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 146 for “"non-destructive testing"”.
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High-resolution ultrasonic non-destructive testing
… pulse wideband ultrasonic transducers in Non-Destructive-Testing (NDT) has been investigated both theoretically and experimentally. It is demonstrated that the resolution of pulse-echo NDT is affected by diffraction effects which also complicate the interpretation of echo signals. These …
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Autonomous unmanned aerial vehicle for non-destructive testing
… are receiving increasing attention for use in Non-Destructive Testing / Evaluation (NDT / NDE), due to affordability, safety, and the ability to access areas where manned inspection is not practical. The mobility and size of UAVs offer the flexibility to quickly deploy remote inspections of …
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Virtual source aperture ultrasonic imaging for non destructive testing
Ultrasonic testing is of huge importance when it comes to assessing the integrity of a huge variety of structures and components. Virtual Source Aperture (VSA) is an new advanced method of testing and is considered to be a hybrid between traditional phased array (PA) techniques and full matrix …
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Compressive sensing based non-destructive testing using ultrasonic arrays.
… and the notion of sparse signal recovery to the non-destructive testing application, using ultrasonic arrays. In many signal processing applications including array signal processing, there is a remarkable effort to use the concept of sparsity to solve an under-determined system of equations …
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Multi-scale metrology for automated non-destructive testing systems
… diffcult to inspect rapidly using conventional Non-Destructive Testing (NDT) techniques. Industrial robots provide a means of automating the inspection process due to their high dexterity and improved path planning methods.This thesis concerns using industrial robots as a method for assessing …
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Ultrasound field measurement and modelling for non-destructive testing
Ultrasonic Testing (UT) is one of most important methods of Non-destructive Testing (NDT) and ultrasonic waves can be generated and detected by means of numeric methods. This thesis focuses on piezoelectric transducers and Electromagnetic Acoustical Transducer (EMAT). For testing with piezoelectric …
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Lossless image compression for aerospace non-destructive testing apllications
… processmg techniques with the application to Non-destructive Testing (NDT) images of aircraft components. The research project includes investigation of current data compression techniques and design of efficient compression methods for NDT images. Literature review was done initially to …
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Application and Evaluation of Non-Destructive Testing Methods for Buried Pipes
This thesis investigated and evaluated non-destructive condition assessment methods for both cast iron water pipes and large diameter sewer and culvert systems. A state-of-the-art review of Non-destructive Testing (NDT) technologies available for cast iron water pipes and corrugated steel culverts …
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Non-Destructive Testing of metallic structures based on electromagnetic computational methods
… (EM) computational methods in the field of non-destructive testing (NDT).<br/><br/>Conductive samples affect the electromagnetic field generated by coils with alternating induced currents. Referring to eddy current effects, materials with different properties (magnetic permeability, …
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Ultrasonic array imaging for multi-layer materials in non-destructive testing applications.
… challenge in seismology, medical diagnosis, and non-destructive testing. One application for multi-layer imaging is ultrasonic immersion test where the material under test and transducer array are immersed in water. The main imaging challenge in immersion test (or in any multi-layer medium) is …
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Comparative study of non-destructive testing methods of defect detection on aircraft
… light-weight structures is a new challenge for non-destructive testing (NDT) which requires techniques that respond with a high probability of detection of defects on such high-specific strength materials. In this thesis, Digital shearography and Infrared Thermography (IRT) techniques are …
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Evaluation of radar & other predictors in non-destructive testing of bridge decks
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Civil Engineering, 1990.
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High Flux Neutron Imaging for highly dynamic and time resolved non-destructive testing
Im Rahmen der hier beschriebenen Arbeit wurde eine Anlage für Neutronenradiographie und -tomographie, Neutrograph, am Institut Laue-Langevin (ILL) weiterentwickelt, Experimente durchgeführt und neue Mess- und Auswertungsmethoden entwickelt. Die Besonderheit von Neutrograph ist seine konkurrenzlose …
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Application of advanced non-destructive testing methods on bridge health assessment and analysis
… assessments take the form of individual NDT (non-destructive techniques) detecting individual defects. However value can be added to these results by combining and comparing the findings of several different NDT surveys. By completing this, a more accurate assessment of bridge health is …
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Effective and Efficient Non-Destructive Testing of Large and Complex Shaped Aircraft Structures
… enhance the defect detection capabilities of nondestructive testing (NDT) for the aircraft industry. Modem aircraft non-destructive testing requires the detection of small defects in large complex shaped components. Research has therefore focused on the limitations of ultrasonic, radioscopic …
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Anisotropic wave guides-- propagation, focusing and dispersive phenomena with applications for non-destructive testing.
Acoustic Non-Destructive Testing (NDT) has a long history of applications in fatigue monitoring, fault testing, and more recently production control. A very large family of manufactured and raw materials consist of thin layers. Some examples include rolled aluminum, window glass, plywood, …
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Performance Quantification of Interlayer Systems in Flexible Pavements Using Finite Element Analysis, Instrument Response, and Non Destructive Testing
This study quantifies the benefits of two interlayer systems (steel reinforcing netting and a newly-designed geocomposite membrane) in different pavement applications. Steel reinforcing netting and geocomposite membrane have been installed at the Virginia Smart Road in four different sections. …
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Through-Life Monitoring of the impact of vibration on the reliability of area array packages using Non- Destructive Testing
… studied before, the various steps for successful testing, through life monitoring of the solder joints and data analysis will be investigated and discussed. Based on automobile industry standards, a real time vibration profile was obtained with the help of Delphi experts, who are the industry …
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