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Applied Sciences
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Applications on Ultrasonic Wave ‖
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Applications on Ultrasonic Wave ‖

A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Applied Physics General".

Deadline for manuscript submissions: closed (20 February 2022) | Viewed by 10998
Related Special Issue: Applications on Ultrasonic Wave

Special Issue Editor

Prof. Dr. Jaesun Lee

E-Mail Website
Guest Editor
School of Mechanical Engineering, Changwon National University, Changwon 51140, Republic of Korea
Interests: railway engineering; ultrasonic NDE/SHM (structural health monitoring); theoretical analysis; prognostic study; solid mechanics; structural analysis; applied mechanics; nonlinear ultrasonic
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

The field of ultrasonic waves has created much interest over the past several decades for nondestructive methodology to evaluate mechanical properties, damage states, and material condition of engineering structures. Features related to propagation and scattering of ultrasonic waves such as wave velocities, dispersion, scattered amplitudes, and attenuation show high sensitivity to material condition. Ultrasonic waves are also widely used in medicine to obtain images of internal body structures such as muscles, tendons, blood vessels, joints, and organs. The mechanism is that ultrasound pulses are sent into the tissue using a probe, and the reflected signals are recorded and analyzed in order to build the desired images of internal structures. The present Special Issue intends to explore new directions in the field of applications on ultrasonic waves. The interest includes but is not limited to the use of ultrasonic waves for engineering research areas such as nondestructive testing/evaluation, structural health, and condition monitoring of materials and structures and medical areas such as ultrasonic imaging, sensors, and signal analysis.

We invite you to submit breakthroughs in the understanding and application of ultrasonic waves, welcoming high-quality research, technical, and review papers on both theoretical and practical aspects.

Prof. Dr. Jaesun Lee
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.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Applied Sciences is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2400 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • ultrasonic waves
  • nondestructive testing/evaluation
  • structural health/condition monitoring
  • signal analysis
  • medical applications
  • engineering applications
  • theoretical analysis on wave propagation and scattering
  • ultrasonic wave imaging
  • new technologies on ultrasonic waves
  • wave signal analysis by machine learning and AI

Published Papers (4 papers)

