댓글 0조회 수 93904추천 수 0
?

단축키

이전 문서

다음 문서

+ - Up Down Comment Print
?

단축키

이전 문서

다음 문서

+ - Up Down Comment Print

http://link.springer.com/article/10.1007/s12541-015-0118-x

 

Non-contact measurement of elastic modulus by using laser ultrasound

  • Jongbeom Kim
  • , Kyoung-Young Jhang 

Abstract

Non-contact measurement of elastic modulus is necessary for the in-line assessment of material in harsh environments such as high temperature. In this paper, a fully non-contact method to measure elastic modulus is proposed based on the laser ultrasonic technique (LUT) that uses a short-pulsed laser to generate ultrasound and the other laser coupled to an interferometer using a photorefractive crystal to detect the ultrasonic wave displacement. Basically, this method measures velocities of shear wave and longitudinal wave to obtain the elastic modulus. The uniqueness is that the velocity of shear wave is measured in the thermo-elastic regime first and then the velocity of longitudinal wave is measured in the ablation regime. This is because the strong mode of generated ultrasound is the shear wave in the thermo-elastic regime while the longitudinal wave in the ablation regime. Regime change can be achieved simply by switching the laser power, with no change in the measurement setup. In order to demonstrate the usefulness of the proposed method, the elastic modulus of aluminum casting alloy has been measured and the results were compared with a conventional contact method and a destructive tensile test. They showed good agreement with each other, which verified the usefulness of the proposed noncontact elastic modulus measurement method.

Keywords

Elastic modulus Laser ultrasound Non-contact Non-destructive

분류 제목 조회 수
International Nondestructive Evaluation of Thermal Aging in Al6061 Alloy by measuring Acoustic Nonlinearity of Laser-generated Surface Acoustic Waves     20969
International Stress estimation using the acoustoelastic effect of surface waves in weak anisotropic materials     21028
International Comparison of Linear and Nonlinear Ultrasonic Parameters in Characterizing Grain Size and Mechanical Properties of 304L Stainless Steel     20465
International Internal defect detection using laser-generated longitudinal waves in ablation regime     41163
International Synthetic aperture imaging of contact acoustic nonlinearity to visualize the closing interfaces using tone-burst ultrasonic waves     44172
International Dependence of Nonlinear Ultrasonic Characteristic on Second-Phase Precipitation in Heat-Treated Al 6061-T6 alloy     42807
International Relative Measurement of the Acoustic Nonlinearity Parameter using Laser Detection of an Ultrasonic Wave  fileimage   49938
International A Method to Estimate the Absolute Ultrasonic Nonlinearity Parameter from Relative Measurements  fileimage   53242
International Finite element analysis of a low-velocity impact test for glass fiber-reinforced polypropylene composites considering mixed-mode interlaminar fracture toughness  fileimage   51202
International Assessment of Thermal Degradation by Cumulative Variation of Ultrasonic Nonlinear Parameter     92477
International Assessment of Thermal Aging of Aluminum Alloys by Acoustic Nonlinearity Measurement of Surface Acoustic Waves     89222
International Absolute Measurement and Relative Measurement of Ultrasonic Nonlinear Parameter     87551
International Experimental Comparison of Nonlinear Parameters Obtained from Absolute Measurement and Relative Measurement     88701
International Comparison of Ultrasonic Nonlinear Parameters Measured by PZT and LiNbO3 Transducers     88959
International Nanotribological and wetting performance of hierarchical patterns     89662
International Demonstration of Disturbance Propagation and Amplification in Car-Following Situation for Enhancement of Vehicle Platoon System     91503
International Relative Measurement of Acoustic Nonlinear Parameters and Comparison of Sensitivity to Thermal Aging     90967
International Non-contact Measurement of Elastic Modulus by using Laser Ultrasonic     93904
International Relationship between Second- and Third-order Acoustic Nonlinear Parameters in Relative Measurement     89121
International Non-Contact Evaluation of Acoustic Nonlinearity of a Laser-Generated Surface Wave in a Plastically Deformed Aluminum Alloy     89233
Board Pagination ‹ Prev 1 2 3 4 5 Next ›
/ 5
Designed by hikaru100

나눔글꼴 설치 안내


이 PC에는 나눔글꼴이 설치되어 있지 않습니다.

이 사이트를 나눔글꼴로 보기 위해서는
나눔글꼴을 설치해야 합니다.

설치 취소

SketchBook5,스케치북5

SketchBook5,스케치북5

SketchBook5,스케치북5

SketchBook5,스케치북5

ISNDE Laboratory
203-2,Engineering Center Annex
Hanyang University,
222 Wangsimni-ro, Seongdong-gu
Seoul 04763, Korea
04763 서울특별시 성동구 왕십리로 222
한양대학교 공업센터 별관 203-2호
지능계측 및 비파괴평가 연구실
Tel: 02 - 2220 - 4220
Fax: 02 - 2299 - 7207