Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 100 for “"Nondestructive testing"”.
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Nondestructive Testing of Flexible Pavements
Made available in DSpace on 2014-12-13T19:31:53Z (GMT). No. of bitstreams: 1 7915436.pdf: 6807537 bytes, checksum: b36e1dff498563023bf3d71d83234b9e (MD5) Previous issue date: 1979
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Fluidic ultrasound generation for nondestructive testing
Ultrasonic testing has become an indispensable method for verifying integrity, dimensional accuracy and material properties in numerous technical domains. Air-coupled ultrasound offers advantages in terms of measurement flexibility and reduced measurement time, but also presents challenges due to …
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Fiber optic methods for nondestructive testing
… demonstrates the use of fiber optic methods for nondestructive testing of composite materials and aluminum specimens using the acousto-ultrasound approach. A noncontact method using a hybrid interferometer is devised for measuring absolute surface acoustic wave (SAW) amplitudes. The J1..J4 …
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Studies on Data Fusion of Nondestructive Testing
本文氏名 : 刘(劉) 征
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Advances in Nondestructive Testing of Concrete Pavements
Nondestructive testing methods to accurately determine concrete pavement thickness are in increasing demand for verification of performance-based specifications, as the only current technology that provides the required accuracy levels is core extraction. In this work two approaches for pavement …
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Time-frequency domain modelling for ultrasonic nondestructive testing
This thesis endeavours to develop and implement new and improved methods for the characterisation of defects embedded in steel welds through the analysis of data collected by ultrasonic phased array inspections. A factor common to the existing imaging techniques used for flaw characterisation is …
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Development and experimental characterizaton of ultrasonic phased arrays for nondestructive testing
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 1998.
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Life extension of structural components via an improved nondestructive testing methodology
… the flaw detection sensitivity of advanced nondestructive testing (NDT) techniques with respect to structural applications. The techniques analyzed exemplify the incorporation of digital technology into NDT and includes the following: meandering winding magnetometer array (MWM-array@) eddy …
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Anomaly edge effects in thermographic nondestructive testing of polymeric composite sandwich panels
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2002.
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The use of nondestructive testing methods for the condition assessment of concrete bridge girders
… for maintenance and repair decisions. The use of nondestructive testing methods can help reduce the backlog of deficient bridges in two ways. First, these techniques will allow inspectors to get a more accurate view of the condition of a bridge. The second way by which NDT can help is by allowing …
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Nondestructive testing of concrete bridge decks using ground-penetrating radar and the chain drag method
… thesis presents the findings of two different nondestructive techniques that are used for bridge deck analysis: the chain drag method and ground penetrating radar (GPR). The chain drag testing was performed in the laboratory with 23 simulated concrete bridge deck specimens. The specimens …
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Novel Application of Nondestructive Testing to Evaluate Anomalous Conditions in Drilled Shafts and the Geologic Materials Underlying Their Excavations
… Due to their inaccessibility, non-destructive testing (NDT) techniques have received much attention for drilled shaft quality control. However, there are limitations in the NDT tools currently used for structural integrity testing. Moreover, there is no current NDT tool to evaluate conditions …
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Signal processing techniques for ultrasonic inspection
This thesis discusses the need for nondestructive testing and highlights some of the limitations in present day techniques. Special interest has been given to ultrasonic examination techniques and the problems encountered when they are applied to thick welded plates. Some suggestions are given …
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Aspects of holography
… importance, namely: i) qualitative holographic nondestructive testing, as applicable to flaw detection, ii) quantitative holographic interferometry and iii) white-light transfer reflection holography, with particular emphasis on the multiplexing principle. The objects used to evaluate the …
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Efficient computational techniques for electromagnetic propagation and scattering
… medical imaging, geophysical remote sensing, nondestructive testing, and radar. This thesis develops several new techniques for the efficient computer solution of such problems.
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Nondestructive inspection of load induced damage in fiber reinforced polyphenylene sulfide
… of the mechanical properties and nondestructive inspection of the material. The objectives of the nondestructive inspection program were twofold: i) to determine nondestructive testing techniques were most responsive to developing damage and ii) to identify the damage modes using …
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An acousto-ultrasonic system for the evaluation of composite materials
… and its relative worth compared to other nondestructive testing techniques as applied to composite materials. The following two chapters describe the system instrumentation and system software, respectively. Next, comments are given regarding the implementation of the system for research …
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Non-invasive microwave and millimeter wave reflectometry and imaging for human skin diagnosis and materials characterization
… applied in many applications, such as nondestructive testing and evaluation (NDT&E), security inspection and medical diagnosis. In this dissertation, the feasibility of using microwave and millimeter reflectometry and SAR imaging for burn diagnosis is investigated through both …
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