Journal articles: 'Non-destructive testing (NDT)'

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Mineo, Carmelo, and Yashar Javadi. "Robotic Non-Destructive Testing." Sensors 22, no. 19 (October 9, 2022): 7654. http://dx.doi.org/10.3390/s22197654.

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Non-destructive testing (NDT) and evaluation (NDE) are commonly referred to as the vast group of analysis techniques used in civil, medical, and industrial sectors to evaluate the properties of materials, tissues, components, or structures without causing any damage [...]

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Раiuk, David, Edgardo A. La Bruna, and Mariano S. Zecchi. "Digital NDT (Non Destructive Testing)." IFAC Proceedings Volumes 28, no. 19 (September 1995): 341–46. http://dx.doi.org/10.1016/s1474-6670(17)45103-2.

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D. A., Oke,, Oladiran, G. F, and Raheem, S. B. "Correlation between Destructive Compressive Testing (DT) and Non Destructive Testing (NDT) for Concrete Strength." International Journal of Engineering Research and Science 3, no. 5 (May 31, 2017): 27–30. http://dx.doi.org/10.25125/engineering-journal-ijoer-may-2017-12.

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Kumar, Anish, and Walter Arnold. "High resolution in non-destructive testing: A review." Journal of Applied Physics 132, no. 10 (September 14, 2022): 100901. http://dx.doi.org/10.1063/5.0095328.

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Since the beginning of the applications of non-destructive testing/evaluation (NDT/NDE) techniques, efforts have been made consistently to improve their detection sensitivity and resolution. In the present paper, factors governing lateral resolution in three major NDT techniques, viz., ultrasonic testing (UT), x-ray radiographic testing (XRT), and eddy current testing (ECT) are presented. Furthermore, a review of recent advances in these NDT techniques to reach the theoretically achievable resolution limit or even surpassing the same using alternate approaches is also discussed. For example, resolution in UT is theoretically limited to half the wavelength by the Rayleigh limit; however, subwavelength resolutions have been achieved through the applications of near field methods by capturing the evanescent field. On the other hand, the resolution achieved in XRT is primarily limited to half the source/focal spot size, which is many orders of magnitude larger than the wavelength. Over the years, the reduction in the focal spot from macro-focus to micro-focus and now to nano-focus has led to improvement in the resolution to a few nanometers, of course, in combination with suitable magnification required due to detectors with limited pixel size (a few μm to a few 10 s of μm). Similarly, innovations in electromagnetic/magnetic sensors have significantly improved the resolution achieved in ECT. Atomic force microscopy, metamaterials, and artificial neural network-based methods have been employed for obtaining high-resolution NDE images. At the end, authors' perspective toward possible directions for high-resolution NDT is presented.

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M K, Faseela. "Non-Destructive Testing in Engineering." International Journal for Research in Applied Science and Engineering Technology 12, no. 11 (November 30, 2024): 2193–201. https://doi.org/10.22214/ijraset.2024.65577.

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Non-destructive testing (NDT) methods are a group of tests allowing one to detect external (surface) as well as internal defects of a structure. It is mandatory to test any material prior to taking into use for engineering purpose or other uses; whether it meetsthe laid down requirement as perstandard specification or not to help in financial saving and prevent failure in service. This review article provides the earlier, recent advances and research about Non-Destructive Testing (NDT) such as Visual Inspection (VI), Liquid Penetration Testing (LPT), Magnetic Particle Inspection (MPI), Ultrasonic Testing (UT), Radiographic Testing (RT), Acoustic Emission Testing (AET), etc in various fields.

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Safhi, Amine el Mahdi, Gilberto Cidreira Keserle, and Stéphanie C. Blanchard. "AI-Driven Non-Destructive Testing Insights." Encyclopedia 4, no. 4 (November 21, 2024): 1760–69. http://dx.doi.org/10.3390/encyclopedia4040116.

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Non-destructive testing (NDT) is essential for evaluating the integrity and safety of structures without causing damage. The integration of artificial intelligence (AI) into traditional NDT methods can revolutionize the field by automating data analysis, enhancing defect detection accuracy, enabling predictive maintenance, and facilitating data-driven decision-making. This paper provides a comprehensive overview of AI-enhanced NDT, detailing AI models and their applications in techniques like ultrasonic testing and ground-penetrating radar. Case studies demonstrate that AI can improve defect detection accuracy and reduce inspection times. Challenges related to data quality, ethical considerations, and regulatory standards were discussed as well. By summarizing established knowledge and highlighting advancements, this paper serves as a valuable reference for engineers and researchers, contributing to the development of safer and more efficient infrastructure management practices.

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Veselá, Jana, Pavel Zahrádka, and Jan Matějíček. "Replicas Application in Non-Destructive Testing." Defect and Diffusion Forum 417 (June 28, 2022): 123–27. http://dx.doi.org/10.4028/p-j3ecpk.

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Abstra c t The use of replication kits has recently become an integral part of the field of non-destructive testing (NDT). Classical surface NDT methods are thus advantageously supplemented by surface prints in selected places of the inspected material. Replicate kits are set to be the fingerprint surface structure requiring no special surface preparation prior to collection of replicas and are intended for the 3D measurement of the dimensions of surface defects. Replicas are then evaluated using a 3D optical profilometer with optical or laser-optical lenses.

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Lee, Sangwook, and Nikolas Kalos. "BRIDGE INSPECTION PRACTICES USING NON-DESTRUCTIVE TESTING METHODS." Journal of Civil Engineering and Management 21, no. 5 (May 6, 2015): 654–65. http://dx.doi.org/10.3846/13923730.2014.890665.

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Non-Destructive Testing (NDT) methods have been developed and employed as a means of rapid and effective structural inspection. Despite the various kinds of NDT methods developed for bridge inspection, not much study has been performed on their usage and effectiveness at a practical level. This paper presents an evaluation of NDT methods to identify how they are implemented in state agencies in the U.S. The findings and analysis presented herein were based on the results obtained from a survey questionnaire, targeted at Departments of Transportation (DOTs) in all U.S. states and territories. The survey questionnaire was initiated to clarify multiple issues regarding NDT implementation, such as identifying the types of inspection that involve NDT methods, bridge components that are most likely to be inspected with NDT, effective methods of inspecting concrete or steel structures, and so on. A total of 40 state agencies participated in the survey processing, and the major findings obtained from the states are illustrated and explained in detail in this paper. In addition, bridge defects that are hard to detect in the course of inspection and current research efforts to develop novel NDT methods were investigated.