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Research

16 pages, 3784 KiB  
Article
Research on Evolution Characteristics of Shale Crack Based on Simultaneous Monitoring of Multi-Parameters
by Qiao Chen, Fenglin Xu, Pengcheng Su, Honglin Zhu, Yifang Zhang, Yang Liu, Dongming Jia, Xiaozai Guo, Jilong Chen and Dunlong Liu
Appl. Sci. 2022, 12(2), 860; https://0-doi-org.brum.beds.ac.uk/10.3390/app12020860 - 14 Jan 2022
Viewed by 1047
Abstract
Meso-crack evolution mechanism of shale is a key factor affecting the mechanical properties of shale. In order to explore evolution laws of cracks in shale during loading, a meso-crack monitoring system, loading test equipment and an automatic ultrasonic data acquisition system were set [...] Read more.
Meso-crack evolution mechanism of shale is a key factor affecting the mechanical properties of shale. In order to explore evolution laws of cracks in shale during loading, a meso-crack monitoring system, loading test equipment and an automatic ultrasonic data acquisition system were set up. On this basis, a set of experimental apparatus simultaneous monitoring multi-parameters of shale micro-crack was designed, and destruction experiments of shale samples with different bedding angles were carried out to find out evolution characteristics of cracks. The results show the following: (1) The designed apparatus can monitor ultrasonic, mechanical and video information simultaneously of crack evolution in the entire process of shale destruction under load to provide information for analyzing acoustic and mechanical characteristic responses of crack propagation at key time nodes. (2) With an increase in load, shale will undergo four stages of destruction: crack initiation, propagation, penetration and overall failure. In the course of these stages, acoustic characteristics and mechanical characteristics are in good agreement, which proves the validity of predicting rock mechanical parameters with acoustic data. (3) During the loading process of shale, the main amplitude of acoustic wave is more sensitive than mechanical parameters to the change of rock cracks. Research results have important theoretical reference value for evaluating wall stability of shale gas horizontal well with ultrasonic data. Full article
(This article belongs to the Special Issue Applications on Ultrasonic Wave ‖)
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17 pages, 9051 KiB  
Article
Ultrasonic Inspection for Welds with Irregular Curvature Geometry Using Flexible Phased Array Probes and Semi-Auto Scanners: A Feasibility Study
by Seong Jin Lim, Young Lae Kim, Sungjong Cho and Ik Keun Park
Appl. Sci. 2022, 12(2), 748; https://0-doi-org.brum.beds.ac.uk/10.3390/app12020748 - 12 Jan 2022
Cited by 9 | Viewed by 3935
Abstract
Pipes of various shapes constitute pipelines utilized in industrial sites. These pipes are coupled through welding, wherein complex curvatures such as a flange, an elbow, a reducer, and a branch pipe are often found. Using phased array ultrasonic testing (PAUT) to inspect weld [...] Read more.
Pipes of various shapes constitute pipelines utilized in industrial sites. These pipes are coupled through welding, wherein complex curvatures such as a flange, an elbow, a reducer, and a branch pipe are often found. Using phased array ultrasonic testing (PAUT) to inspect weld zones with complex curvatures is faced with different challenges due to parts that are difficult to contact with probes, small-diameter pipes, spatial limitations due to adjacent pipes, nozzles, and sloped shapes. In this study, we developed a flexible PAUT probe (FPAPr) and a semi-automatic scanner that was improved to enable stable FPAPr scanning for securing its inspection data consistency and reproducibility. A mock-up test specimen was created for a flange, an elbow, a reducer, and a branch pipe. Artificial flaws were inserted into the specimen through notch and hole processing, and simulations and verification experiments were performed to verify the performance and field applicability of the FPAPr and semi-automatic scanner. Full article
(This article belongs to the Special Issue Applications on Ultrasonic Wave ‖)
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16 pages, 5153 KiB  
Article
A Feasibility Study for a Nonlinear Guided Wave Mixing Technique
by Junpil Park, Jeongseok Choi and Jaesun Lee
Appl. Sci. 2021, 11(14), 6569; https://0-doi-org.brum.beds.ac.uk/10.3390/app11146569 - 16 Jul 2021
Cited by 3 | Viewed by 1807
Abstract
Ultrasonic non-destructive testing is an effective means of examining objects without destroying them. Among such testing, ultrasonic nonlinear evaluation is used to detect micro-damage, such as corrosion or plastic deformation. In terms of micro-damage evaluation, the data that comes from amplitude comparison in [...] Read more.
Ultrasonic non-destructive testing is an effective means of examining objects without destroying them. Among such testing, ultrasonic nonlinear evaluation is used to detect micro-damage, such as corrosion or plastic deformation. In terms of micro-damage evaluation, the data that comes from amplitude comparison in the frequency domain plays a significant role. Its technique and parameter are called ultrasonic nonlinear technique and nonlinearity. A certain portion of nonlinearity comes from the equipment system, while the other portion of nonlinearity comes from the material. The former is system nonlinearity, while the latter is material nonlinearity. System nonlinearity interferes with interpretation, because its source is not from the material. In this study, in order to minimize system effects, a mixing technique is implemented. To use the large area inspection ability of the guided wave, the main research issue in this paper is focused on the guided wave mixing technique. Moreover, several bulk wave mixing theory equations become good concepts for guided wave mixing theoretical study, and the conventional nonlinear technique and guided wave mixing experimental results are compared in this study to confirm the reliability. This technique can play an important role in quantitatively discriminating fine damage by minimizing the nonlinearity of the equipment system. Full article
(This article belongs to the Special Issue Applications on Ultrasonic Wave ‖)
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12 pages, 14057 KiB  
Article
Transient Structural Analysis of a Skid Mounted on a Hydrogen Tube Trailer under Shock and Vibration Induced by Road Irregularities
by Sungwook Kang, Hwanjin Kim, Jaewoong Kim, Hyoungchan Kim, Jinseok Jang, Byungmoon Kwak, Kiseok Choi and Hong-Lae Jang
Appl. Sci. 2021, 11(9), 3779; https://0-doi-org.brum.beds.ac.uk/10.3390/app11093779 - 22 Apr 2021
Cited by 4 | Viewed by 3195
Abstract
Due to environmental pollution and depletion of fossil fuels, hydrogen is becoming an increasingly practical, clean and environmentally friendly option for transportation and energy storage among all green alternative energy sources introduced. Hydrogen storage and delivery is expensive because of the lower energy [...] Read more.
Due to environmental pollution and depletion of fossil fuels, hydrogen is becoming an increasingly practical, clean and environmentally friendly option for transportation and energy storage among all green alternative energy sources introduced. Hydrogen storage and delivery is expensive because of the lower energy density per unit volume as compared with conventional fossil fuels. Hence, hydrogen is usually stored in a gaseous state and delivered via tube trailers or pipelines. In this study, a transient structural analysis of a skid structure mounted on a hydrogen tube trailer was performed under shock load induced by road irregularities. The dynamics of the driving trailer according to the unevenness of the road surface were obtained through multibody dynamic simulations considering the full car model equipped with 64 hydrogen tubes. The transient structural analysis of the tube skid was performed by considering the resulting acceleration values as constraints. Through the sequential simulations, we evaluated the structural safety of the designed tube skid mounted on a trailer during hydrogen transport. Full article
(This article belongs to the Special Issue Applications on Ultrasonic Wave ‖)
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