scholarly journals Acousto-ultrasonic analysis of defects in composite specimens used in transportation domain

2021 ◽  
Vol 9 (2) ◽  
pp. 117-127
Author(s):  
Vassilios Kappatos ◽  
Evangelos D. Spyrou ◽  
Theocharis Tsenis
Keyword(s):  
Ultrasonic Analysis

Investigation of zirconium nanowire by elastic, thermal and ultrasonic analysis

2020 ◽  
Vol 75 (12) ◽  
pp. 1077-1084
Author(s):  
Bhawan Jyoti ◽  
Shakti Pratap Singh ◽  
Mohit Gupta ◽  
Sudhanshu Tripathi ◽  
Devraj Singh ◽  
...  
Keyword(s):  
Ultrasonic Attenuation ◽  
Thermal Relaxation ◽  
Coupling Constants ◽  
Physical Parameters ◽  
Third Order ◽  
Jones Potential ◽  
Acoustic Coupling ◽  
Anisotropic Factor ◽  
Third Order Elastic Constants ◽  
Ultrasonic Analysis

AbstractThe elastic, thermal and ultrasonic properties of zirconium nanowire (Zr-NW) have been investigated at room temperature. The second and third order elastic constants (SOECs and TOECs) of Zr-NW have been figured out using the Lennard–Jones Potential model. SOECs have been used to find out the Young’s modulus, bulk modulus, shear modulus, Poisson’s ratio, Pugh’s ratio, Zener anisotropic factor and ultrasonic velocities. Further these associated parameters of Zr-NW have been utilized for the evaluation of the Grüneisen parameters, thermal conductivity, thermal relaxation time, acoustic coupling constants and ultrasonic attenuation. On the basis of the above analyzed properties of Zr-NW, some characteristics features of the chosen nanowire connected with ultrasonic and thermo-physical parameters have been discussed.

Ultrasonic analysis in the ternary system of pyridine+benzene+2-butanol

2008 ◽  
Vol 403 (21-22) ◽  
pp. 3887-3891 ◽  
Author(s):  
Palaniappan Lakshmanan
Keyword(s):  
Ternary System ◽  
Ultrasonic Analysis

Fatigue Damage Monitoring of CFRP Elements by Thermographic Procedure under Bending Loads

2021 ◽  
Vol 873 ◽  
pp. 47-52
Author(s):  
Alessandra Pirinu ◽  
Francesco Panella
Keyword(s):  
Tensile Tests ◽  
Static Tests ◽  
Damage Initiation ◽  
Composite Damage ◽  
Damage Monitoring ◽  
Bending Loads ◽  
Ultrasonic Analysis ◽  
Local Compliance ◽  
Mechanical Tensile ◽  
Non Destructive

For structural health of mechanical structures, non-destructive detection and material defect characterization represent the main useful tools for mechanical decay prediction caused by local composite damage phenomena. In this work, internal delamination due to alternate bending were characterized in flat specimens, performing fatigue and static tests, coupled with thermographic, optical, and ultrasonic analysis for damage detection and evolution purposes. Damage to rupture behavior of CFRP material through mechanical tensile tests is performed on several samples and non-destructive inspection procedures are optimized during successive HCF tests to detect in real time local compliance variations and damage initiation. Thermographic continuous monitoring and occasional ultrasonic analysis are implemented to analyze composite anomalies during fatigue life and to elaborate a procedure for identification of delamination induced damage before failure. IRT and UT results are computed with MATLAB analysis for damage evaluation with strain and compliance data acquired during tests.

scholarly journals Ultrasonic Analysis of Peptide- and Antibody-Targeted Microbubble Contrast Agents for Molecular Imaging of α v β 3 -Expressing Cells

2004 ◽  
Vol 3 (2) ◽  
pp. 153535002004031
Author(s):  
Paul A. Dayton ◽  
David Pearson ◽  
Jarrod Clark ◽  
Scott Simon ◽  
Patricia A. Schumann ◽  
...  
Keyword(s):  
Molecular Imaging ◽  
Contrast Agents ◽  
Microbubble Contrast Agents ◽  
Ultrasonic Analysis

Image and ultrasonic analysis-based investigation of coal core fracturing by microwave energy

2020 ◽  
Vol 127 ◽  
pp. 104232 ◽  
Author(s):  
Yi-du Hong ◽  
Bai-quan Lin ◽  
Chuan-jie Zhu ◽  
Zheng Wang ◽  
Jin-quan Liu ◽  
...  
Keyword(s):  
Microwave Energy ◽  
Coal Core ◽  
Ultrasonic Analysis
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