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Ulus, Özlem, Furkan Eren Davarcı, and Elif Eren Gültekin. "Non-destructive testing methods commonly used in aviation." International Journal of Aeronautics and Astronautics 5, no. 1 (June 30, 2024): 10–22. http://dx.doi.org/10.55212/ijaa.1418742.

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Non-Destructive Testing (NDT) methods play a pivotal role in ensuring the safety and reliability of aircraft in the aviation industry. This article provides a comprehensive overview of the NDT techniques commonly employed in aviation to assess the structural integrity and performance of aircraft components and materials without causing any damage. The article discusses the significance of NDT in aviation, highlighting the importance of early defect detection, maintenance cost reduction, and enhanced operational safety. It delves into various NDT methods, such as ultrasonic testing, eddy current testing, radiographic inspection, magnetic particle testing, and dye penetrant testing, explaining their principles and applications. In addition, in this article, the advantages and disadvantages of NDT methods and which methods are used in which part of the aircraft are mentioned. Understanding these NDT methods is crucial for aviation professionals, as they contribute to the continued airworthiness of aircraft, ensuring that passengers and crew can travel safely and confidently.

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Sadowski, Łukasz. "Non-Destructive Testing for Building Evaluation." Buildings 12, no. 7 (July 16, 2022): 1030. http://dx.doi.org/10.3390/buildings12071030.

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Khedmatgozar Dolati, Seyed Saman, Nerma Caluk, Armin Mehrabi, and Seyed Sasan Khedmatgozar Dolati. "Non-Destructive Testing Applications for Steel Bridges." Applied Sciences 11, no. 20 (October 19, 2021): 9757. http://dx.doi.org/10.3390/app11209757.

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The growing population and increasing demand for surface transportation have highlighted the importance of maintaining safe and reliable civil infrastructures for daily use. Among all civil infrastructures, bridges are one of the most important elements in the transportation system. As such, to prevent any failures caused by aging and environmental impacts, bridges require periodic inspections. This becomes even more critical due to climate change and its effect on bridges, especially in the coastal regions. Most of the inspections conducted incorporate the visual type of evaluation due to its simplicity. However, with the current developments in new technologies, there is a need for more advanced techniques of structural health monitoring (SHM) methods to be incorporated in the maintenance programs for more accurate and efficient surveys. In this paper, non-destructive testing (NDT) methods applicable to steel bridges are reviewed, with a focus on methods applicable to local damage detection. Moreover, the methodology, advantages and disadvantages, and up-to-date research on NDT methods are presented. Furthermore, the application of novel NDT techniques using innovative sensors, drones, and robots for the rapid and efficient assessment of damages on small and large scales is emphasized. This study is deemed necessary as it compiles in one place the available information regarding NDT methods for in-service steel bridges. Access to such information is critical for researchers who intend to work on new or improved NDT techniques.

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J. Helal, M. Sofi, and Priyan Mendis. "Non-Destructive Testing of Concrete: A Review of Methods." Electronic Journal of Structural Engineering 14, no. 1 (January 1, 2015): 97–105. http://dx.doi.org/10.56748/ejse.141931.

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This paper reviews the most common non-destructive testing (NDT) methods of concrete structures as utilized by the structural engineering industry. The fundamentals of NDT methods are explored in regards to their potential, limitations, inspection techniques and interpretations. The factors that influence the success of NDT methods are discussed and ways to mediate their influence are recommended. Reference is made to standard guidelines for the application and interpretation of the discussed NDT methods. NDT of concrete was found to be gaining increasing acceptance as a means of evaluating the strength, uniformity, durability and other properties of existing concrete structures. Perceptions of NDT inadequacy were attributable to lack of understanding construction materials and NDT methods themselves. The intent of this paper is to address these concerns by identifying and describing the most common successful methods of NDT as applied to concrete structures.

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Peruń, Grzegorz. "Advances in Non-Destructive Testing Methods." Materials 17, no. 3 (January 24, 2024): 554. http://dx.doi.org/10.3390/ma17030554.

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Hoła, Jerzy, and Łukasz Sadowski. "Non-Destructive Testing in Civil Engineering." Applied Sciences 12, no. 14 (July 17, 2022): 7187. http://dx.doi.org/10.3390/app12147187.

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The progressive development of civil engineering has forced scientists to improve the known methods and techniques of testing building materials, and also to search for new ones, e.g., non-destructive testing (NDT) methods [...]

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Zechel, Fabian, Rouwen Kunze, Niels König, and Robert Heinrich Schmitt. "Optical coherence tomography for non-destructive testing." tm - Technisches Messen 87, no. 6 (June 25, 2020): 404–13. http://dx.doi.org/10.1515/teme-2019-0098.

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AbstractIn this review paper, conventional non-destructive testing (NDT) methods are briefly introduced and compared with selected examples for applications of optical coherence tomography (OCT) for NDT. The contactless, non-destructive and purely optical method enables multi-dimensional imaging for tomographic real-time evaluation in various fields of application. Depending on the material, penetration depths of several millimeters can be achieved, thus providing an attractive solution that can be used both as a stand-alone and as a process-integrated solution.

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She, Yulong, Jie Tang, Chaoyang Wang, Zhicheng Wang, Zhengren Huang, and Yong Yang. "Nano-Additive Manufacturing and Non-Destructive Testing of Nanocomposites." Nanomaterials 13, no. 20 (October 10, 2023): 2741. http://dx.doi.org/10.3390/nano13202741.

