Resonant Ultrasound Spectroscopy: Sensitivity Analysis for Isotropic Materials and Anisotropic Materials With Cubic Symmetry

2018 ◽  
Vol 141 (2) ◽  
Author(s):  
Farhad Farzbod ◽  
Onome E. Scott-Emuakpor
Keyword(s):  
Sensitivity Analysis ◽  
Elastic Constants ◽  
Isotropic Material ◽  
Sample Material ◽  
Resonant Ultrasound Spectroscopy ◽  
Resonant Frequencies ◽  
Cubic Symmetry ◽  
Simple Geometry ◽  
Properties Of Materials ◽  
Resonant Ultrasound

Resonant ultrasound spectroscopy (RUS) is an experimental method to measure elastic and anelastic properties of materials. The RUS experiment is conducted by exciting a specimen with a simple geometry and measuring resonant frequencies. From the resonant behaviors, both elastic and anelastic properties of the sample material can be extracted. This paper investigates the sensitivities of measured resonant frequencies to changes in elastic constants for an isotropic material and anisotropic material with cubic symmetry. Also under investigation is whether different specimen geometries increase the sensitivity of RUS; in other words, a path for optimizing the reliability of RUS data is explored.

scholarly journals Resonant Ultrasound Spectroscopy: Sensitivity Analysis for Anisotropic Materials with Hexagonal Symmetry

2021 ◽  
pp. 1-20
Author(s):  
Christopher Sevigney ◽  
Onome Scott-Emuakpor ◽  
Farhad Farzbod
Keyword(s):  
Elastic Constants ◽  
Material Properties ◽  
Free Vibrations ◽  
Hexagonal Symmetry ◽  
Resonant Ultrasound Spectroscopy ◽  
Cubic Symmetry ◽  
Complete Set ◽  
Resonant Ultrasound ◽  
Non Destructive

Abstract Resonance ultrasound spectroscopy (RUS) is a non-destructive technique for evaluating elastic and an-elastic material properties. The frequencies of free vibrations for a carefully crafted sample are measured, and material properties can be extracted from this. In one popular application, the determination of monocrystal elasticity, the results are not always reliable. In some cases, the resonant frequencies are insensitive to changes in certain elastic constants or their linear combinations. Previous work has been done to characterize these sensitivity issues in materials with isotropic and cubic symmetry. This work examines the sensitivity of elastic constant measurements by the RUS method for materials with hexagonal symmetry, such as titanium-diboride. We investigate the reliability of RUS data and explore supplemental measurements to obtain an accurate and complete set of elastic constants.

scholarly journals Analysis of Resonant Ultrasound Spectroscopy as a technique to evaluate material property changes

2017 ◽  
Author(s):  
◽  
Gautham Manoharan
Keyword(s):  
Elastic Constant ◽  
Elastic Constants ◽  
Fem Simulation ◽  
Evaluation Tool ◽  
Resonant Ultrasound Spectroscopy ◽  
Resonant Frequencies ◽  
Resonant Ultrasound ◽  
Effects Of Radiation ◽  
Property Changes ◽  
The Right

The objective of this thesis is to validate Resonant Ultrasound Spectroscopy (RUS) as a non-destructive evaluation tool that can be used to study effects of radiation on the mechanical properties of a material, mainly its elastic constants. RUS involves experimentally measuring the resonant frequencies of a sample and calculating the elastic constants based on these measurements. Finite Element Method (FEM) is used to get the frequencies of the modes of free vibration for the sample model. This result depends on the elastic constant values used in the FEM simulation. Studies were conducted to confirm the accuracy of the FEM model, and determine the right configuration and parameters to use for the simulation. Assuming uniform and isotropic elastic property changes, the effects of radiation damage can be quantified by obtaining a set of matching resonant frequencies between the experimental and FEM simulation results, before and after irradiating the sample. This is done by adjusting the elastic constant values used in the simulation so that the results match with the experimentally obtained resonant frequencies. With powerful enough equipment, even real time monitoring is possible in harsh environments, thus pointing out imminent failure.

scholarly journals High Temperature Resonant Ultrasound Spectroscopy: A Review

2010 ◽  
Vol 2010 ◽  
pp. 1-13 ◽  
Author(s):  
G. Li ◽  
J. R. Gladden
Keyword(s):  
High Temperature ◽  
Elastic Constants ◽  
Resonance Spectrum ◽  
Condensed Matter ◽  
Amorphous Solid ◽  
Theoretical Background ◽  
Resonant Ultrasound Spectroscopy ◽  
Other Information ◽  
Resonant Ultrasound

The measurement of elastic constants plays an important role in condensed matter physics and materials characterization. This paper presents the resonant ultrasound spectroscopy (RUS) method for the determination of elastic constants in a single crystal or amorphous solid. In RUS, the measured resonance spectrum of a properly prepared sample and other information such as geometry, density, and initial estimated elastic constants are used to determine the elastic constants of the material. We briefly present the theoretical background and applications to specific materials; however, the focus of this review is on the technical applications of RUS, especially those for high-temperature measurements.

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