Finite element simulation in laser ultrasound for non-destructive testing of aluminum defect materials

HUANG Yanjie; SHANG Jianhua; REN Lihong; CHENG Xiaojin

doi:10.5768/JAO201940.0107004

Journal of Applied Optics > 2019 > 40(1): 150-156. > DOI: 10.5768/JAO201940.0107004

HUANG Yanjie, SHANG Jianhua, REN Lihong, CHENG Xiaojin. Finite element simulation in laser ultrasound for non-destructive testing of aluminum defect materials[J]. Journal of Applied Optics, 2019, 40(1): 150-156. DOI: 10.5768/JAO201940.0107004

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Finite element simulation in laser ultrasound for non-destructive testing of aluminum defect materials

1.
School of Information Science and Technology, Donghua University, Shanghai 201620, China
2.
College of Mechanical Engineering, Shanghai University of Engineering Science, Shanghai 201620, China

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Received Date: August 29, 2018
Revised Date: September 25, 2018

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Abstract

Abstract

It is able to generate the ultrasonic waves on the surface of materials based on the laser-generated ultrasonic technology which is an important part of non-destructive testing for material defects. With the finite element analysis software of Abaqus, the defect model of the symmetric aluminum to be measured was established based on the laser ultrasonic thermo-elastic mechanism. Besides, the propagation characteristics of the laser-induced surface wave in the material and the interaction process between the laser-induced surface wave and the defects were simulated. Through the numerical simulation and theoretical analysis, the results show that the amplitude of the reflected wave increases with the depth of the defect and reaches steady state when the depth of the defect is up to a certain value. Instead, the width of the defect has a limited effect on the reflected wave. All of these conclusions can promote the development of the laser-generated ultrasonic technology for the detection and identification of the material defects.
- non-destructive testing,
- laser-generated ultrasonic,
- Rayleigh wave,
- finite element analysis

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Finite element simulation in laser ultrasound for non-destructive testing of aluminum defect materials