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In the present work, the recent advancements in additive manufacturing (AM) techniques for fabricating nanocomposite parts with complex shaped structures are explained, along with defect non-destructive testing (NDT) methods. A brief overview of the AM processes for nanocomposites is presented, grouped by the type of feedstock used in each technology. This work also reviews the defects in nanocomposites that can affect the quality of the final product. Additionally, a detailed description of X-CT, ultrasonic phased array technology, and infrared thermography is provided, highlighting their potential application in non-destructive inspection of nanocomposites in the future. Lastly, it concludes by offering recommendations for the development of NDT methods specifically tailored for nanocomposites, emphasizing the need to utilize NDT methods for optimizing nano-additive manufacturing process parameters, developing new NDT techniques, and enhancing the resolution of existing NDT methods.

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Gupta, Mridul, and Muhsin Ahmad``` Khan. "Advances in applications of non-destructive testing (NDT): a review." International research journal of engineering, IT & scientific research 7, no. 3 (April 27, 2021): 76–86. http://dx.doi.org/10.21744/irjeis.v7n3.1003.

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Manufacturing defects and discontinuities in a product are anomalies which can lead to severe damages which may sometimes involve loss of life. These defects must be examined and corrected before the product goes into service. There are two methods of testing a product for defects and discontinuities viz. Destructive Testing and Non-Destructive Testing. Destructive Testing entails subjecting the product to conditions that leads to failure of the product whereas Non-Destructive Testing (NDT) is the process of examining the products for defects in a way in which it retains its usefulness for future service. This paper discusses various methods involved in NDT such as Visual Testing, Magnetic Particle Inspection, Penetrant Testing, Ultrasonic Testing, Radiographic Testing, Acoustic Emission and Eddy Current Testing with a major focus on advances in the applications of NDT.

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Matveev, V. I., and P. E. Kleyzer. "IX INTERNATIONAL INDUSTRIAL FORUM "TERRITORY NDT – 2022"." Kontrol'. Diagnostika, no. 295 (January 2023): 45–56. http://dx.doi.org/10.14489/td.2023.01.pp.045-056.

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A brief overview of the events of the IX International Industrial Forum “NDT Territory. Non-destructive testing. Tests. Diagnostics” Within the framework of the forum, round tables were held on topical problems of non-destructive testing and technical diagnostics, a youth scientific and technical conference, the All-Russian competition of final qualification works “New Generation – 2022”, the final of the All-Russian competition on non-destructive testing “Defectoscopist 2022” and a National Prize in the field non-destructive testing and technical diagnostics. At the exhibition of instruments and equipment, modern means of NDT and TD were presented. The review briefly discusses the main achievements of companies in the field of creation and application of technical means intended for testing, measuring and non-destructive testing of modern structures and materials for various purposes. These are means of vibration diagnostics and non-destructive testing based on the use of various physical methods for the interaction of radiation and fields with the substance and the object of control. Brief information about the companies involved in solving these problems is given.

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Matveev, V. I., and P. E. Kleyzer. "VIII INTERNATIONAL INDUSTRIAL FORUM "TERRITORY NDT – 2021"." Kontrol'. Diagnostika, no. 283 (January 2022): 46–55. http://dx.doi.org/10.14489/td.2022.01.pp.046-055.

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A brief overview of the events of the VIII International Industrial Forum “NDT Territory. Non-destructive testing. Tests. Diagnostics” The exhibition of NDT and TD instruments and tools was accompanied by a business program. Within the framework of the forum, round tables were held on topical problems of non-destructive testing and technical diagnostics, a youth scientific and technical conference, the All-Russian competition of final qualification works “New Generation – 2021”, the final of the All-Russian competition on non-destructive testing “Defectoscopist 2021” and a national prize in the field non-destructive testing and technical diagnostics.

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Artemiev, B. V., D. I. Galkin, V. I. Matveev, G. V. Zusman, and A. V. Kovalev. "FORUM «TERRITORY OF NDT» 2020." Kontrol'. Diagnostika, no. 263 (May 2020): 51–63. http://dx.doi.org/10.14489/td.2020.05.pp.051-063.

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A brief analytical review of the events of the VII International Industrial Forum “NDT Territory. Non-Destructive testing. Tests. Diagnostics” and the “XXII Аll-Russian Scientific and Technical Conference on Non-Destructive Control and Technical Diagnostics” held simultaneously with it. All events were held at the Expocenter Central Exhibition Complex in Moscow. The exhibition of instruments and tools of NK and TD was accompanied by a business program. Within the framework of the forum, round tables were held on topical issues of non-destructive testing and technical diagnostics. The exhibition was attended by more than 57 companies, and information support was provided by a number of news agencies, including the “Spectrum Publishing House” and “RIA Standards and Quality” (“World of Measurement” magazine). In addition to equipment for non-destructive testing and technical diagnostics, modern test equipment, testing and analytical equipment begins to appear on the stands of exhibitors. This year there was a focus on hightech solutions for engineering, metallurgy, oil and gas and other industries. The final of the competition for NK specialists and the award ceremony took place. For the first time, the “Salon of Innovations and Startups 2020” was organized at this Forum, in which representatives of 20 organizations took part. The forum demonstrated a high technical level of non-destructive testing, their metrological support, as well as certification and standardization.

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Artemiev, B. V., D. I. Galkin, V. I. Matveev, G. V. Zusman, and A. V. Kovalev. "FORUM «TERRITORY OF NDT» 2020." Kontrol'. Diagnostika, no. 263 (May 2020): 51–63. http://dx.doi.org/10.14489/td.2020.05.pp.051-063.

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A brief analytical review of the events of the VII International Industrial Forum “NDT Territory. Non-Destructive testing. Tests. Diagnostics” and the “XXII Аll-Russian Scientific and Technical Conference on Non-Destructive Control and Technical Diagnostics” held simultaneously with it. All events were held at the Expocenter Central Exhibition Complex in Moscow. The exhibition of instruments and tools of NK and TD was accompanied by a business program. Within the framework of the forum, round tables were held on topical issues of non-destructive testing and technical diagnostics. The exhibition was attended by more than 57 companies, and information support was provided by a number of news agencies, including the “Spectrum Publishing House” and “RIA Standards and Quality” (“World of Measurement” magazine). In addition to equipment for non-destructive testing and technical diagnostics, modern test equipment, testing and analytical equipment begins to appear on the stands of exhibitors. This year there was a focus on hightech solutions for engineering, metallurgy, oil and gas and other industries. The final of the competition for NK specialists and the award ceremony took place. For the first time, the “Salon of Innovations and Startups 2020” was organized at this Forum, in which representatives of 20 organizations took part. The forum demonstrated a high technical level of non-destructive testing, their metrological support, as well as certification and standardization.

