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 354 for “"Nondestructive"”.
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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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Nondestructive evaluation of historic structures
… with destructive testing, engineers use nondestructive evaluation (NDE) to determine the location of key structural elements, locate defects or anomalies in a material, and to determine the quality of a material. Although NDE usually is best applied to homogeneous materials, such as …
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Reflection seismology for nondestructive evaluation
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 2002.
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Fluidic ultrasound generation for nondestructive testing
… performance characteristics and suitability for nondestructive testing (NDT). The publications included in this thesis are the first to present a transient aeroacoustic ultrasonic generator using a bistable fluidic amplifier. This dissertation demonstrates that such a fluidic ultrasonic …
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NONDESTRUCTIVE EVALUATION USING REAL-TIME SHEAROGRAPHY
… explore in depth its potential applications in nondestructive testing and vibration analysis. The development of a simple and effective technique for determining fractional fringe order is also another primary objective in this project. The principle behind the formation of high resolution …
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Hydrogen in metals: a nondestructive test
… and service industries, a need exists for a nondestructive test to determine the presence of hydrogen in a material system. The feasibility of such a system is examined here. Acoustic emission activity resulting from a microhardness indentation is employed to detect hydrogen in A106 and 4340 …
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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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Nondestructive evaluation for hybrid-composite girder bridges
… to be presented is focused on the application of nondestructive evaluation (NDE) technologies of thermography, ultrasonic testing, and acoustic emission testing to assess the quality of placement within the arch section of the HCB. Tap testing, another NDE technique, was also used to test the …
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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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Mechanistic Interpretation of Nondestructive Pavement Testing Deflections
A method is proposed for the backcalculation of material properties in flexible pavements based on the interpretation of surface deflection measurements. ILLI-PAVE, a stress-dependent finite element pavement model, was used to generate data for developing algorithms and nomographs for deflection …
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Scanning measurement testbed for advanced nondestructive evaluation
… safety, have necessitated the development of nondestructive testing methods to quantify the life and reliability of a product during manufacture and service. Described herein, is a testbed to be used in the research and development of these testing methods. A brief motivation for using …
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Impedance-based Nondestructive Evaluation for Additive Manufacturing
… is to provide an alternative to conventional nondestructive evaluation (NDE) techniques for additively manufactured (AM) parts. In essence, the geometrical complexity characteristic of AM processes combined with a phase-change of the feedstock during fabrication complicate the application of …
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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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APPLICATION OF RUTHERFORD BACKSCATTERING SPECTROMETRY IN NONDESTRUCTIVE ANALYSIS.
A Rutherford backscattering spectrometry facility has been designed and built at the University of Arizona. Initial calibration and testing has been carried out in order to accurately characterize the system and make it ready to perform reliable analyses. Also, an explanation of basic RBS …
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Nondestructive photoelastic characterization of monocrystalline silicon photovoltaic wafers
… under a pure tensile load. Since the method is nondestructive, it can be used to calculate and compare the expected Weibull parameters for the same set of wafers under a variety of externally applied loads. The variation in wafer strength when loaded parallel and perpendicular to the direction …
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Microwave imaging of concrete structures from nondestructive evaluation
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 1998.
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Nondestructive evaluation and underwater repair of composite structures
… cost, and simplify repairs. Though underwater nondestructive evaluation of composites has not been well documented, this thesis illustrates the available technologies for underwater evaluation and repair of laminated composite structures, similar to those currently used in marine applications. …
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Nondestructive evaluation of concrete using wideband microwave techniques
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 1995.
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Development and analysis of nondestructive electrokinetic cartilage diagnostics
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2001.
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