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Detection Method for Bolt Loosening and Washer Damage in Flange Assembly Structures Based on Phased Array Ultrasonics Res. Nondestruct. Eval. (IF 1.4) Pub Date : 2024-03-15 Fei Shang, Bo Sun, Hu Li, Honghui Zhang, Zhendong Liu, Xin Meng, Lei Jiang, Guang Xv
During the service life of flange assembly components, factors such as corrosion and vibration can lead to washer damage and loosening of fastening bolts, resulting in fluid leakage. Traditional in...
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Nondestructive Evaluation of Nylon/carbon-Fiber Additively Manufactured Components Using Rotational Eddy Current Testing Res. Nondestruct. Eval. (IF 1.4) Pub Date : 2024-03-08 Matthew Newton, J.C. Wilkins, T.J. Fleck, I. Gravagne
This work applies high-frequency rotational Eddy Current Testing (ECT) to characterize various material and manufacturing properties of fiber-filled fused filament fabrication (FFF) components. Usi...
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Dynamic Defect Detection in Fast, Robust NDE Methods by Transfer Learning Based Optimally Binned Hypothesis Tests Res. Nondestruct. Eval. (IF 1.4) Pub Date : 2024-02-28 Subrata Mukherjee, Lei Peng, Lalita Udpa, Yiming Deng
The structural integrity of safety-critical infrastructures diminishes over time, necessitating periodic inspections. The gathering of low-noise, precise nondestructive evaluation (NDE) readings fo...
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Excitation of Odd Harmonics of SH0 Mode Ultrasonic Guided Waves Using Magnetostriction-Based EMAT: Theoretical Modeling Res. Nondestruct. Eval. (IF 1.4) Pub Date : 2024-02-20 Yao Liu, Bin Wu, Jianwei Zhang, Cunfu He, Xiucheng Liu, Xiang Gao
Magnetostriction-based electromagnetic acoustic transducer (M-EMAT) is a promising tool for generating fundamental shear-horizontal (SH0) mode guided waves in plate. Though the M-EMAT possesses hig...
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Fast VGG: An Advanced Pre-Trained Deep Learning Framework for Multi-Layered Composite NDE via Multifrequency Near-Field Microwave Imaging Res. Nondestruct. Eval. (IF 1.4) Pub Date : 2024-02-20 Xuhui Huang, Lei Peng, Subrata Mukherjee, Ciaron Hamilton, Xiaodong Shi, Vijay Srinivasan, Eric Davis, Yiming Deng
Microwave nondestructive testing (NDT) techniques show promise for composite inspection due to microwave signals’ ability to penetrate and interact with internal structures. However, current microw...
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Evaluation of Defect Depth of X70 Pipeline Steel Based on the Piezomagnetic Signals Res. Nondestruct. Eval. (IF 1.4) Pub Date : 2024-01-17 Sheng Bao, Pengfei Jin
In this research, the correlation between the defect depth and the tangential piezomagnetic field of X70 steel was investigated. Tensile tests were carried out to measure the piezomagnetic fields o...
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Comparison of In-situ Nondestructive Testing and Ex-situ Methods in Additive Manufactured Specimens for Internal Feature Detection Res. Nondestruct. Eval. (IF 1.4) Pub Date : 2024-01-17 Youssef AbouelNour, Nikhil Gupta
The effectiveness and repeatability of Additive Manufacturing (AM) technologies has been often measured through rigorous testing, both in-situ and ex-situ. In-situ nondestructive testing (NDT) has ...
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Detection of Barely Visible Impact Damage in Composite Structures Using Backward Sweep Vibro-thermography Technique Utilizing Asymmetry in Local Defect Resonance Res. Nondestruct. Eval. (IF 1.4) Pub Date : 2024-01-17 Manish Sharma, Tanmoy Bose
In this article, local defect resonance-based vibrothermography has been studied for different sweep direction and ranges. Two different carbon fiber-reinforced polymer (CFRP) composite plate has b...