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Rojas-Vargas, Fernando, Juan Benito Pascual-Francisco, and Tonatiuh Hernández-Cortés. "Applications of Shearography for Non-Destructive Testing and Strain measurement." International Journal of Combinatorial Optimization Problems and Informatics 11, no. 3 (January 3, 2020): 21–36. https://doi.org/10.61467/2007.1558.2020.v11i3.172.

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Non-Destructive Testing (NDT) technologies have gain importance recently due to the demand of high quality and costs optimization in products. Thus, optical non-contact techniques have been developed, which also have been well accepted in the industry. This work present a background of developments and applications of shearing speckle pattern interferometry, known as shearography, for NDT analysis. Also, some important experimental results, from authors, for NDT analysis and strain measurement are reported.

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Zhu, Qi Fang, Ze Ming Sun, Tong Da Ma, Pu Li, Dong Hui Zhang, and Vladimir Platonovič Vavilov. "Thermal Non-Destructive Testing for the Titanium Implants." Advanced Materials Research 785-786 (September 2013): 52–57. http://dx.doi.org/10.4028/www.scientific.net/amr.785-786.52.

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Active thermal NDT is a promising technique for the detection of structural defects in solids. In this paper, the results of the first-stage research devoted to infrared thermographic detection of cracks in titanium alloys are presented. The test results obtained show that the Fourier analysis is a convenient data processing technique in active thermal NDT. Images of phase are more noise-resistant and able to reveal deeper defects compared to images of amplitude. In application to the inspection of bottom-hole defects in 9.6 mm-thick Ti6Al4V titanium alloy samples, it has been found that a minimum detected defect should have diameter from one to two times greater than its depth.

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Luo, Yi, Ying Li, Zai Xiu Chen, Kai Wang, and Yong Han. "Automatic Control Instrument of γ-Ray Non-Destructive Testing Equipment." Advanced Materials Research 271-273 (July 2011): 945–48. http://dx.doi.org/10.4028/www.scientific.net/amr.271-273.945.

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With the NDT radioactive isotope widely used in engineering, it puts forward higher requirements for NDT. As the complexity of the device working environment and high reliability requirements, system reliability and security is the focus of the entire design. This NDT uses PT and PLC to operate and control machine and optical encoder to achieve the collection of the source location parameters, DC torque motor drive to ensure jitter-free, long locked rotor, uniform speed drive performance to ensure machine security and stability.

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Guo, Canzhi, Chunguang Xu, Juan Hao, Dingguo Xiao, and Wanxin Yang. "Ultrasonic Non-Destructive Testing System of Semi-Enclosed Workpiece with Dual-Robot Testing System." Sensors 19, no. 15 (July 31, 2019): 3359. http://dx.doi.org/10.3390/s19153359.

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With the rapid development of material science, more and more workpieces, especially workpieces with complex curved surfaces, are being made of composite materials. Robotic non-destructive testing (NDT) systems for complex curved surface composite material parts are being used more and more. Despite the emergence of such flexible NDT systems, the detection of semi-enclosed parts is also a challenge for robotic NDT systems. In order to overcome the problem, this paper establishes an NDT solution for semi-enclosed workpieces based on a dual-robot system of synchronous motion, in which an extension arm is installed on one of the robots and presents a trajectory planning method that always ensures the extension arm is parallel to the rotary axis of a semi-enclosed workpiece and that the ultrasonic probes are perpendicular to the workpiece surface. Trajectory analysis experiments and ultrasonic NDT experiments utilizing the optimal water path distance determined by simulation result of multi-Gaussian beam model for two types of semi-enclosed workpieces are performed with the dual-robot NDT system. Experimental results prove that the dual-robot NDT scheme functions well and the planned trajectories are correct. All the hole-shaped artificial defects with diameters ≥3 mm are detected by using 2.25 MHz ultrasonic probes through the transmission testing method. Vivid 3D C-scan image of a small diameter cylindrical workpiece based on the testing result is provided for convenience of observation.

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Yousefi, Ibarra-Castanedo, and Maldague. "Infrared Non-Destructive Testing via Semi-Nonnegative Matrix Factorization." Proceedings 27, no. 1 (September 20, 2019): 13. http://dx.doi.org/10.3390/proceedings2019027013.

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Detection of subsurface defects is undeniably a growing subfield of infrared non-destructive testing (IR-NDT). There are many algorithms used for this purpose, where non-negative matrix factorization (NMF) is considered to be an interesting alternative to principal component analysis (PCA) by having no negative basis in matrix decomposition. Here, an application of Semi non-negative matrix factorization (Semi-NMF) in IR-NDT is presented to determine the subsurface defects of an Aluminum plate specimen through active thermographic method. To benchmark, the defect detection accuracy and computational load of the Semi-NMF approach is compared to state-of-the-art thermography processing approaches such as: principal component thermography (PCT), Candid Covariance-Free Incremental Principal Component Thermography (CCIPCT), Sparse PCT, Sparse NMF and standard NMF with gradient descend (GD) and non-negative least square (NNLS). The results show 86% accuracy for 27.5s computational time for SemiNMF, which conclusively indicate the promising performance of the approach in the field of IR-NDT.

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Wu, Cui Qin, Wei Ping Wang, Qi Gang Yuan, Yan Jun Li, Wei Zhang, and Xiang Dong Zhang. "Infrared Thermography Non-Destructive Testing of Composite Materials." Advanced Materials Research 291-294 (July 2011): 1307–10. http://dx.doi.org/10.4028/www.scientific.net/amr.291-294.1307.

