skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Modeling of Resonant Ultrasound Spectroscopy Based Nondestructive Evaluation Using the "XYZ-Algorithm"

Abstract

Resonant ultrasound spectroscopy (RUS) is employed as a nondestructive evaluation (NDE) tool in a number of metal/ceramic forming industries [1]. The presence of volumetric defects in an otherwise flaw-free object affects the resonance characteristics of the object. The changes in resonance behavior depend on the number, locations, volume, and material properties of the defects. Since the normal modes of an object depend on its geometry and the position-dependent material properties, namely the density and the complex elastic stiffness tensor, by accurate measurement of a specimen’s resonance frequencies and amplitudes, one can detect and characterize flaws embedded within it. A correct forward mathematical model to predict resonance characteristics is vital to the required analyses. In this paper, we present several computational results depicting the influence of the presence of embedded flaws/defects in a test specimen having simple geometrical shape. The mathematical model is based on the computationally efficient “XYZ Algorithm” of Visscher et al.

Authors:
;
Publication Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
961686
Report Number(s):
PNNL-SA-54673
TRN: US200923%%164
DOE Contract Number:
AC05-76RL01830
Resource Type:
Conference
Resource Relation:
Conference: Proceedings of the International Congress on Ultrasonics, Paper No. 1322
Country of Publication:
United States
Language:
English
Subject:
47 OTHER INSTRUMENTATION; ULTRASONIC WAVES; SPECTROSCOPY; RESONANCE; DEFECTS; DETECTION; MATHEMATICAL MODELS; ALGORITHMS; Resonant Ultrasound Spectroscopy; Nondestructive Evaluation; Elastic Stiffness; Volumetric Flaws

Citation Formats

Ahmed, Salahuddin, and Bond, Leonard J. Modeling of Resonant Ultrasound Spectroscopy Based Nondestructive Evaluation Using the "XYZ-Algorithm". United States: N. p., 2007. Web. doi:10.3728/ICUltrasonics.2007.Vienna.1322_ahmed.
Ahmed, Salahuddin, & Bond, Leonard J. Modeling of Resonant Ultrasound Spectroscopy Based Nondestructive Evaluation Using the "XYZ-Algorithm". United States. doi:10.3728/ICUltrasonics.2007.Vienna.1322_ahmed.
Ahmed, Salahuddin, and Bond, Leonard J. Thu . "Modeling of Resonant Ultrasound Spectroscopy Based Nondestructive Evaluation Using the "XYZ-Algorithm"". United States. doi:10.3728/ICUltrasonics.2007.Vienna.1322_ahmed.
@article{osti_961686,
title = {Modeling of Resonant Ultrasound Spectroscopy Based Nondestructive Evaluation Using the "XYZ-Algorithm"},
author = {Ahmed, Salahuddin and Bond, Leonard J.},
abstractNote = {Resonant ultrasound spectroscopy (RUS) is employed as a nondestructive evaluation (NDE) tool in a number of metal/ceramic forming industries [1]. The presence of volumetric defects in an otherwise flaw-free object affects the resonance characteristics of the object. The changes in resonance behavior depend on the number, locations, volume, and material properties of the defects. Since the normal modes of an object depend on its geometry and the position-dependent material properties, namely the density and the complex elastic stiffness tensor, by accurate measurement of a specimen’s resonance frequencies and amplitudes, one can detect and characterize flaws embedded within it. A correct forward mathematical model to predict resonance characteristics is vital to the required analyses. In this paper, we present several computational results depicting the influence of the presence of embedded flaws/defects in a test specimen having simple geometrical shape. The mathematical model is based on the computationally efficient “XYZ Algorithm” of Visscher et al.},
doi = {10.3728/ICUltrasonics.2007.Vienna.1322_ahmed},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Thu May 03 00:00:00 EDT 2007},
month = {Thu May 03 00:00:00 EDT 2007}
}

Conference:
Other availability
Please see Document Availability for additional information on obtaining the full-text document. Library patrons may search WorldCat to identify libraries that hold this conference proceeding.

Save / Share:
  • Los Alamos National Laboratory is engaged in producing mixed actinide (i.e., U, Np, Pu, and Am) oxides to study candidates for nuclear fuels. Correlation of composition and processing technique with initial morphology and crystallographic structure is critical to understanding and predicting the performance of these fuels. In this presentation, I will communicate the results of characterization of fuels ranging in actinide composition from UO{sub 2}, U{sub 0.8}Pu{sub 0.2} to U{sub 0.75}Np{sub 0.02}Pu{sub 0.2}Am{sub 0.03} via Resonant Ultrasound Spectroscopy (RUS) for recently fabricated fuel candidates.
  • Thermal shock damage was generated by a water quench technique in 2-D woven-Nicalon{trademark} fiber chemical vapor infiltrated (CVI) SiC composite bars. In this study, resonant ultrasound spectroscopy (RUS) was used as a nondestructive evaluation (NDE) technique to quantify such damage. RUS spectra were measured for each specimen before and after quenching. The results show a clear correlation between the quench temperature difference ({Delta}T) and changes in the RUS spectra. Both the resonant frequencies and the resonance quality factor decreased with increasing magnitude of {Delta}T, thus, providing quantitative measures for the degree of thermal shock damage.
  • Mechanical properties of plasma sprayed ceramic coatings are extremely important to engine design. However, the determination of these properties is often difficult because of the unique and complicated microstructure of the coatings. In this presentation the determination of the elastic constants of plasma sprayed Yttria stabilized Zirconia thermal barrier coatings using resonant ultrasound spectroscopy will be described along with an analysis that enables the determination of the elastic constants as a function of temperature and coating direction. In this work, results on the following issues will be discussed: 1) the elastic anisotropy of thermal barrier coatings, which is associated withmore » coating failure modes; 2) sintering effects on coating compliance comparing with thermal behavior, which is important to coating performance on engineering structures, such as turbine engines; 3) coating elastic modulus at high temperatures close to the service condition, which provides insights of coating mechanical behavior in both fundamental and practical studies.« less
  • Elastic tensors for organic molecular crystals vary significantly among different measurements. To understand better the origin of these differences, Brillouin scattering and resonant ultrasound spectroscopy measurements were made on the same specimen for single crystal pentaerythritol tetranitrate. The results differ significantly despite mitigation of sample-dependent contributions to errors. The frequency dependence and vibrational modes probed for both measurements are discussed in relation to the observed tensor variance.