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Utilizing an Ultrasonic Inspection System Operating Inside an Autoclave and Machine Learning to Quantify Porosity within Composites During Cure Res. Nondestruct. Eval. (IF 1.4) Pub Date : 2023-11-13 Tyler B. Hudson, Gavin R. Chung, Joseph J. Pinakidis, Patrick J. Follis, Thammaia Sreekantamurthy, Frank L. Palmieri
Composite materials are increasingly being utilized in aerospace applications for their high stiffness and strength to weight ratios and fatigue resistance. However, defects in the composite may ar...
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Application of Reciprocity for Facilitation of Wave Field Visualization and Defect Detection Res. Nondestruct. Eval. (IF 1.4) Pub Date : 2023-10-12 Bernd Köhler, Kanta Takahashi, Kazuyuki Nakahata
The motion visualization in a structural component was studied for defect detection. Elastic motions were excited by hammer impacts at multiple points and received by an accelerometer at a fixed po...
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Hands-On Training of Non-destructive Testing Using a Mock-Up in the Curriculum of Civil Engineers Res. Nondestruct. Eval. (IF 1.4) Pub Date : 2023-10-12 Sylvia Kessler, Christian U. Grosse
Our infrastructure deteriorates progressively and the knowledge about the current condition is crucial to enable proper maintenance. Nondestructive techniques provide the basis for reliable conditi...
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Introduction Res. Nondestruct. Eval. (IF 1.4) Pub Date : 2023-09-19
Published in Research in Nondestructive Evaluation (Vol. 34, No. 3-4, 2023)
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Modeling of Eddy Current NDT Simulations by Kriging Surrogate Model Res. Nondestruct. Eval. (IF 1.4) Pub Date : 2023-09-04 Yang Bao
In this article, the Kriging surrogate model is proposed to accelerate the model-assisted probability of detection (MAPoD) analysis for eddy current nondestructive testing (NDT). The Kriging surrog...
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A Generalized Classification Framework with Simultaneous Feature Weighting and Selection Using Antlion Optimization Algorithm Res. Nondestruct. Eval. (IF 1.4) Pub Date : 2023-07-21 Manju Mohan, M.M. Ramya
The use of machine-learning based algorithms on a large-scale nondestructive evaluation (NDE) data considerably advances the NDE techniques toward complete industrial automation. In this article, s...
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Machine Learning for the Nondestructive Prediction of Neutral Temperature in Continuous Welded Rails Res. Nondestruct. Eval. (IF 1.4) Pub Date : 2023-07-19 Matthew Belding, Alireza Enshaeian, Charles Hager, Piervincenzo Rizzo
This paper describes the application of machine learning (ML) in the framework of a data-driven nondestructive evaluation (NDE) method to estimate the rail neutral temperature (RNT) of continuous w...
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Pulsed Eddy Current Testing Method for Corrosion Thinning Defects of Ferromagnetic Components Based on Parameter Inversion Algorithm Res. Nondestruct. Eval. (IF 1.4) Pub Date : 2023-07-13 Wensheng Yao, Yufeng Ye, Fenghuai Wang, Haoping Xie
Based on the time domain analytical expression of the pulsed eddy current field of a ferromagnetic flat plate, the least square parameter inversion problem between the measured value of the time-do...
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Quantitative Evaluation of Corrosion Defects on Structural Steel Plates via Metal Magnetic Memory Method Res. Nondestruct. Eval. (IF 1.4) Pub Date : 2023-06-15 Xinwei Liu, Sanqing Su, Wei Wang, Junting Li, Fuliang Zuo, Ruize Deng
The detection and evaluation of corrosion defects take on a critical significance to ensure the service safety of steel structures in civil engineering. The quantitative evaluation of corrosion def...
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Sum of Gaussian Feature-Based Symbolic Representations of Eddy Current Defect Signatures Res. Nondestruct. Eval. (IF 1.4) Pub Date : 2023-06-04 James Earnest
This study investigates a novel symbolic representation method based on Symbolic Aggregate Approximation (SAX) of time series that focuses on differential coil (D-coil) eddy current (EC) defect res...
