Relationship between Second- and Third-order Acoustic Nonlinear Parameters in Relative Measurement
http://www.sciencedirect.com/science/article/pii/S0041624X14002947
Relationship between second- and third-order acoustic nonlinear parameters in relative measurement
Highlights
- •
We proposed the simplified form of third-order acoustic nonlinear parameter.
- •
We newly derived the relationship between simplified forms of second- and third-order nonlinear parameter.
- •
We experimentally verified this new relationship.
Abstract
The higher-order acoustic nonlinear parameters are considered effective damage indices in the field of nondestructive evaluation (NDE). They are defined by using the displacement amplitudes of the fundamental frequency and the harmonics, which are called the absolute nonlinear parameters. Generally, however, it is difficult to measure the very small displacement amplitudes of high-frequency harmonics. Therefore, the simplified parameters using the detected wave signal amplitudes, which are known as the relative nonlinear parameters, have been widely used, although their applications are limited to the relative comparison of before and after damage of a single material under consistent experimental circumstances. In this paper, in order to make clear the concept of relative parameter, we presented first that the relative ratio of the simplified parameters is identical to that of the absolute parameters when the detected signal amplitudes are linearly proportional to the actual displacement amplitudes with respect to the fundamental frequency and the harmonics. In addition, the new relationship between the relative ratio of simplified second-order parameter and the relative ratio of simplified third-order parameter was derived from the relationship between the absolute second- and third-order parameters. This new relationship was successfully verified based on experimental results obtained from Al 6061-T6 processed for different heat treatment times, where it was confirmed in advance that the PZT detection signal amplitudes at the fundamental frequency and its second- and third-order harmonics were linearly proportional to the displacement amplitudes.
-
Fully Non-Contact Assessment of Acoustic Nonlinearity According to Plastic Deformation in Al6061 Alloy
Date2014.03.05 CategoryDomestic Views135370 -
"Acoustic Nonlinearity of Surface Wave in a Fatigued Aluminum Alloy Specimen "
Date2012.05.03 CategoryInternational Views135693 -
Relationship between Second- and Third-order Acoustic Nonlinear Parameters in Relative Measurement
Date2015.09.16 CategoryInternational Views138588 -
Crack Detection in Single-Crystalline Silicon Wafer Using Laser Generated Lamb Wave
Date2014.03.05 CategoryInternational Views139439 -
2013 글로벌박사펠로우십 신규 사업 2 건 최종 선정 (박사과정 김진수, 석박통합과정 서호건)
Date2013.06.19 CategoryAward Views139673 -
인듐안티모나이드(InSb) 소자를 이용한 적외선 방사온도 계측시스템의 개발 연구
Date2012.05.03 CategoryDomestic Views139797 -
Comparison of Ultrasonic Nonlinear Parameters Measured by PZT and LiNbO3 Transducers
Date2017.01.16 CategoryInternational Views140278 -
모드선택성을 강화한 비접촉식 유도초음파 기술
Date2012.05.03 CategoryDomestic Views143322 -
Single-mode guided wave technique using ring-arrayed laser beam for thin-tube inspection
Date2012.05.03 CategoryInternational Views144513 -
Demonstration of Disturbance Propagation and Amplification in Car-Following Situation for Enhancement of Vehicle Platoon System
Date2015.09.16 CategoryInternational Views147733 -
Fatigue-induced microdamage characterization of stainless steel 316L using innovative nonlinear acoustics
Date2012.06.21 CategoryInternational Views148367 -
Non-Contact Evaluation of Acoustic Nonlinearity of a Laser-Generated Surface Wave in a Plastically Deformed Aluminum Alloy
Date2015.09.16 CategoryInternational Views160156 -
Finite Difference Method Analysis of Ultrasonic Nonlinearity in Partially Degraded Material
Date2012.05.03 CategoryInternational Views160385 -
Experimental Comparison of Nonlinear Parameters Obtained from Absolute Measurement and Relative Measurement
Date2017.01.16 CategoryInternational Views168197 -
Non-contact Single-Mode Guided Wave Technique by the Combination of Wavelength-Matched Laser Generation and Angle-Matched Leak Wave Detection
Date2012.05.03 CategoryInternational Views183063 -
Surface characteristics of aluminum 6061-T6 subjected to Nd:YAG pulsed-laser irradiation
Date2012.06.21 CategoryInternational Views187694 -
Imaging of Harmonic Wave Generated by Contact Acoustic Nonlinearity in Obliquely Incident Ultrasonic Wave
Date2014.03.05 CategoryDomestic Views191717 -
Evaluation of Ultrasonic Nonlinear Characteristics in Heat-Treated Aluminum Alloy (Al-Mg-Si-Cu)
Date2014.03.05 CategoryInternational Views191759 -
Assessment of Thermal Degradation by Cumulative Variation of Ultrasonic Nonlinear Parameter
Date2017.01.16 CategoryInternational Views207903 -
Feasibility of MFC (Macro-Fiber Composite) Transducers for Guided Wave Technique
Date2014.09.29 CategoryDomestic Views222742 -
Non-contact Measurement of Elastic Modulus by using Laser Ultrasonic
Date2015.09.16 CategoryInternational Views232645 -
Real-time detection of surface cracks on silicon wafers during laser beam irradiation
Date2015.09.16 CategoryInternational Views249572 -
Influence of repetitive pulsed laser irradiation on the surface characteristics of an aluminum alloy in the melting regime
Date2015.09.16 CategoryInternational Views282516 -
Absolute Measurement and Relative Measurement of Ultrasonic Nonlinear Parameter
Date2017.01.16 CategoryInternational Views303120 -
Analysis of the influence of surface roughness on measurement of ultrasonic nonlinearity parameter using contact-type transducer
Date2021.08.25 CategoryInternational Views506534 -
Thermal damages on the surface of a silicon wafer induced by a near-infrared laser
Date2014.09.29 CategoryInternational Views638233