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To detect the delamination, disbond，inclusion defects of the glass fiber composite materials applied in the solid rocket motor, active infrared thermographic non-destructive testing(NDT) is researched. The samples including known defects are heated by pulsed high energy flash lamp. The surface temperature of the samples is monitored by infrared thermography camera. The results of the experiments show that the active infrared thermography technique is a fast and effective inspection method for detecting the defects of delamination, disbond，inclusion of the composites. The samples are also detected by underwater ultrasonic c-scans. The paper concludes that the active infrared thermography NDT is more suitable to rapidly detect the defect in large-area and the underwater ultrasonic c-scans is more suitable to quantitatively identify the defect in local-area.

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Dashtizadeh, Zahra, Aidy Ali, and Abdan Khalina. "A Review of Non-Destructive Thermography Techniques Toward Structural Integrity of Bio-Composites." Key Engineering Materials 471-472 (February 2011): 103–8. http://dx.doi.org/10.4028/www.scientific.net/kem.471-472.103.

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It is well known those two popular methods of testing; destructive testing based on fracture mechanics and non-destructive testing (NDT) which does not make any damage in the specimen. NDT was first used for military purpose but nowadays it is used widely in many fields such as composite materials, medical purposes, fire safety, laser welding, food safety and quality and characterization of materials. The aim of this paper is to review the recent advancement of thermography non-destructive methods especially in testing a quality of bio-composites materials. The review reveals the advantages and disadvantages of pursuing any of the available methods in NDT on bio composite materials.

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Shukla, Anita, and Sumiti Narayan Tewari. "LASER BASED ULTRASONICS: A PRACTICAL TOOL FOR NON DESTRUCTIVE TESTING OF MATERIALS." YMER Digital 21, no. 02 (February 26, 2022): 647–53. http://dx.doi.org/10.37896/ymer21.02/61.

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Mechanical properties can be determined for all types of materials whether metals, ceramics, polymers, or composites. The material is hence used for specific purpose based on its property. Selection for an appropriate material and treatments for a particular application requires material testing. A material testing helps us to understand and compute whether a specific material is suitable for a particular application. A wide range of materials are available in market for various uses. The choice of material to the most appropriate selection for the intended use can be made easier with the help of material testing. In material characterization, the analysis of material properties and composition is useful in failure investigation and other problems, and in validating manufacturing processes. There are various testing methods available to test the materials. They are classified into two categories destructive testing and non-Destructive Testing (NDT). Present work focuses on superiority of NDT over destructive method and discusses about novel NDT material testing technique called Laser Based Ultrasonics (LBU) technique which is one of the NDT methods for testing and material characterization.

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Bhowmik, R. N., and J. Pal. "Correlation of non-destructive and destructive testing of concrete modified with rice husk ash and brick aggregate." Insight - Non-Destructive Testing and Condition Monitoring 64, no. 11 (November 1, 2022): 639–46. http://dx.doi.org/10.1784/insi.2022.64.11.639.

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Concrete structures may deteriorate over a period of time. Nowadays, to determine the extent of damage, various tests are being performed that are non-destructive by nature. A proper correlation between destructive testing (DT) and non-destructive testing (NDT) may enhance the use of NDT applications in the field of concrete structures. Although several correlations have been suggested by other authors for standard concrete, the correlation may change with the use of non-conventional materials such as rice husk ash (RHA) and brick aggregate (BA) in concrete. In this paper, NDT methods such as ultrasonic pulse velocity (UPV) testing and rebound hammer testing, as well as DT methods such as compressive strength testing, were performed on a special type of concrete in which BA was used as coarse aggregate and RHA was used as the partial replacement of cement. This modified concrete has been abbreviated as RHA-BA concrete. Material-specific prediction models based on linear regression and artificial neural network (ANN) were established after using the data from concrete specimens. A strong correlation was observed between NDT and DT when the RHA percentage was low. The best correlation between NDT and DT was found at 5% RHA. An RHA percentage beyond this yields a weaker correlation between NDT and DT. The linear regression model along with the k-fold validation technique and the ANN model have both proven to be efficient in predicting the compressive strength of RHA-BA concrete; however, the ANN model has proven to be more efficient than the linear regression model with a lower mean squared error (MSE) and higher R-square values.

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Cao, X. H., F. L. Luo, F. T. Bai, and Y. H. Zhang. "A DDS Waveform Generator for Electromagnetic Non-Destructive Testing." Key Engineering Materials 295-296 (October 2005): 661–66. http://dx.doi.org/10.4028/www.scientific.net/kem.295-296.661.

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A direct digital synthesis (DDS) waveform generator for electromagnetic non-destructive testing (NDT) is presented in order to improve the measurement quality. The advantage and disadvantage of analogue and digital circuit waveform generators are analyzed. The DDS technique is preferred. The principle of DDS technique is introduced and the hardware and software design of a DDS waveform generator is described. The characteristics of the waveform generator based on a DDS chip AD7008 are that the signal frequency is of high stability, high precision and high resolution. Furthermore, the amplitude, frequency and phase can be continuously adjusted. An experimental electromagnetic NDT system is built and the testing results are analyzed. The system uses digitally generated sine waves as exciting, reference and demodulation signals. Experimental results show that the DDS waveform generator improves the signal-to-noise ratio. This kind of wave generation circuit is used not only in NDT but also in other instruments, such as electrical impedance tomography (EIT), which need signals with high stability, high precision and high resolution.

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Yin, Duohao, and Qianjun Xu. "Comparison of Sandstone Damage Measurements Based on Non-Destructive Testing." Materials 13, no. 22 (November 16, 2020): 5154. http://dx.doi.org/10.3390/ma13225154.

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Non-destructive testing (NDT) methods are an important means to detect and assess rock damage. To better understand the accuracy of NDT methods for measuring damage in sandstone, this study compared three NDT methods, including ultrasonic testing, electrical impedance spectroscopy (EIS) testing, computed tomography (CT) scan testing, and a destructive test method, elastic modulus testing. Sandstone specimens were subjected to different levels of damage through cyclic loading and different damage variables derived from five different measured parameters—longitudinal wave (P-wave) velocity, first wave amplitude attenuation, resistivity, effective bearing area and the elastic modulus—were compared. The results show that the NDT methods all reflect the damage levels for sandstone accurately. The damage variable derived from the P-wave velocity is more consistent with the other damage variables, and the amplitude attenuation is more sensitive to damage. The damage variable derived from the effective bearing area is smaller than that derived from the other NDT measurement parameters. Resistivity provides a more stable measure of damage, and damage derived from the acoustic parameters is less stable. By developing P-wave velocity-to-resistivity models based on theoretical and empirical relationships, it was found that differences between these two damage parameters can be explained by differences between the mechanisms through which they respond to porosity, since the resistivity reflect pore structure, while the P-wave velocity reflects the extent of the continuous medium within the sandstone.

