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Enhanced Ultrasonic Characterization of Assemblies,TLL{_}9

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Description

The solid state bonded joint between two components; called an autoclave bond, is critical to the performance of a weapon system. A nondestructive method to assess the integrity of these joints is needed to certify the weapon for extended life. This project is developing ultrasonic technologies for bond quality assessment. Existing ultrasonic technology easily maps totally unbonded areas in a bond line. As an example, Figure 1 is an ultrasonic image of the bondline in a tensile specimen that was taken from a surrogate autoclave bond. We enhanced this technology to quantify the mechanical properties of a bond. There are ... continued below

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896 Kilobytes pages

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Thomas, G. & Chinn, D. February 22, 2000.

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Description

The solid state bonded joint between two components; called an autoclave bond, is critical to the performance of a weapon system. A nondestructive method to assess the integrity of these joints is needed to certify the weapon for extended life. This project is developing ultrasonic technologies for bond quality assessment. Existing ultrasonic technology easily maps totally unbonded areas in a bond line. As an example, Figure 1 is an ultrasonic image of the bondline in a tensile specimen that was taken from a surrogate autoclave bond. We enhanced this technology to quantify the mechanical properties of a bond. There are situations when a bond interface appears intact by existing inspection methods, but fails under minimal loading. We developed an ultrasonic technique to eliminate this problem and assess the durability of the bond. Our approach is based on advanced signal processing and artificial intelligence techniques that extract information from the ultrasonic signal after it interacts with the bondline. We successfully demonstrated this technique on surrogate samples. We also designed and began assembly of an ultrasonic system to evaluate weapon components. Our next step is to acquire ultrasonic data on real parts and tailor the bond classification algorithm to detect and image defective bond regions.

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896 Kilobytes pages

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  • Other Information: PBD: 22 Feb 2000

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  • Report No.: UCRL-ID-131699-Rev-1
  • Grant Number: W-7405-Eng-48
  • DOI: 10.2172/791734 | External Link
  • Office of Scientific & Technical Information Report Number: 791734
  • Archival Resource Key: ark:/67531/metadc740062

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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  • February 22, 2000

Added to The UNT Digital Library

  • Oct. 19, 2015, 7:39 p.m.

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  • May 6, 2016, 3:18 p.m.

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Thomas, G. & Chinn, D. Enhanced Ultrasonic Characterization of Assemblies,TLL{_}9, report, February 22, 2000; California. (digital.library.unt.edu/ark:/67531/metadc740062/: accessed January 24, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.