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Assessment of Laser-Generated Ultrasonic Total Focusing Method for Battery Cell Foil Weld Inspection Res. Nondestruct. Eval. (IF 1.4) Pub Date : 2023-04-02 Dmitriy D. Bruder, Megan E. McGovern, Robin James, Teresa J. Rinker, Vineet Gattani
ABSTRACT The feasibility of using laser-generated ultrasonic Total Focusing Method (TFM) was assessed for guided ultrasonic waves in finite plates. The application under consideration is for inspection of ultrasonically welded battery tab-to-electrode foil stack joints. The testing constraints for this weld necessitate couplant-free, remote, guided-wave conditions making laser ultrasonic TFM an ideal
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Millimeter-Wave Near-Field Evaluations of Polylactic Acid (PLA) Filament Used in Polymer-Based Additive Manufacturing (AM) Res. Nondestruct. Eval. (IF 1.4) Pub Date : 2023-03-12 Farzaneh Ahmadi, Mohammad Tayeb Al Qaseer, Reza Zoughi
ABSTRACT Additive manufacturing (AM) remains to be a rapidly growing industry with applications that are extended beyond metals and to other materials, such as polymers, ceramics, and concrete, to name a few. However, advancement in the development of inspection techniques, particularly in-line nondestructive testing (NDT) methods, lags significantly. Most of the research in developing such methods
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Characteristics of Eddy Current Attenuation in Double-Layer Metallic Plate and Measurement of Gap Thickness Res. Nondestruct. Eval. (IF 1.4) Pub Date : 2023-03-12 Jing He, Zhiwei Zeng, Jiayi Li, Yanfei Liao, Chenhao Zhang
ABSTRACT Multilayer metallic plate is made by stacking homogeneous or heterogeneous metallic plates and connecting them with fasteners. The air-gap thickness between the adjacent layers affects the performance of the plate structure. The eddy current testing (ECT) technology has been used for the nondestructive testing of multilayer plate. However, the effect of air gap on the characteristics of eddy
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Millimeter Wave Thickness Evaluation of Thermal Barrier Coatings (TBCs) Using Open-Ended Waveguide Probes Res. Nondestruct. Eval. (IF 1.4) Pub Date : 2023-02-20 Anna Case, Mohammad Tayeb Al Qaseer, Reza Zoughi
ABSTRACT Nondestructive testing (NDT) of thermal barrier coatings (TBCs) is a critical and ongoing topic of research and development. In particular, inspection techniques that determine the thickness of ceramic topcoat and thermally grown oxide (TGO) are of interest. This work investigates the utility of open-ended rectangular waveguide probes in the millimeter wave frequency range of 26.5–110 GHz
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Numerical Study of Rayleigh Wave Interaction with Rolling Contact Fatigue Type of Defects Res. Nondestruct. Eval. (IF 1.4) Pub Date : 2023-02-20 Alex Vu, Yoganandh Madhuranthakam, Anish Poudel, S. K. Chakrapani
ABSTRACT Rolling Contact Fatigue or Damage (RCF/RCD) presents significant maintenance challenges to railroads across the globe. Quantifying RCF/RCD crack depths and density in rails is important for all railroads to manage their grinding programs effectively and efficiently and being able to conduct ultrasonic testing (UT) of rails for reliable detection of internal fatigue damage. This work focuses
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Identification of Corroded Cracks in Reinforced Concrete Based on Deep Learning SCNet Model Res. Nondestruct. Eval. (IF 1.4) Pub Date : 2023-02-15 Ying Xu, Xuelei Jiang, Tianrui Zhang, Gan Jin
ABSTRACT In order to improve the efficiency and accuracy of corroded cracks detection and classification in reinforced concrete, a corroded cracks identification model Steel Corrosion Net (SCNet), based on deep learning Convolutional Neural Network (CNN), is proposed. Crack figures are collected by self-shooting, internet search and corrosion test, then the data set of 39,000 pictures is built by data
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Shape Reconstruction of Columnar Structure Defect Res. Nondestruct. Eval. (IF 1.4) Pub Date : 2023-02-12 Gangfeng Zheng, Hao Dong, Ze Li, Songfeng Liu, Bin Wu, Cunfu He