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Ottone Alves, Bento. "NDT applied to steel structures." Metálica, no. 24 (March 1, 2022): 46–48. http://dx.doi.org/10.30779/cmm_metalica_mi24_06.

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The quality control of the welds of a steel structure obviously involves the application of different methods of non-destructive testing (NDT). The main methods referred to in EN ISO 17635 - Non-destructive examination of welds - General rules for steel materials are:

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Darmon, Michel. "Special Issue on Ultrasonic Modeling for Non-Destructive Testing." Applied Sciences 14, no. 5 (February 29, 2024): 2008. http://dx.doi.org/10.3390/app14052008.

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Kouche, Ahmad El, and Hossam S. Hassanein. "Ultrasonic Non-Destructive Testing (NDT) Using Wireless Sensor Networks." Procedia Computer Science 10 (2012): 136–43. http://dx.doi.org/10.1016/j.procs.2012.06.021.

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Bettaeib, L., H. Kokabi, M. Poloujadoff, A. Sentz, and H. J. Krause. "Non destructive testing (NDT) with high Tc RF SQUIDs." Journal of Physics: Conference Series 97 (February 1, 2008): 012263. http://dx.doi.org/10.1088/1742-6596/97/1/012263.

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Qu, Zhi, Peng Jiang, and Weixu Zhang. "Development and Application of Infrared Thermography Non-Destructive Testing Techniques." Sensors 20, no. 14 (July 10, 2020): 3851. http://dx.doi.org/10.3390/s20143851.

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Effective testing of defects in various materials is an important guarantee to ensure its safety performance. Compared with traditional non-destructive testing (NDT) methods, infrared thermography is a new NDT technique which has developed rapidly in recent years. Its core technologies include thermal excitation and infrared image processing. In this paper, several main infrared thermography nondestructive testing techniques are reviewed. Through the analysis and comparison of the detection principle, technical characteristics and data processing methods of these testing methods, the development of the infrared thermography nondestructive testing technique is presented. Moreover, the application and development trend are summarized.

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Fernandes, Henrique, Jannik Summa, Julie Daudre, Ute Rabe, Jonas Fell, Stefano Sfarra, Gianfranco Gargiulo, and Hans-Georg Herrmann. "Characterization of Ancient Marquetry Using Different Non-Destructive Testing Techniques." Applied Sciences 11, no. 17 (August 28, 2021): 7979. http://dx.doi.org/10.3390/app11177979.

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Non-destructive testing of objects and structures is a valuable tool, especially in cultural heritage where the preservation of the inspected sample is of vital importance. In this paper, a decorative marquetry sample is inspected with three non-destructive testing (NDT) techniques: air-coupled ultrasound, X-ray micro-tomography, and infrared thermography. Results from the three techniques were compared and discussed. X-ray micro-tomography presented the most detailed results. On the other hand, infrared thermography provided interesting results with the advantage of being cheap and easy in the deployment of the NDT method.

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Sun, Yadong, and Shirong Ru. "Application of Non-Destructive Testing in Reservoir Dam Safety Monitoring." Environmental and Earth Sciences Research Journal 9, no. 3 (September 28, 2022): 98–103. http://dx.doi.org/10.18280/eesrj.090303.

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Most reservoirs built in earlier years in China generally have major safety issues and leakage is a common problem with them. Nowadays as the technology of Non-Destructive Testing (NDT) has developed and matured greatly, it has been widely used in detecting internal seepage channels, voids, cracks of the dam body and is showing obvious advantages in these aspects. This paper employed a method integrating geological radar (geo-radar) with ultrasonic detection to conduct safety test on the dam body of the Xidachuan Reservoir located in the Linjiang City of Jilin Province of China. The NDT discovered main leakage risk positions of the dam, gave a safety evaluation of the dam body, and proposed targeted treatment measures. NDT can quickly and accurately inspect the quality problems with the dam without causing damages to the structure and it can provide reliable guarantees for the quality of dam projects.

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Abdollahi-Mamoudan, Farima, Clemente Ibarra-Castanedo, and Xavier P. V. Maldague. "Advancements in and Research on Coplanar Capacitive Sensing Techniques for Non-Destructive Testing and Evaluation: A State-of-the-Art Review." Sensors 24, no. 15 (August 1, 2024): 4984. http://dx.doi.org/10.3390/s24154984.

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In contrast to conventional non-destructive testing (NDT) and non-destructive evaluation (NDE) methodologies, including radiography, ultrasound, and eddy current analysis, coplanar capacitive sensing technique emerges as a novel and promising avenue within the field. This paper endeavors to elucidate the efficacy of coplanar capacitive sensing, also referred to as capacitive imaging (CI), within the realm of NDT. Leveraging extant scholarly discourse, this review offers a comprehensive and methodical examination of the coplanar capacitive technique, encompassing its fundamental principles, factors influencing sensor efficacy, and diverse applications for defect identification across various NDT domains. Furthermore, this review deliberates on extant challenges and anticipates future trajectories for the technique. The manifold advantages inherent to coplanar capacitive sensing vis-à-vis traditional NDT methodologies not only afford its versatility in application but also underscore its potential for pioneering advancements in forthcoming applications.

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Bjelanović, Adriana, Tomislav Franković, and Ivana Štimac Grandić. "Effects of adjusting dynamic e-modulus to reference values of timber moisture and temperature in classification of small number of samples." Journal of the Croatian Association of Civil Engineers 71, no. 2 (March 13, 2019): 125–35. http://dx.doi.org/10.14256/jce.2498.2018.

