Finite element simulation of laser generated ultrasound waves in aluminum plates

Soltani, P.; Akbareian, Negar

doi:10.1590/s1679-78252014001000004

Cited by 14 publications

(5 citation statements)

References 9 publications

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“…This boundary condition includes both the thermal effect of the laser and the temporal and spatial distribution functions of the laser pulse. The thermal effect is simulated via heat equation [42][43][44].…”

Section: Materials Parametersmentioning

confidence: 99%

Thin Copper Plate Defect Detection Based on Lamb Wave Generated by Pulsed Laser in Combination with Laser Heterodyne Interference Technique

Wang,

Zhu,

Guo

et al. 2024

Sensors

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Thin copper plate is widely used in architecture, transportation, heavy equipment, and integrated circuit substrates due to its unique properties. However, it is challenging to identify surface defects in copper strips arising from various manufacturing stages without direct contact. A laser ultrasonic inspection system was developed based on the Lamb wave (LW) produced by a laser pulse. An all-fiber laser heterodyne interferometer is applied for measuring the ultrasonic signal in combination with an automatic scanning system, which makes the system flexible and compact. A 3-D model simulation of an H62 brass specimen was carried out to determine the LW spatial-temporal wavefield by using the COMSOL Multiphysics software. The characteristics of the ultrasonic wavefield were extracted through continuous wavelet transform analysis. This demonstrates that the A0 mode could be used in defect detection due to its slow speed and vibrational direction. Furthermore, an ultrasonic wave at the center frequency of 370 kHz with maximum energy is suitable for defect detection. In the experiment, the size and location of the defect are determined by the time difference of the transmitted wave and reflected wave, respectively. The relative error of the defect position is 0.14% by averaging six different receiving spots. The width of the defect is linear to the time difference of the transmitted wave. The goodness of fit can reach 0.989, and it is in good agreement with the simulated one. The experimental error is less than 0.395 mm for a 5 mm width of defect. Therefore, this validates that the technique can be potentially utilized in the remote defect detection of thin copper plates.

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Section: Materials Parametersmentioning

confidence: 99%

Thin Copper Plate Defect Detection Based on Lamb Wave Generated by Pulsed Laser in Combination with Laser Heterodyne Interference Technique

Wang,

Zhu,

Guo

et al. 2024

Sensors

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“…(iii) The Al states such as the dynamics of temperature and pressure can be studied by heating a Besides AuNPs, there are several studies on other metals for LGUS transmitters. (i) The laser-generated surface acoustic waves in an Al plate are studied by the finite element model [48]. It is found that the laser parameters are influential factors on the induced ultrasound waves.…”

Section: Metallic Absorbersmentioning

confidence: 99%

Review of Laser-Generated Ultrasound Transmitters and Their Applications to All-Optical Ultrasound Transducers and Imaging

Chen

2016

Applied Sciences

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Abstract:Medical ultrasound is an imaging technique that utilizes ultrasonic signals as information carriers, and has wide applications such as seeing internal body structures, finding a source of a disease, and examining pregnant women. The most commonly used ultrasonic transducer today is based on piezoelectricity. The piezoelectric transducer, however, may have a limited bandwidth and insufficient sensitivity for reduced element size. Laser-generated ultrasound (LGUS) technique is an effective way to resolve these issues. The LGUS approach based on photoacoustic effect is able to greatly enhance the bandwidth of ultrasound signals and has the potential for high-resolution imaging. High-amplitude LGUS could also be used for therapy to accomplish high precision surgery without an incision. Furthermore, LGUS in conjunction with optical detection of ultrasound allows all-optical ultrasound imaging (i.e., ultrasound is generated and received optically). The all-optical platform offers unique advantages in providing high-resolution information and in facilitating the construction of miniature probes for endoscopic ultrasound. In this article, a detailed review of the recent development of various LGUS transmitters is presented. In addition, a recent research interest in all-optical ultrasound imaging, as well as its applications, is also discussed.

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“…A numerical method is a flexible and economical way to deal with complicated processes, especially for parametric studies. Peyman et al [6] studied the effects of laser parameters with the finite element method for an aluminum plate. However, few researchers have focused on steel material, even Q345 steel.…”

Section: Introductionmentioning

confidence: 99%

The effects of laser parameters on the excitation of laser-generated surface acoustic waves in the Q345 steel

2023

Fourth International Conference on Optoelectronic Science and Materials (ICOSM 2022)

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Nondestructive testing plays an important role in modern cities. Laser-generated surface acoustic waves (SAWs) are widely used in the nondestructive testing of structures due to their advantages, such as being non-contact and having a wide frequency bandwidth, long distance propagation, little attenuation, and so on. Q345 steel is currently used in many areas, especially in large structures. In order to utilize laser-generated SAWs more reasonably, this paper discusses the effects of laser parameters on the excitation of SAWs in Q345 steel with the numerical method. The three parameters of the pulse energy, rise time, and pulse width are discussed separately. The results show that the amplitude of displacement is directly proportional to the pulse energy and inversely proportional to the rise time and pulse width. These proposed results can provide a guideline for the choice of the excitation parameters in the laser-generated SAWs nondestructive evaluation on Q345 steel.

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Finite element simulation of laser generated ultrasound waves in aluminum plates

Cited by 14 publications

References 9 publications

Thin Copper Plate Defect Detection Based on Lamb Wave Generated by Pulsed Laser in Combination with Laser Heterodyne Interference Technique

Thin Copper Plate Defect Detection Based on Lamb Wave Generated by Pulsed Laser in Combination with Laser Heterodyne Interference Technique

Review of Laser-Generated Ultrasound Transmitters and Their Applications to All-Optical Ultrasound Transducers and Imaging

The effects of laser parameters on the excitation of laser-generated surface acoustic waves in the Q345 steel

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