Acoustic waves generated by a laser line pulse in cylinders; Application to the elastic constants measurement

2004 ◽  
Vol 115 (4) ◽  
pp. 1537-1545 ◽  
Author(s):  
Y. Pan ◽  
C. Rossignol ◽  
B. Audoin
Keyword(s):  
Elastic Constants ◽  
Acoustic Waves ◽  
Laser Line

scholarly journals Elastic Constants of Diamond-Like Carbon Films by Surface Brillouin Scattering

1999 ◽  
Vol 593 ◽  
Author(s):  
A.C. Ferrari ◽  
J. Robertson ◽  
R. Pastorelli ◽  
M.G. Beghi ◽  
C.E. Bottani
Keyword(s):  
Thin Films ◽  
Amorphous Carbon ◽  
Elastic Constants ◽  
Acoustic Waves ◽  
Brillouin Scattering ◽  
Surface Acoustic Waves ◽  
Carbon Films ◽  
Diamond Like Carbon ◽  
Amorphous Carbon Films ◽  
Tetrahedral Amorphous Carbon

ABSTRACTThe elastic constants of thin Diamond-Like Carbon (DLC) films supply important information, but their measurement is difficult. Standard nanoindentation does not directly measure the elastic constants and has strong limitations particularly in the case of hard thin films on softer substrates, such as tetrahedral amorphous carbon on Si. Surface acoustic waves provide a better mean to investigate elastic properties. Surface Brillouin scattering (SBS) intrinsically probes acoustic waves of the wavelength which is appropriate to test the properties of films in the tens to hundreds of nanometers thickness range. SBS can be used to derive all the isotropic elastic constants of hard-on-soft and soft-on-hard amorphous carbon films of different kinds, with thickness down to less than 10 nm. The results help to resolve the previous uncertainties in mechanical data. The Young's modulus of tetrahedral amorphous carbon (ta-C) turns out to be lower than that of diamond, while the moduli of hydrogenated ta-C (ta-C:H) are considerably lower than those of ta-C because of the weakening effect of C-H bonding.

scholarly journals Evaluation of Effective Elastic Properties of Nitride NWs/Polymer Composite Materials Using Laser-Generated Surface Acoustic Waves

2018 ◽  
Vol 8 (11) ◽  
pp. 2319 ◽  
Author(s):  
Evgeny Glushkov ◽  
Natalia Glushkova ◽  
Bernard Bonello ◽  
Lu Lu ◽  
Eric Charron ◽  
...  
Keyword(s):  
Wave Propagation ◽  
Composite Materials ◽  
Elastic Constants ◽  
Acoustic Waves ◽  
Composite Structures ◽  
Elastic Moduli ◽  
Surface Acoustic Waves ◽  
Dispersion Curves ◽  
Effective Elastic Moduli ◽  
Asymptotic Representations

In this paper we demonstrate a high potential of transient grating method to study the behavior of surface acoustic waves in nanowires-based composite structures. The investigation of dispersion curves is done by adjusting the calculated dispersion curves to the experimental results. The wave propagation is simulated using the explicit integral and asymptotic representations for laser-generated surface acoustic waves in layered anisotropic waveguides. The analysis of the behavior permits to determine all elastic constants and effective elastic moduli of constituent materials, which is important both for technological applications of these materials and for basic scientific studies of their physical properties.

Temperature Dependence of the Elastic Constants of Gallium

1975 ◽  
Vol 53 (6) ◽  
pp. 581-582 ◽  
Author(s):  
T. J. Langill ◽  
J. Trivisonno
Keyword(s):  
Single Crystal ◽  
Temperature Dependence ◽  
Elastic Constants ◽  
High Purity ◽  
Acoustic Waves ◽  
Ultrasonic Pulse ◽  
Pulse Echo

A modified ultrasonic pulse overlap technique was employed to measure the single crystal elastic constants of high purity gallium from 4.2 K to 190 K. The results are compared with data obtained by a technique which employed direct electromagnetic generation of acoustic waves as well as with earlier pulse echo measurements.

Single crystal elastic constants evaluated with surface acoustic waves generated and detected by lasers within polycrystalline steel samples

2016 ◽  
Vol 119 (4) ◽  
pp. 043103 ◽  
Author(s):  
D. Gasteau ◽  
N. Chigarev ◽  
L. Ducousso-Ganjehi ◽  
V. E. Gusev ◽  
F. Jenson ◽  
...  
Keyword(s):  
Single Crystal ◽  
Elastic Constants ◽  
Acoustic Waves ◽  
Surface Acoustic Waves

Elastic constants of InxGa1-xAs and InxGa1-xP determined using surface acoustic waves

1999 ◽  
Vol 11 (28) ◽  
pp. L323-L327 ◽  
Author(s):  
A de Bernabé ◽  
C Prieto ◽  
L González ◽  
Y González ◽  
A G Every
Keyword(s):  
Elastic Constants ◽  
Acoustic Waves ◽  
Surface Acoustic Waves

Velocity of Sound and Acoustic Attenuation in Pure Gallium Single Crystals

1971 ◽  
Vol 49 (9) ◽  
pp. 1075-1097 ◽  
Author(s):  
K. R. Lyall ◽  
J. F. Cochran
Keyword(s):  
Single Crystals ◽  
Elastic Constants ◽  
Acoustic Waves ◽  
Sound Waves ◽  
Velocity Of Sound ◽  
Velocity Data ◽  
Acoustic Attenuation ◽  
Longitudinal Waves ◽  
Complete Set ◽  
Standing Sound

The velocity of sound for both transverse and longitudinal waves has been measured in single crystals of pure gallium. These velocity data have been used to calculate a complete set of elastic constants for gallium at 273, 77, and 4.2 °K. A survey has also been made of the acoustic attenuation in gallium at approximately 5 MHz over the range 1.5–300 °K. The measurements were made using a transducerless method which utilizes the direct electromagnetic generation of acoustic waves at the surfaces of a metal to excite standing sound waves in a slab-shaped specimen. It is demonstrated that this technique is both convenient and sensitive: changes of 1:106 in the velocity of sound in gallium were found to be readily measurable over the range 1.5–300 °K.

Sign in / Sign up

Export Citation Format

Share Document