[PDF] Top 20 A Flaw Sizing Method Using the Zeroes in the Ultrasonic Scattering Amplitude
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A Flaw Sizing Method Using the Zeroes in the Ultrasonic Scattering Amplitude
... It is observed that, for a wide class of flaws, the wavenumbers or frequencies at which the real and imaginary parts of the scattering amplitude go through zer[r] ... See full document
12
A spectral method for sizing cracks using ultrasonic arrays
... ABSTRACT Ultrasonic phased array systems are becoming increasingly popular as tools for the inspection of safety-critical structures within the non-destructive evaluation ...algorithms, sizing flaws which ... See full document
19
A spectral method for sizing cracks using ultrasonic arrays
... ABSTRACT Ultrasonic phased array systems are becoming increasingly popular as tools for the inspection of safety-critical structures within the non-destructive evaluation ...algorithms, sizing flaws which ... See full document
20
Equivalent flaw time-of-flight diffraction sizing with ultrasonic phased arrays
... diffraction sizing (TOFD) was developed in the 1970s and is widely used to estimate crack lengths in ...TOFD method is done in a pitch-catch arrangement using single element ...TOFD sizing, ... See full document
9
Simulation of Scattering Acoustic Field in Rod and Identify of Ultrasonic Flaw Detecting Signal
... A method of acoustic field simulating was proposed, in this paper, the authors simulated the scattering acoustic field generated by impulsive line source in a glass rod, and compared the results with the ... See full document
9
Quantitative flaw characterization with ultrasonic phased arrays
... an ultrasonic inspection is to use the measured voltage from the receiving transducer to infer what types of scattering features are present in the test ...A-scans. Using the information contained in ... See full document
66
A Maximum Eigenvalue Approximation for Crack-Sizing Using Ultrasonic Arrays
... introduced using such empirical imaging techniques as they rely on arbitraily chosen imaging thresholds at which the defect measurements are ...made using time-frequency domain scattering ...based ... See full document
50
An analytical approach to objectively sizing cracks using ultrasonic phased array data
... domain scattering matrix. These scattering matrices can be easily extracted from experimental data if the location of the flaw is known a priori and so the method has been developed ... See full document
11
A model-based approach to crack sizing with ultrasonic arrays
... the scattering matrix and the crack size, an ana- lytical expression for the crack length is reached via the Born ...the method and it is thus shown that the formula holds for subwavelength ...the ... See full document
12
A model-based approach to crack sizing with ultrasonic arrays
... the method is reliant on the approximation of the roots (or local minima) of the pulse-echo ...a flaw embedded in a perfectly homogeneous host material, but if the material is heterogeneous then a different ... See full document
13
Model-based ultrasonic flaw classification and sizing
... The third part discusses the use of an adaptive neural network model for solving ultrasonic crack sizing problems.. This last paper will be submitted to Communications in NDE.[r] ... See full document
172
Ultrasonic Equivalent Flaw Sizing - A Time-of-Flight Approach
... Specifically, we consider a time-of-flight equivalent (TOFE) sizing method that can size relatively large flaws by locating the zero-of-time with respect to the tr[r] ... See full document
6
Flaw Characterization and Sizing Using Sensitivity Analysis and the Boundary Element Method
... The objective is to minimize the response function (; with respect to the ellipse variables Xc, Yc, a, b, and Q. This ensures that the experimental and computed response is [r] ... See full document
6
An Examination of the Application of Wiener Filtering to Ultrasonic Scattering Amplitude Estimation
... formation to be accompanied by a change in the material properties imme- diately adjacent to the flaw. The second step in estimating E[n2] involves measuring backs[r] ... See full document
9
Ultrasonic flaw detection
... Ultrasonic flaw detection Wayne Buchar Follow this and additional works at: http://scholarworks.rit.edu/theses This Thesis is brought to you for free and open access by the Thesis/Dissertation Collections ... See full document
70
Progress on Ultrasonic Flaw Sizing in Turbine Engine Rotor Components: Bore and Web Geometries
... [4,5]. The two particular parts of the jet engine which are considered are the turbine rotor component bore and web. Our goal is the development of inverse scatt[r] ... See full document
32
An A Priori Knowledge Based Wiener Filtering Approach to Ultrasonic Scattering Amplitude Estimation
... This figure shows that even for the case of low frequency noise, the statist i cal filter is successful in estimating the scattering amplitude to zero frequency [r] ... See full document
7
Ultrasonic Flaw Classification Using a Quasi-Pulse-Echo Technique
... In this work, we present a practical way to use mode-converted diffracted wave features in a near pulse-echo configuration to classify the local defect geometry as either crack-like or[r] ... See full document
6
Characterization of Flaw Shape and Orientation Using Ultrasonic Angular Scans
... host material; but, for a given flaw, it is simply a constant multiplicative factor.) Based on this, one would expect that flaw shape and orientation informat io[r] ... See full document
10
Modeling the Effects of Beam Size and Flaw Morphology on Ultrasonic Pulse/Echo Sizing of Delaminations in Carbon Composites
... an ultrasonic pulse/echo ...on sizing when the delamination is non -planar or partially transmitting in certain ...model using paraxial beam expansions and Kirchhoff and phase-screen approximations; ... See full document
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