ABSTRACT In this study, a cylindrical test specimen with a 3D through-hole defect was processed, and the reflected echo data of the defect at different cross-sections were obtained by an ultrasonic testing detection system. On this basis, two data processing methods were designed to obtain two types of 3D reconstruction images of defects, and the reconstruction effects of two methods were compared
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Ultrasonic Nondestructive Evaluation of Additively Manufactured Photopolymers Res. Nondestruct. Eval. (IF 1.4) Pub Date : 2023-01-04 Luz D. Sotelo, Amelia O. Vignola, Celeste A. Brown, Kaushik Sampath, Matthew D. Guild
ABSTRACT Advanced applications of polymer additive manufacturing (AM) require knowledge of the material acoustic and complex elastic properties. Recently, ultrasound nondestructive evaluation (NDE) methods have been applied to the understanding of AM polymers manufactured with a variety of methods. Nonetheless, the available information is still limited to a few materials and frequency ranges, and
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Effective Elastic Stiffness Tensor and Ultrasonic Velocities for 3D Printed Polycrystals with Pores and Texture Res. Nondestruct. Eval. (IF 1.4) Pub Date : 2022-12-09 Ruohan Tan, Yongfeng Song, Xiongbing Li, Shu Cheng, Peijun Ni
ABSTRACT This paper focuses on the micromechanical modeling of pores and texture in 3D-printed polycrystals. A Gaussian-shape approximation is used to describe the orientation distribution function (ODF) and construct the initial homogenization model of the representative volume element (RVE). Spherical and ellipsoidal pores of varying sizes are added in stages to the RVE for homogenization, utilizing
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In-Motion Railroad Tie Deflection Measurement via Ultrasonic Airborne Sonar and Computer Vision Techniques Res. Nondestruct. Eval. (IF 1.4) Pub Date : 2022-11-03 Ali Zare Hosseinzadeh, Diptojit Datta, Francesco Lanza di Scalea
ABSTRACT It is known in the railroad maintenance engineering community that the deflection of railroad ties is an indicator of the quality of the tie–ballast interface, whose deterioration may cause dangerous train derailments. A new technology is proposed to reconstruct the full-field deflection profile of railroad ties in-motion by means of non-contact ultrasonic testing and computer vision techniques
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Time Multiplexing of Currents for Magnetic Particle Inspection Res. Nondestruct. Eval. (IF 1.4) Pub Date : 2022-10-25 Pavel Staněk, Zbyněk Škvor
ABSTRACT This article concerns magnetization methods for detecting arbitrary oriented defects by magnetic particle inspection. The authors propose a new method of magnetization with omnidirectional detection ability requiring only a single-channel DC or AC power supply. The detection of all defects by the new method can be achieved during a single testing (spraying) cycle.
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In-situ Laser ultrasound-based Rayleigh Wave Process Monitoring of DED-AM Metals Res. Nondestruct. Eval. (IF 1.4) Pub Date : 2022-09-09 C. Bakre, T. Meyer, C. Jamieson, A. R. Nassar, E. W. Reutzel, C. J. Lissenden
ABSTRACT A laser ultrasound system is integrated into a directed energy deposition additive manufacturing (DED-AM) chamber to use Rayleigh waves for process monitoring in a noncontact layer-by-layer mode. Layers of Ti-6Al-4 V are deposited and then interrogated with ultrasonic Rayleigh waves that are sensitive to flaws and material nonuniformities. The novel integrated material processing and monitoring
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Quantitative Analysis of Aeroengine Turbine Disk Surface Crack under Natural Magnetic Field Res. Nondestruct. Eval. (IF 1.4) Pub Date : 2022-08-01 Ping Fu, Bo Hu, Weitao Luo, Shaofei Wang, Xiwang Lan
