Now showing items 61-80 of 219
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Automated Wall Thickness Evaluation for Turbine Blades Using Robot-Guided Ultrasonic Array Imaging
(The American Society of Mechanical Engineers (ASME), 2024)Nondestructive testing has become an essential part of the maintenance of modern gas turbine blades and vanes since it provides an increase in both safety against critical failure and efficiency of operation. Targeted ... -
Guided Wave-Based Early-Stage Debonding Detection and Assessment in Stiffened Panel Using Machine Learning With Deep Auto-Encoded Features
(The American Society of Mechanical Engineers (ASME), 2024)Debonding between stiffener and base plate is a very common type of damage in stiffened panels. Numerous efforts have been made for debonding assessment in the stiffened panel structure using guided wave-based techniques. ... -
Identification of Bearing Clearance in Sugar Centrifuge Using Dimension Theory and Support Vector Machine on Vibration Measurement
(The American Society of Mechanical Engineers (ASME), 2024)Bearing fatigue life is significantly influenced by bearing clearance. Vibration monitoring of bearing clearance deviations can efficiently reveal bearing wear and give sufficient lead time for maintenance. This study ... -
Enhancement of Contact Acoustic Nonlinearity Effect in a Concrete Beam Using Ambient Vibrations
(The American Society of Mechanical Engineers (ASME), 2024)Contact acoustic nonlinearity (CAN) is generated when oscillating crack faces open and close while a wave passes through it. However, reliably assessing the nonlinear effect due to micro-scale defects is challenging, ... -
Artificial Intelligence-Enabled Crack Length Estimation From Acoustic Emission Signal Signatures
(The American Society of Mechanical Engineers (ASME), 2023)This article addresses the classification of fatigue crack length using artificial intelligence (AI) applied to acoustic emission (AE) signals. The AE signals were collected during fatigue testing of two specimen types. ... -
Diagnostics of Concrete Box Beam Bridges Using Wireless Sensors and Finite Element Analysis
(The American Society of Mechanical Engineers (ASME), 2023)Three pretensioned adjacent concrete box beam bridges were studied with a structural health monitoring (SHM) paradigm based on strain measurements and finite element static analyses. An accurate model for one bridge and ... -
Deep Learning–Based Time-Series Classification for Robotic Inspection of Pipe Condition Using Non-Contact Ultrasonic Testing
(The American Society of Mechanical Engineers (ASME), 2023)This journal paper explores the application of Deep Learning (DL)-based Time-Series Classification (TSC) algorithms in ultrasonic testing for pipeline inspection. The utility of Electromagnetic Acoustic Transducers (EMAT) ... -
Nonlinear Beamforming Based on Amplitude Coherence Applied to Ultrasonic Imaging of Coarse-Grained Steels
(The American Society of Mechanical Engineers (ASME), 2/28/2023 )This paper deals with ultrasonic imaging in a nondestructive evaluation (NDE) context. In particular, we are focused on the inspection of coarse-grained steels having a heterogeneous composition that creates structural ... -
Incipient Fault Point Detection Based on Multiscale Diversity Entropy
(The American Society of Mechanical Engineers (ASME), 6/13/2023 )If the incipient fault (IF) point is not corrected, it may imply a poor prognostic framework, a false value of remaining useful life (RUL), and unexpected catastrophic failure. The use of the concept of multiscale diversity ... -
Unbalance Bearing Fault Identification Using Highly Accurate Hilbert–Huang Transform Approach
(The American Society of Mechanical Engineers (ASME), 7/26/2023 )The dynamic characteristics of rolling element bearings are strongly related to their geometric and operating parameters, most importantly the bearing unbalance. Modern condition monitoring necessitates the use of intrinsic ... -
Monitoring Elastoplastic Deformation in Ductile Metallic Materials Using Sideband Peak Count-Index Technique
(The American Society of Mechanical Engineers (ASME), 7/24/2023 )Ductile metallic materials such as aluminum alloy, brass, and steel are widely used in engineering structures. Monitoring elastoplastic deformation in these materials is important for structural health monitoring (SHM) to ... -
Evaluation of Early-Stage Fatigue Damage in Metal Plates Using Quasi-Static Components of Low-Frequency Lamb Waves
(The American Society of Mechanical Engineers (ASME), 6/13/2023 )Nonlinear Lamb waves including second harmonic and acoustic-radiation-induced quasi-static components (QSC) have a potential for accurately evaluating early-stage fatigue damage. Most previous studies focus on second-har ... -
Deep Learning-Based Denoising of Acoustic Images Generated With Point Contact Method
(The American Society of Mechanical Engineers (ASME), 5/29/2023 )The versatile nature of ultrasound imaging finds applications in various fields. A point contact excitation and detection method is generally used for visualizing the acoustic waves in Lead Zirconate Titanate (PZT) ceramics. ... -
Leveraging Full-Field Deformation Measurements in Computational Modeling of Damage
(The American Society of Mechanical Engineers (ASME), 5/17/2023 )Advances in sensing and nondestructive evaluation methods have increased the interest in developing data-driven modeling and associated computational workflows for model-updating, in relation also to a variety of emerging ... -
Fault Diagnostics and Faulty Pattern Analysis of High-Speed Roller Bearings Using Deep Convolutional Neural Network
(The American Society of Mechanical Engineers (ASME), 5/12/2023 )In this article, vibration-based fault diagnostics and response classification have been done for defective high-speed cylindrical bearing operating under unbalance rotor conditions. An experimental study has been performed ... -
Contactless Evaluation of Stress in Anisotropic Metallic Plates Using Nonlinear Electromagnetic Acoustic Resonance Technique
(The American Society of Mechanical Engineers (ASME), 4/17/2023 )In this paper, a contactless nonlinear acoustic method is developed for the evaluation of stress states in anisotropic metallic plates by a combination of electromagnetic acoustic resonance (EMAR) technique and higher ... -
Comprehensive Correlations for Small Punch Test Response Post-Processing Toward Preserved Mechanical Strength Estimation
(The American Society of Mechanical Engineers (ASME), 3/31/2023 )The small punch test (SPT) approach is a miniature specimen testing technique to estimate the preserved mechanical strength of an in-service component to check its fitness for service. The SPT results are summarized in ... -
Spindle Condition Monitoring With a Smart Vibration Sensor and an Optimized Deep Neural Network
(The American Society of Mechanical Engineers (ASME), 1/31/2023 )This article presents a spindle condition monitoring methodology using a low-power smart vibration sensor and a near real-time deep neural network (DNN) classifier. The most frequent spindle failures, such as imbalance, ... -
Log Grading and Knot Identification by Oblique X-Ray Scanning
(The American Society of Mechanical Engineers (ASME), 12/12/2022)The presence and location of knots within cut lumber substantially controls the physical properties and commercial value of the material. Thus, there is great practical interest in developing ways of choosing the cutting ... -
Detection and Characterization of Fatigue Cracks in Butt Welds of Offshore Structures Using the Eddy Current Method
(The American Society of Mechanical Engineers (ASME), 12/12/2022)A reliable assessment of the actual condition of wind turbines is essential for their continuous operation, or if an extension of their service life is considered. To be able to make valid statements about the condition ...