Laser Ultrasound Techniques for Aerospace Applications
A special issue of Aerospace (ISSN 2226-4310). This special issue belongs to the section "Aeronautics".
Deadline for manuscript submissions: 15 September 2024 | Viewed by 163
Special Issue Editor
Special Issue Information
Dear Colleagues,
Ultrasonic testing plays a crucial role in ensuring structural integrity and performance evaluation across the aerospace industry. However, conventional contact ultrasound methods have limitations for in situ inspection of complex aircraft components. Recently, laser-based non-contact ultrasound techniques have shown great potential to address these challenges.
By using laser sources to generate and detect ultrasound waves, laser ultrasonic methods allow for remote and versatile inspection capabilities without requiring direct probe contact. This enables the evaluation of safety-critical or hard-to-reach areas on aircraft or spacecraft. Nonetheless, applications of laser ultrasound in real aerospace systems are still limited due to technical issues such as coupling efficiency, multi-modal wave detection, and interpretation of results under service conditions. Technological advancements are much needed to address these limitations. These include, among others, the development of efficient laser ultrasound generation and detection methodologies, the optimization of signal processing algorithms for aerospace materials, and the enhancement of inspection techniques for critical aerospace components
This Special Issue aims to advance the field by bringing together the latest research. Original contributions are invited to address topics including, but not limited to, innovative laser ultrasound generation and detection techniques; multi-modal wave analysis and imaging algorithms; coupling characterization for advanced materials and surfaces; laser-based simulation of pyroshock, mechanical shock waves, or acoustic emissions; and case studies demonstrating field trials. Both theoretical and experimental studies that propel the methodology toward routine industrial deployment are welcome.
Dr. Chen Ciang Chia
Guest Editor
Manuscript Submission Information
Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.
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Keywords
- laser ultrasound
- non-destructive testing
- aircraft structural integrity
- high-resolution imaging
- structural health monitoring
- signal processing algorithms
- material characterization
- complex geometries
- laser pyroshock simulation
- laser acoustic emission training
- machine learning
Planned Papers
The below list represents only planned manuscripts. Some of these manuscripts have not been received by the Editorial Office yet. Papers submitted to MDPI journals are subject to peer-review.
Title: Evaluation of the bond quality of metal clad plate using laser ultrasonic local resonance
Authors: Baoping Ji; Jianshu Cao; Qingdong Zhang
Affiliation: School of Mechanical Engineering, University of Science and Technology Beijing, Beijing 100083, China
Abstract: Metal clad plates have great application prospects in the field of aerospace because of their excellent comprehensive mechanical properties. The effective detection of delamination defects, especially sub-millimeter delamination defects, in metal clad plate is of great significance to improve product quality. In this work, the laser ultrasonic (LU) local resonance method is used to locate and characterize the sub-millimeter defects in stainless/carbon steel clad plate. The influence of the delamination radius on the amplitude and resonant frequency of the laser ultrasound was investigated using 2-D axisymmetric finite element (FE) simulations. The simulation results show that both the amplitude and the first resonance frequency (FRF) are effective features for detecting large-scale delamination defects, but the FRF is a better feature for detecting tiny delamination defects. The laser ultrasonic signals of different composite states collected in the experiment have good consistency with the simulated waveforms. The experimental results show that the laser ul-trasonic local resonance method is a high-resolution imaging method, which can locate and char-acterize the sub-millimeter delamination defects in stainless/carbon steel clad plate.
