
R. M. G. Rajapakse ◽  
Masayuki Okuya ◽  
Masaru Shimomura ◽  
Kenji Murakami
Keyword(s):  
Thin Films ◽  
Tin Oxide ◽  
Oxide Thin Films ◽  
One Dimensional
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