Sensitivity Assessment of the Nonlinear Resonant Ultrasonic Spectroscopy for Concrete Damage Detection

2020 ◽  
Vol 868 ◽  
pp. 51-56
Author(s):  
Michal Matysík ◽  
Iveta Plšková ◽  
Zdeněk Chobola
Keyword(s):  
Excitation Frequency ◽  
Acoustic Method ◽  
Ultrasonic Spectroscopy ◽  
Resonant Ultrasound Spectroscopy ◽  
Sensitivity Assessment ◽  
Concrete Damage ◽  
Hysteretic Nonlinearity ◽  
Resonant Ultrasound ◽  
Damage In Concrete ◽  
Destructive Methods

Nonlinear Resonant Ultrasound Spectroscopy is a nondestructive acoustic method which is able to measure the bulk hysteretic nonlinearity. This method monitors the shift of the resonant frequency in response of variations in the excitation frequency amplitudes. Measurements were performed on concrete samples exposed to temperatures of 200, 400, 600, 800, 1000, 1200 °C. The elastic modulus values are given to compare the Nonlinear Resonant Ultrasound Spectroscopy (NRUS) sensitivity. These are calculated from the measured velocities of ultrasonic pulses (linear acoustic method) and from the bulk density. The strengths of the samples obtained by destructive methods are also given. Based on these results, the NRUS method can be described as a very sensitive indicator of damage in concrete.

Resonant ultrasound spectroscopy of silicon carbide ceramics SiC‒AlN

2021 ◽  
pp. 136-140
Author(s):  
E. G. Pashuk ◽  
G. D Kardashova ◽  
Sh. A. Khalilov
Keyword(s):  
Silicon Carbide ◽  
Elastic Moduli ◽  
Ultrasonic Spectroscopy ◽  
Resonant Ultrasound Spectroscopy ◽  
Plasma Sintering ◽  
Spark Plasma ◽  
Complete Set ◽  
Resonant Ultrasound ◽  
Carbide Ceramics ◽  
Silicon Carbide Ceramics

The paper discusses the possibility of using resonant ultrasonic spectroscopy (RUS) as a source of information for the physics and technology of obtaining silicon carbide ceramics by the example of samples of the composition SiC ‒ 25 % AlN, obtained by the method of spark plasma sintering. The possibility of obtaining a complete set of elastic moduli (EM) of samples with an error of less than 1 % is shown. At the same time, the requirements for surface quality are significantly reduced. The revealed functional relationship between EM and porosity makes it possible to create a non-destructive method of porosity control and calculate the elastic moduli at zero porosity (i. e., the elastic modulus of the ceramic matrix EM0). Comparison of EM0 samples obtained at different parameters of the technological process allows determining their optima values..

Young’s moduli of sputter-deposited NiTi films determined by resonant ultrasound spectroscopy: Austenite, R-phase, and martensite

2015 ◽  
Vol 101 ◽  
pp. 24-27 ◽  
Author(s):  
Martina Thomasová ◽  
Petr Sedlák ◽  
Hanuš Seiner ◽  
Michaela Janovská ◽  
Meni Kabla ◽  
...  
Keyword(s):  
Resonant Ultrasound Spectroscopy ◽  
Young’S Moduli ◽  
Resonant Ultrasound ◽  
Sputter Deposited

Full tensorial characterization of PZN-12%PT single crystal by resonant ultrasound spectroscopy

2008 ◽  
Vol 55 (2) ◽  
pp. 476-488 ◽  
Author(s):  
T. Delaunay ◽  
E. Le Clezio ◽  
M. Guennou ◽  
H. Dammak ◽  
Mai Pham Thi ◽  
...  
Keyword(s):  
Single Crystal ◽  
Resonant Ultrasound Spectroscopy ◽  
Resonant Ultrasound
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