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Mathematical dependences are derived for non-destructive testing (NDT) and destructive testing (DT) of three timber sets, each with six beams made of soft and hard structural timber. Very strong correlations were established between elastic moduli (e-moduli) determined by non-destructive testing, from dynamic ultrasound testing with direct propagation and static testing to bending action, and the correlation of e-moduli with bending strengths. The effects of adjustment of NDT results to reference values of moisture and temperature, and statistical significance of regression parameters, were evaluated from the standpoint of use in the initial classification of a small number of samples.

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Ruff, Daniel C., and Hans Eirich. "Non‐Destructive Testing of Bridge Cables using MIT." ce/papers 6, no. 3-4 (September 2023): 1043–48. http://dx.doi.org/10.1002/cepa.2628.

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AbstractThis article presents the importance of non‐destructive testing (NDT) in maintaining the safety and functionality of bridge cables, and focuses on the practical use of magnetic‐inductive testing (MIT) and ultrasonic testing (UT) for NDT of bridge cables in free length and in the area of the end connectors. MIT is a non‐invasive method that can effectively detect defects such as broken wires, corrosion symptoms, and other imperfections, making it a promising technique for inspecting and maintaining bridge cables. A research project investigated various types of magnetic induction testing on different tension members made of single wires and evaluated the advantages and limitations of the MIT method. The study also explored the impact of factors such as cable diameter and measurement speed on the effectiveness of the technique. The results suggest that the MIT method can accurately detect defects in bridge cables and provide valuable information for maintenance and repair purposes. However, the article highlights the need for further research to optimize the MIT technique, particularly in automating the detection and characterization of signals, and to expand its applicability to a wider range of cable diameters and conditions.

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Rucka, Magdalena. "Special Issue: “Non-Destructive Testing of Structures”." Materials 13, no. 21 (November 6, 2020): 4996. http://dx.doi.org/10.3390/ma13214996.

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The Special Issue “Non-Destructive Testing of Structures” has been proposed to present recent developments in the field of diagnostics of structural materials and components in civil and mechanical engineering. The papers highlighted in this editorial concern various aspects of non-invasive diagnostics, including such topics as condition assessments of civil and mechanical structures and connections of structural elements, the inspection of cultural heritage monuments, the testing of structural materials, structural health monitoring systems, the integration of non-destructive testing methods, advanced signal processing for the non-destructive testing of structures (NDT), damage detection and damage imaging, as well as modeling and numerical analyses for supporting structural health monitoring (SHM) systems.

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Van den Abeele, Filip, and Patrick Goes. "Non destructive testing techniques for risk based inspection." International Journal Sustainable Construction & Design 2, no. 2 (November 6, 2012): 161–71. http://dx.doi.org/10.21825/scad.v2i2.20512.

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Ensuring the safety of offshore structures is of vital importance for the reliability of oil and gas drilling rigs.Risk based inspection (RBI) is becoming an industry standard for management of equipment integrity. Theobjective of risk based inspection is to determine the likelihood of equipment failure (probability) and theconsequences of such an event. Combining the probability of an event with its possible consequencesallows determining the risk of an operation. Risk based inspection enables to optimize the frequency ofinspection, by moving from periodic inspection (based on arbitrary calendar dates) to an informedinspection program (based on equipment condition).One of the most important tools to determine the condition of the equipment, and to calculate its reliability,is the use of non destructive testing (NDT) techniques to detect cracks, flaws and defects. The probability ofdetection and the probability of sizing depend on the type of NDT method used. Combining NDTinformation on crack size and depth with fracture mechanics based damage models, allows predicting theremaining life time of a component.In this paper, the philosophy of risk based inspection is introduced and recent advances in non destructivetesting (in particular ultrasonic and electromagnetic techniques) are reviewed. Then, the use of fracturemechanics based damage models is demonstrated to predict fatigue failure for offshore structures.

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Oliveira, Thiago Luiz Lara, Maha Hadded, Saliha Mimouni, and Renata Brandelli Schaan. "The Role of Non-Destructive Testing of Composite Materials for Aerospace Applications." NDT 3, no. 1 (January 3, 2025): 3. https://doi.org/10.3390/ndt3010003.

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This review examines the essential application of non-destructive testing (NDT) techniques in assessing the integrity and damage of composite materials used in aerospace engineering, focusing on polymer matrix composites (PMCs), metal matrix composites (MMCs), and ceramic matrix composites (CMCs). As these materials increasingly replace traditional metallic and alloy components due to their advantageous properties, such as light weight, high strength, and corrosion resistance, ensuring their structural integrity becomes paramount. Here, various NDT techniques were described in detail, including ultrasonic, radiographic, and acoustic emission, among others, highlighting their significance in identifying and evaluating damages that are often invisible, yet critical, to parts safety. It stresses the need for innovation in NDT technologies to keep pace with the evolving complexity of composite materials and their applications. The review underscores the ongoing challenges and developments in NDT, advocating for enhanced techniques that provide accurate, reliable, and timely assessments to ensure the safety and durability of aerospace components. This comprehensive analysis not only illustrates current capabilities but also directs future research pathways for improving NDT methodologies in aerospace material engineering.

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Steinchen, W., L. Yang, G. Kupfer, and P. Mäckel. "Non-destructive testing of aerospace composite materials using digital shearography." Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering 212, no. 1 (January 1, 1998): 21–30. http://dx.doi.org/10.1243/0954410981532108.

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Digital shearography, a laser interferometry technique in conjunction with the digital imaging processing, has the potential for identifying defects both in small- and large-scale structures. This paper will focus on the recent development of digital shearography for non-destructive testing (NDT). With the improvement of the measuring methods and the development of a small and mobile measuring device in conjunction with a user-guided program, Shearwin, this laser inspection technique can be used easily in the environment of fieldwork. A few examples show its application in the aerospace industry for NDT of composites, e.g. GLARE panel, honeycomb structure and glass (or carbon)-fibre-reinforced plastics, etc.

