Thermal excitation as a mean for nondestructive evaluation of embedded piezoelectric transducers

2016 ◽  
Author(s):  
A. Eydam ◽  
G. Suchaneck ◽  
G. Gerlach
Keyword(s):  
Nondestructive Evaluation ◽  
Piezoelectric Transducers ◽  
Thermal Excitation

Nondestructive evaluation

AccessScience ◽  
2015 ◽  
Keyword(s):  
Nondestructive Evaluation

Effects of contact gap on nondestructive evaluation using magnetic measurement for ferromagnetic steel

2020 ◽  
Vol 64 (1-4) ◽  
pp. 969-975
Author(s):  
Hiroaki Kikuchi ◽  
Yuki Sato
Keyword(s):  
Magnetic Flux ◽  
Nondestructive Evaluation ◽  
Effective Permeability ◽  
Magnetic Circuit ◽  
Magnetic Measurement ◽  
Air Gap ◽  
Motive Force ◽  
Hysteresis Curve ◽  
Evaluation Technique ◽  
Ferromagnetic Steel

We investigated effects of contact gap on magnetic nondestructive evaluation technique using a magnetic single-yoke probe. Firstly, we evaluated hysteresis curves and impedance related to permeability of the material measured by a single-yoke probe, when an air gap length between the probe and specimens changes. The hysteresis curve gradually inclines to the axis of the magneto-motive force and magneto-motive force at which the magnetic flux is 0 decreases with increasing the gap length. The effective permeability also decreases with increasing the gap thickness. The incremental of gap thickness increases the reluctance inside the magnetic circuit composed of the yoke, specimen and gap, which results in the reduction of flux applying to specimen.

A Framework for Computational Nondestructive Evaluation of Degraded Composites with Microscale Discontinuities

2020 ◽  
Vol 78 (1) ◽  
pp. 104-118
Author(s):  
Sajan Shrestha ◽  
◽  
Vahid Tavaf ◽  
Sourav Banerjee
Keyword(s):  
Nondestructive Evaluation

Nondestructive Evaluation of Additively Manufactured Metal Components with an Eddy Current Technique

2018 ◽  
Author(s):  
Benjamin Schneider ◽  
◽  
Mohammad Rashid Bin Mohammad Shoaib ◽  
Hossein Taheri ◽  
Lucas Koester ◽  
...  
Keyword(s):  
Nondestructive Evaluation ◽  
Eddy Current ◽  
Current Technique

ABOUT HEAT CAPACITY OF TITANIUM CARBIDE TiCx

2019 ◽  
pp. 56-66
Author(s):  
I. Khidirov ◽  
V. V. Getmanskiy ◽  
A. S. Parpiev ◽  
Sh. A. Makhmudov
Keyword(s):  
Heat Capacity ◽  
High Temperature ◽  
Titanium Carbide ◽  
Temperature Dependence ◽  
Carbon Concentration ◽  
Room Temperature ◽  
Thermodynamic Characteristics ◽  
Liquid Nitrogen Temperature ◽  
Analysis Data ◽  
Thermal Excitation

This work relates to the field of thermophysical parameters of refractory interstitial alloys. The isochoric heat capacity of cubic titanium carbide TiCx has been calculated within the Debye approximation in the carbon concentration  range x = 0.70–0.97 at room temperature (300 K) and at liquid nitrogen temperature (80 K) through the Debye temperature established on the basis of neutron diffraction analysis data. It has been found out that at room temperature with decrease of carbon concentration the heat capacity significantly increases from 29.40 J/mol·K to 34.20 J/mol·K, and at T = 80 K – from 3.08 J/mol·K to 8.20 J/mol·K. The work analyzes the literature data and gives the results of the evaluation of the high-temperature dependence of the heat capacity СV of the cubic titanium carbide TiC0.97 based on the data of neutron structural analysis. It has been proposed to amend in the Neumann–Kopp formula to describe the high-temperature dependence of the titanium carbide heat capacity. After the amendment, the Neumann–Kopp formula describes the results of well-known experiments on the high-temperature dependence of the heat capacity of the titanium carbide TiCx. The proposed formula takes into account the degree of thermal excitation (a quantized number) that increases in steps with increasing temperature.The results allow us to predict the thermodynamic characteristics of titanium carbide in the temperature range of 300–3000 K and can be useful for materials scientists.

A new methodology for nondestructive evaluation and rating of bridges

2004 ◽  
Author(s):  
T.M. Whalen ◽  
J.F. Gauthier ◽  
J. Liu
Keyword(s):  
Nondestructive Evaluation

Measuring the reliability of nondestructive evaluation systems

1994 ◽  
Author(s):  
Charles Annis
Keyword(s):  
Nondestructive Evaluation ◽  
Evaluation Systems

VIBRATION CONTROL IN A CANTILEVER BEAM USING NEGATIVE CAPACITANCE SHUNT CIRCUIT WITH RESISTOR IN SERIES COUPLED TO PIEZOELECTRIC TRANSDUCERS

2019 ◽  
Author(s):  
Alan Gonçalves ◽  
José Marques Basílio Sobrinho ◽  
Renato Rangel ◽  
Cícero da Rocha Souto
Keyword(s):  
Vibration Control ◽  
Cantilever Beam ◽  
Piezoelectric Transducers ◽  
Negative Capacitance ◽  
In Series ◽  
Shunt Circuit
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