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Proceedings of a Workshop on Materials State Awareness by National Research Council, Division on Engineering and

By National Research Council, Division on Engineering and Physical Sciences, National Materials Advisory Board, Emily Ann Meyer

In order to make sure powerful army operations and persisted warfighter protection, the performance and integrity of the apparatus used also needs to be ensured. For the prior a number of years, the Nondestructive assessment department on the Air strength study Laboratory (AFRL) has centred actively at the improvement of embedded sensing applied sciences for the real-time tracking of wear and tear states in plane, turbine engines, and aerospace buildings. those sensing applied sciences needs to be built to be used in environments starting from the conventional to the intense, confronting researchers with the necessity to comprehend concerns related to reliability, instant telemetry, and sign processing equipment. also, there's a have to improve technology and expertise that would deal with the sensing of a fabric country on the microstructure point, precursor harm on the dislocation point, and fatigue-crack dimension inhabitants. to handle those concerns, the nationwide learn Council convened a workshop at which audio system gave their own views on technological methods to figuring out fabrics nation and defined strength demanding situations and advances in know-how. This e-book is composed essentially of prolonged abstracts of the workshop audio system' shows, conveying the character and scope of the cloth presented.

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Proceedings of a Workshop on Materials State Awareness

For you to ascertain powerful army operations and persisted warfighter protection, the performance and integrity of the gear used should also be ensured. For the prior a number of years, the Nondestructive review department on the Air strength learn Laboratory (AFRL) has targeted actively at the improvement of embedded sensing applied sciences for the real-time tracking of wear states in airplane, turbine engines, and aerospace constructions.

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A few examples of 37 Copyright © National Academy of Sciences. All rights reserved. html 38 Proceedings of a Workshop on Materials State Awareness nonmilitary applications include (1) medical patient diagnosis or assessment based on integrating information from diagnostic tests, vital signs, patient symptoms, and so forth; (2) weather forecasting using ground-, aircraft-, subsurface-, and satellite-based sensors; and (3) robot navigation using map and visualization sources. There are several issues that need to be addressed in the design and development of a data fusion-based system, including: (1) the number and type of information sources, (2) what information from each source is to be used to get the most from the data fusion process, (3) the operating conditions of the system for which data fusion will foster enhanced system operation, (4) the system architecture to provide for where and how the data from different sources are to be fused, (5) the algorithm type and choice that are appropriate for the data sources and the application, (6) the target level of performance of the data fusion process, and (7) the ability of the system to adapt in a dynamic environment.

Finally, a technology roadmap is presented that lays out a strategy that GE is pursuing in improving the prediction of the remaining life accuracy of engine components. I. Rokhlin, Ohio State University Several research programs seem to represent applications of the materials state awareness concepts well: for example, how one can predict the effect of the evolution of the state of a material (including damage) in service and the resulting mechanical state. First, the problem of cold dwell fatigue (CDF) in Ti alloys, used in engine components, is reviewed.

This is due to the fact that these signals partially reflect and transmit through boundaries of materials with dissimilar dielectric properties. Consequently, the presence of voids, disbonds, delaminations, and so forth can be easily and effectively detected. The thickness and location of such flaws within the structure can also be evaluated, resulting in critical information about their relative severity and impact on the inservice operation of a composite structure. In addition to the above applications, there are numerous structures and applications that may fall under this category of inspection: namely, detection and evaluation of corrosion under paint and/or dielectric composite laminates, accurate thickness evaluation of special coatings and paints, and thick composite inspection.

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