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Misokefalou, Dr Eleni, Prof Michail Papoutsidakis, and Prof Georgios Priniotakis. "NON-DESTRUCTIVE TESTING FOR QUALITY CONTROL IN AUTOMOTIVE INDUSTRY." International Journal of Engineering Applied Sciences and Technology 7, no. 1 (May 1, 2022): 349–55. http://dx.doi.org/10.33564/ijeast.2022.v07i01.054.

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Due to the technological revolution, in order to withstand competition, giant production companies are obliged to provide customers with the most reliable and safe products in the shortest possible time while keeping the price of the product affordable to customers as well. To achieve this goal, the companies must undertake several complicated tasks, such as making complex dimensional measurements, detecting the defects, and repairing them before bringing the product to market. At that point the non-destructive testing (NDT) comes into play which is a very broad concept containing myriad of conventional and also state-of-the-art methodologies. In this paper, several techniques for NDT, such as X-ray imaging, acoustic emission, ultrasonic testing, infrared thermography, digital image correlation, terahertz testing, shearography will be investigated. Moreover, the principles, advantages and disadvantages and application areas of these techniques will be introduced, and specific examples will be described for some of the methods.

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Xu, Sai, Hanting Wang, Xin Liang, and Huazhong Lu. "Research Progress on Methods for Improving the Stability of Non-Destructive Testing of Agricultural Product Quality." Foods 13, no. 23 (December 4, 2024): 3917. https://doi.org/10.3390/foods13233917.

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Non-destructive testing (NDT) technology is pivotal in the quality assessment of agricultural products. In contrast to traditional manual testing, which is fraught with subjectivity, inefficiency, and the potential for sample damage, NDT technology has gained widespread application due to its advantages of objectivity, speed, and accuracy, and it has injected significant momentum into the intelligent development of the food industry and agriculture. Over the years, technological advancements have led to the development of NDT systems predicated on machine vision, spectral analysis, and bionic sensors. However, during practical application, these systems can be compromised by external environmental factors, the test samples themselves, or by the degradation and noise interference inherent in the testing equipment, leading to instability in the detection process. This instability severely impacts the accuracy and efficiency of the testing. Consequently, refining the detection methods and enhancing system stability have emerged as key focal points for research endeavors. This manuscript presents an overview of various prevalent non-destructive testing methodologies, summarizes how sample properties, external environments, and instrumentation factors affect the stability of testing in practical applications, organizes and analyzes solutions to enhance the stability of non-destructive testing of agricultural product quality based on current research, and offers recommendations for future investigations into the non-destructive testing technology of agricultural products.

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Mohammad, Iqbal Khan. "Non-Destructive Testing for Concrete: Dynamic Modulus and Ultrasonic Velocity Measurements." Advanced Materials Research 243-249 (May 2011): 165–69. http://dx.doi.org/10.4028/www.scientific.net/amr.243-249.165.

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Nondestructive testing (NDT) is a technique to determine the integrity of a material, component or structure. The commonly NDT methods used for the concrete are dynamic modulus of elasticity and ultrasonic pulse velocity. The dynamic modulus of elasticity of concrete is related to the structural stiffness and deformation process of concrete structures, and is highly sensitive to the cracking. The velocity of ultrasonic pulses travelling in a solid material depends on the density and elastic properties of that material. Non-destructive testing namely, dynamic modulus of elasticity and ultrasonic pulse velocity was measured for high strength concrete incorporating cementitious composites. Results of dynamic modulus of elasticity and ultrasonic pulse velocity are reported and their relationships with compressive strength are presented. It has been found that NDT is reasonably good and reliable tool to measure the property of concrete which also gives the fair indication of the compressive strength development.

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Research Fellow, HARDEV. "Industrial Radiography Testing & Technique (NDT)." INTERANTIONAL JOURNAL OF SCIENTIFIC RESEARCH IN ENGINEERING AND MANAGEMENT 08, no. 008 (August 22, 2024): 1–14. http://dx.doi.org/10.55041/ijsrem37132.

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This paper provides the recent advances and researches about non-destructive testing paper covers the review on the capabilities of NDT applications such as Visual Testing (VT), Ultrasonic Testing (UT), Radiographic Testing (RT), Electromagnetic Testing (ET), Acoustic Emission (AE) and Dye Penetrate testing( DPT) with respect to advantages and disadvantages of these methods. Further methods are classified on basis of their intrinsic characteristics and their applications. Mostly, an NDT evaluator uses only one non-destructive test method to perform the evaluation. If the scope of work is straight forward, using a single test method is acceptable. However, there are times when a single test method does not provide enough information about the material integrity And thereby combination of different methods is essential. Non destructive testing is widely applied in power plants, aerospace, nuclear industry, military and defiance, storage tank inspection, pipe and tube inspection and composite defects characterization. This paper mainly focuses on the scope of NDT application for composite materials The use of Industrial Radiography for examining the quality of Weld joints is very popular worldwide. In India, many welding activities like construction and laying the huge pipelines for gas and water transportation and distribution as well construction of storage tanks are performed. The objects are working under high pressure and therefore, it is important to produce the weld beads with high quality. Industrial radiography uses ionizing radiation to view objects in a way that cannot be seen otherwise. The method has grown out of engineering, and is a major element of Non destructive testing (NDT) to inspect materials for hidden flaws. The radiation caused by these facilities is very dangerous however, with the use of new technologies and proper protection, risks of injury and death associated with radiation can be greatly reduced. Radiographic Testing (RT) is widely used in industries, at airport for security checks, medical applications etc. to detect anomalies in materials and human bodies. Radiographic Testing is the common NDT methods used in the construction and fabrication industries for the oil & gas sectors using welding, gas/liquid transmission pipelines, casting foundries, and condition monitoring in existing oil & gas refineries and facilities. This paper will discuss radiographic testing sensitivity using industrial X-ray films mainly on welds and castings. No in-depth discussion in related science and physics, merely the perspective of an industrial radiographer based on his experience. Keywords: IQI, Quantitative, Qualitative, DIN- sensitivity, contrast, definition, geometric un-sharpness RT,UT MT DPT ET, NDT, TAEC,,AE ET SFD LOP ,LOF,UNDER FIL UNDER CUT.

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Journal articles on the topic 'Non-destructive testing (NDT)'

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