ABSTRACT Aiming at surface cracks of aeroengine turbine disk, a weak magnetic detection technology without excitation is proposed. Signal processing is performed using blind source separation (BSS). Support vector machine (SVM) is used to realize quantitative evaluation. Four nickel-base superalloy test blocks with defects are designed. The magnetic induction intensity of the test block is collected
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Toward In-situ Characterization of Additively Manufactured Parts Using Nonlinear Resonance Ultrasonic Spectroscopy Res. Nondestruct. Eval. (IF 1.4) Pub Date : 2022-08-01 Prabhakaran Manogharan, Jacques Rivière, Parisa Shokouhi
ABSTRACT In this study, we investigate the feasibility of using nonlinear resonance ultrasound spectroscopy (NRUS) for in-situ monitoring of additively manufactured (AM) parts i.e., while they are still on the build plate. In NRUS, the test specimen is excited around one or more of its resonance frequencies with increasing driving amplitude. The linear shift in resonance frequency with the increasing
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Numerical and Experimental Study of the Effect of the Evolution of Matrix Cracks in Composites on the Nonlinear Ultrasound Response Res. Nondestruct. Eval. (IF 1.4) Pub Date : 2022-07-15 Wei Li, Rongxin Sun, Peng Jiang, Feng Yang, Yinghonglin Liu, Chang Yang
ABSTRACT Early-onset damage in composite materials consists matrix cracking with certain regularity in distribution. However, the effect of the spatial arrangement of matrix cracks and the relationship between the direction of expansion of the cracks and the incident direction of ultrasound waves on the nonlinear parameter in nonlinear ultrasound detection is poorly understood. This study analyzes
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Correction Res. Nondestruct. Eval. (IF 1.4) Pub Date : 2022-07-13
Published in Research in Nondestructive Evaluation (Vol. 33, No. 2, 2022)
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Concrete Microcracks Detection under Compressive Load Based on Nonlinear Ultrasonics Modulation with Broadband Excitation Res. Nondestruct. Eval. (IF 1.4) Pub Date : 2022-06-27 Qingyuan Wang, Ying Xu, Chengyin Liu
ABSTRACT The initiation and propagation of microcrack damage in concrete under compressive load have a great influence on structures that require high durability. This paper theoretically analyzed the nonlinear acoustic modulation mechanism in concrete at the initial stage of compressive cracking and explored the relationship between microcrack density and nonlinear response variation. Nonlinear behavior
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Detection and Classification of Corrosion-related Damage Using Solitary Waves Res. Nondestruct. Eval. (IF 1.4) Pub Date : 2022-06-15 Hoda Jalali, Ritesh Misra, Samuel J. Dickerson, Piervincenzo Rizzo
ABSTRACT This paper presents an inspection technique based on highly nonlinear solitary waves, wireless transducers, and machine learning. The technique was demonstrated on a plate subjected to accelerated corrosion while monitored with wired and wireless transducers, designed and assembled in laboratory. The tethered device consisted of a chain of spheres surmounted by a solenoid wired to and driven
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Development of Scanning Acoustic Microscopy System for Evaluating the Resistance Spot Welding Quality Res. Nondestruct. Eval. (IF 1.4) Pub Date : 2022-05-31 Van Hiep Pham, Tan Hung Vo, Dinh Dat Vu, Jaeyeop Choi, Sumin Park, Doan Thong Nguyen, Byeong-Il Lee, Junghwan Oh
ABSTRACT Scanning acoustic microscopy (SAM) system (TSAM-400) was designed and developed for evaluating the quality of resistance spot welding (RSW) joints of 1.5 mm-thick SUS 316 stainless steel sheets under different welding parameters. Indentation and nugget information (diameter and shape) were used for evaluating the RSW quality. SAM A-scan signals were used to calculate the indentation. The nugget
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Guest Associate Technical Editor Letter Res. Nondestruct. Eval. (IF 1.4) Pub Date : 2022-05-19 Marc Kreutzbruck
(2022). Guest Associate Technical Editor Letter. Research in Nondestructive Evaluation: Vol. 33, No. 1, pp. 1-3.
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Nondestructive Testing of Thin Composite Structures for Subsurface Defects Detection Using Dynamic Laser Speckles Res. Nondestruct. Eval. (IF 1.4) Pub Date : 2022-03-17 Zinoviy T. Nazarchuk, Leonid I. Muravsky, Oleksandr G. Kuts
ABSTRACT A novel nondestructive testing method for subsurface defects detection in thin composite structures using dynamic laser speckles is proposed. In this method, a laminated composite panel containing a subsurface defect is excited by a frequency scanned ultrasonic (US) wave and is illuminated by an expanded laser beam. If one of resonant frequencies of the defect coincides with the US frequency
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Influence of Core and Shield of Coil on Skin Depth in Eddy Current Testing Res. Nondestruct. Eval. (IF 1.4) Pub Date : 2022-03-14 Maosen Chen, Yanfei Liao, Zhiwei Zeng, Junming Lin, Yonghong Dai
ABSTRACT In eddy current (EC) nondestructive testing, coil is usually wound on core or covered by shield to improve the sensitivity of defect detection and ability of anti-interference of the probe. However, when core or shield is used, the magnetic field will be redistributed, resulting in a change in the speed of EC attenuation in the depth direction. The purpose of this paper is to reveal the influence
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Qualitative analysis of a 3D multiphysics model for nonlinear ultrasonics and vibration induced heating at closed defects Res. Nondestruct. Eval. (IF 1.4) Pub Date : 2022-03-14 Kevin Truyaert, Vladislav Aleshin, Koen Van Den Abeele
ABSTRACT Upon exciting a material using elastic waves, the locally induced deformation at the interfaces of internally closed defects may cause nonlinear wave mechanics and dynamics in the form of clapping and friction. As a result, both phenomena instigate spectral broadening of the excitation spectrum as well as the production of heat, directly originating from the defect. To better understand and
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Hybrid Method of ACA and Interpolation-based Algorithms for Analysis of Eddy Current Nondestructive Evaluations Res. Nondestruct. Eval. (IF 1.4) Pub Date : 2021-11-27 Yang Bao, Zhiwei Liu, Jiming Song
ABSTRACT In this article, the hybridization of adaptive cross approximation (ACA) algorithm and interpolation-based separation of the kernel function is proposed to accelerate solving the matrix equations resulted in the boundary element method (BEM) for 3D arbitrary-shaped eddy current nondestructive evaluation problems. The hybrid method combines the advantages of both the ACA algorithm and the interpolation-based
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The Effect of Cyclic Preloading on the Magnetic Behavior of the Hot-rolled 08G2B Steel under Elastic Uniaxial Tension Res. Nondestruct. Eval. (IF 1.4) Pub Date : 2021-11-17 E.S. Gorkunov, A.M. Povolotskaya, S.M. Zadvorkin, E.A. Putilova, A.N. Mushnikov
ABSTRACT In order to develop methods for diagnosing the stress-strain state of steel products in view of their history in the form of cyclic loading we study the effect of previous zero-to-tension cyclic loading on the magnetic behavior of the 08G2B steel under subsequent static elastic tension along the same direction. Magnetic measurements were made both in a closed magnetic circuit and by means
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Nonlinear Eddy Current Technique for Fatigue Detection and Classification in Martensitic Stainless-Steel Samples Res. Nondestruct. Eval. (IF 1.4) Pub Date : 2021-12-23 Bharath Basti Shenoy, Zi Li, Lalita Udpa, Satish Udpa, Yiming Deng, Vivek Rathod, Thiago Seuaciuc-Osorio
ABSTRACT The increasing use of stainless steel in industrial structures can be attributed to its excellent mechanical properties at elevated temperatures. Martensitic grade stainless-steel is used, for example, to manufacture steam turbine blades in power plants. The failure of these turbine blades can result in equipment damage contributing to expensive plant failures and safety concerns. Degradation
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Three-Dimensional Reconstruction of Complex Defects in Thin Steel Strips with the Imaging Method of Magnetic Field Distortion Res. Nondestruct. Eval. (IF 1.4) Pub Date : 2022-01-04 Hengtao Li, Xiucheng Liu, Jiaying Zhang, Chang Wang, Bin Wu, Cunfu He
ABSTRACT In the study, the three-dimensional (3D) morphology of defects in thin steel strips with a thickness of 0.8 mm was determined with the imaging method of magnetic field distortion (MFD). First, MFD imaging of through-wall defects and wall-thinning defects in the samples collected from inline products was performed in our laboratory. The actual profiles of the defects were measured with a digital
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Materials strength and acoustic nonlinearity: case study of CFRP Res. Nondestruct. Eval. (IF 1.4) Pub Date : 2021-12-28 Julian Ehrler, Alexander Solodov, Marc Kreutzbruck
ABSTRACT Nonlinear acoustic approach is assessed as a nondestructive tool for reconstructing stress-strain curves and quantifying the ultimate tensile strength for various orientations of composite materials. It is shown that a direct use of nonlinear acoustic data requires some adjustments to be applied in the quasi-static tensile conditions. The approach is validated by the calculations using the
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Nonlinear Resonant Ultrasonic Spectroscopy (NRUS) for Monitoring Fatigue Crack Growth in Aluminum Res. Nondestruct. Eval. (IF 1.4) Pub Date : 2021-12-27 Jiang Jin, Parisa Shokouhi
ABSTRACT Nonlinear resonant ultrasonic spectroscopy (NRUS) is a resonance-based acoustic testing technique that yields the hysteretic elastic nonlinearity parameter by measuring the resonance frequency shift with increasing driving amplitude. NRUS offers great potential for nondestructive evaluation since it is relatively simple to implement and can detect incipient damage thanks to the high sensitivity
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Damage Detection of Cross-Plied CFRP Laminates Based on Rectangular Differential Pulse Eddy Current Sensors Res. Nondestruct. Eval. (IF 1.4) Pub Date : 2021-10-19 Wenru Fan, Haotian Zhang
ABSTRACT Carbon fiber reinforced polymer (CFRP) laminates are extensively used in aviation due to their excellent material properties. Damages resulted from manufacturing or usage seriously undermine the safety of aircraft structures. Therefore, the efficient detection of the damage in CFRP laminates is important. In this paper, three kinds of common damages including impact damage, crack damage and
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Acoustic Properties of Steel Bridge Base Metals Res. Nondestruct. Eval. (IF 1.4) Pub Date : 2021-11-06 Curtis J. Schroeder, Robert J. Conner, Bridget M. Crowley, Glenn A. Washer
ABSTRACT Ultrasonic testing (UT) is typically conducted to locate and classify (or rate) defects in welds during bridge fabrication. Variations in acoustic properties such as attenuation and velocity can have an impact on the UT results. Defects in welds may be missed, incorrectly rated, or incorrectly located, and false calls may occur that require unnecessary repairs. The objective of the research
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Editor’s Letter Res. Nondestruct. Eval. (IF 1.4) Pub Date : 2021-08-24
(2021). Editor’s Letter. Research in Nondestructive Evaluation: Vol. 32, No. 5, pp. 191-191.
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Guided Wave Studies for Enhanced Acoustic Emission Inspection Res. Nondestruct. Eval. (IF 1.4) Pub Date : 2021-08-19 Joseph L. Rose
ABSTRACT Fundamental elements of wave mechanics are covered with respect to Acoustic Emission (AE) analysis in Nondestructive Evaluation (NDE) and Structural Health monitoring (SHM). Emphasis is placed on aspects of Ultrasonic Guided Waves that travel in a structure due to elastic wave emissions from a defect source as defects continue to grow. The AE Method is based on the emission of elastic waves
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Evaluation of Stress and Stress Concentration Degree Based on the Online Piezomagnetic Measurement Res. Nondestruct. Eval. (IF 1.4) Pub Date : 2021-08-07 Sheng Bao, Qiang Luo, Zhengye Zhao, Yibin Gu
ABSTRACT The goal of this research is to correlate the piezomagnetic field with the stress and the stress concentration degree of ferromagnetic steels. Specimens of X80 steels were machined into smooth plates with circular holes in the center and tensile tests were carried out to detect the online piezomagnetic field on the surface of defective specimens. The relationship between the distribution of
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Computation and Storage Efficient Sparse MART Algorithm for 2-D, 3-D Reconstruction from Fan Beam, Cone-Beam Projection Data Res. Nondestruct. Eval. (IF 1.4) Pub Date : 2021-06-19 Sudhir Kumar Chaudhary, Prabhat Munshi
ABSTRACT Algebraic reconstruction algorithms are a better choice compared to transform-based algorithms whenever projection data is limited in nature. High computational cost and huge memory requirements are two major downsides of iterative reconstruction methods. Among all algebraic techniques, the Multiplicative Algebraic Reconstruction Technique (MART) is most popular because it maximizes the entropy
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A Neural Network System for Fault Prediction in Pipelines by Acoustic Emission Techniques Res. Nondestruct. Eval. (IF 1.4) Pub Date : 2021-06-08 Francesco Noseda, Luiza Ribeiro Marnet, Carlos Carlim, Luiz Rennó Costa, Natanael de Moura Junior, Luiz Pereira Calôba, Sérgio Damasceno Soares, Thomas Clarke, Ricardo Callegari Jacques
ABSTRACT The problem of evaluating the risk of failure associated with the propagation of a crack in a pipe under pressure has great practical relevance, and it may be tackled with acoustic-emission techniques. Artificial neural networks may be trained to classify the acoustic emissions generated by the crack according to the phase of propagation, and such a classification permits to evaluate the risk
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Baseline-Free Damage Identification Method for Lattice Sandwich Structures Based on Operational Deflection Shapes Res. Nondestruct. Eval. (IF 1.4) Pub Date : 2021-07-27
ABSTRACT A novel baseline-free damage identification method based on high frequency operational deflection shapes (ODSs) is presented for debonding detection in lattice sandwich structures (LSSs). Two numerical models with different unit cells are constructed to analyze the vibration characteristics of a structure with debonded defect in the high-frequency band. The mode shapes and ODSs are computed
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In Situ Measurement of Concrete Static Modulus of Elasticity: Proof of Concept Implementation Res. Nondestruct. Eval. (IF 1.4) Pub Date : 2021-07-24
ABSTRACT This paper reports a laboratory implementation of a prototype sensor for the measurement of in situ concrete static modulus of elasticity. Sensor measurements for a trial concrete mixture were generated, post-processed, and calibrated to best match companion ASTM C469 modulus of elasticity testing performed on the same mixture for concrete ages up to 28 days. The sensor prototype measurements
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Characteristics of Eddy Current Attenuation in Metal Clad Plates and Measurement of Cladding Thickness Res. Nondestruct. Eval. (IF 1.4) Pub Date : 2021-07-27
ABSTRACT A metal clad plate consists of a base layer and a clad layer of different materials. When testing clad plate using the eddy current (EC) method, the variation of EC density along the thickness direction in clad plate is complicated owing to the interface between the layers. This article attempts to investigate the characteristics of the variation of EC density in the thickness direction in
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Limitations of Sonic Echo Testing on Buried Piles of Unknown Bridge Foundations Res. Nondestruct. Eval. (IF 1.4) Pub Date : 2021-02-15 Saman Rashidyan, Tang-Tat Ng, Arup Maji
ABSTRACT Nondestructive Sonic Echo (SE) field tests have shown that this method does not have a satisfactory performance in determining the depth of piles fully buried underneath pile caps. In the current study, we endeavored to investigate the possibility of improving SE methodology to obtain interpretable results leading to determining the depth of buried piles in such foundations. The results obtained
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A Detection Sensitivity Analysis Model for Structural Health Monitoring to Inspect Wall Thinning considering Random Sensor Location Res. Nondestruct. Eval. (IF 1.4) Pub Date : 2021-02-16 Haicheng Song, Noritaka Yusa
ABSTRACT Structural health monitoring (SHM), which allows the detection of defects at an early stage by attaching sensors to the target, is an effective method of enhancing the reliability and the safety of important engineering structures. One of the practical difficulties of SHM is that usually a large area must be monitored using a limited number of sensors fixed at certain locations. And the sensor
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Mechanical Sensing Properties of Embedded Smart Piezoelectric Sensor for Structural Health Monitoring of Concrete Res. Nondestruct. Eval. (IF 1.4) Pub Date : 2021-03-02 Fei Sha, Dongyu Xu, Xin Cheng, Shifeng Huang
ABSTRACT An embedded smart piezoelectric sensor was fabricated, and the encapsulation material was prepared with cement, epoxy resin, curing agent, and improvement additives. Structural health monitoring (SHM) methods based on dynamic stress-sensing capability of piezoelectric sensor were presented. Mechanical Testing & Simulation (MTS) amplitude-scanning and frequency-scanning dynamic loadings were