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Quantitative Diagnostics of Multilayered Composite Structures with Ultrasonic Guided Waves

This nondestructive methodology inspects a sound-absorbing composite structural system consisting of polymeric and metallic materials.

Aging infrastructure has a major impact on safety, increasing the need to assess damage severity. Machinery, systems, and components such as airplanes, cars, pumps, and pipes in the oil and chemical industry are subject to varying cyclic service loading and environmental influences. Sometimes multilayered coatings are used, requiring a high-resolution inspection to confirm the presence of a defect such as a delamination, and accurately locate and quantify its size. Highly attenuating materials may significantly increase the inspection time while limiting defect observability. Guided waves have been recognized as having excellent potential for nondestructive inspection. However, the presence of viscoelastic coatings used for corrosion protection is one of the major obstacles for guided wave inspection.

Posted in: Briefs, Aerospace, Defense, Manufacturing & Prototyping, Materials, Diagnostics, Composite materials, Inspections, Non-destructive tests
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Reactive, Multifunctional, Micellar, Composite Nanoparticles for Destruction of Bio-Agents

Multifunctional composites have been investigated for destruction of bio-agents. These materials’ unique properties at the nano scale, including their abrasive character and high surface area leading to very close contact with cells, and their unusual surface morphology leading to high surface reactivity, make them promising biocides. Nanoparticles can also be prepared in a variety of forms such as powders, slurries, pellets, and membranes, making them more convenient and widely applicable for bio-agent destruction. Additionally, nanoparticles can generally be easily stored, which increases their flexibility.

Posted in: Briefs, Aerospace, Defense, Materials, Composite materials, Nanomaterials
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Signal Compression Technology Enables E-Fan's Flight, Potential Enhanced 'Black Box' Possibilities

V-Nova Ltd. demonstrated the capabilities of its PERSEUS data compression technology for aerospace applications as part of Airbus’ all-electric E-Fan technology demonstrator aircraft’s flight across the English Channel.

Posted in: Technology Update, Defense, Data management, Aircraft
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TRB Turns Composites Focus to Aerospace Sector

TRB Lightweight Structures Ltd. recently released an aerospace-grade lightweight honeycomb composite panel designed for interior applications, expanding the application areas for its range of composite flat panels.

Posted in: Technology Update, Defense, Composite materials
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Preparing for First Flight on Mars

With its eye on Mars, NASA Armstrong has been working on a prototype it refers to as the Preliminary Research Aerodynamic Design to Land on Mars, or Prandtl-m, which is “a flying wing aircraft with a twist.” It is planned to be ready for launch from a high-altitude balloon later this year and will be released at about 100,000 ft. That altitude will allow it to operate in similar flight conditions as the Martian atmosphere, according to Al Bowers, NASA Armstrong Chief Scientist and Prandtl-m Program Manager.

Posted in: Technology Update, Defense, Product development, Aircraft
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Army Engineers Develop Anti-Drone Technology

Army engineers, who are seeking to adapt ongoing research to counter aerial systems that could threaten soldiers, successfully shot down two aircraft as part of their final technology demonstration. Although the research project began with the objective to counter rockets, artillery and mortars, the project scope was expanded to include unmanned aerial threats, sometimes called drones, whose use has expanded rapidly.

Posted in: News, Defense
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Lab Research Mimics Blast-Induced Brain Trauma in Soldiers

Researchers have developed a procedure to mimic in laboratory experiments a form of brain trauma commonly seen in combat veterans, and findings suggest a new diagnostic tool for early detection and a potential treatment.

Posted in: News, Defense
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Sandia Works on Nuclear Weapon Life Extension Program

Sandia National Laboratories is doing what it hasn’t done in decades: extending the life of a nuclear warhead at the same time the U.S. Air Force develops a replacement cruise missile that will carry the weapon. The goal of the W80-4 Life Extension Program (LEP) is refurbishing the W80 warhead with replacement components for aging technology and components that have limited lifespans. Sandia’s California site is responsible for development of non- nuclear components and subsystems and for systems integration. Lawrence Livermore National Laboratory is responsible for the refurbishment of the nuclear explosive package and joint development of detonators with safety features.

Posted in: News, Defense
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New Anechoic Chamber Makes Room for Larger Vehicle Tests

The Army recently increased its ability to test radio frequencies used by soldier technologies when it opened one of the largest anechoic chambers on the East Coast. The Radio-frequency Electro-Magnetic Compatibility and Antenna Test (REMCAT) laboratory provides additional testing space required for larger and mobile vehicle-mounted projects. This space allows the U.S. Army Communications-Electronics Research, Development and Engineering Center (CERDEC) to test vehicles in a wide variety of radio frequency spectrum tests, allowing maximum function while maintaining accurate performance measurement.

Posted in: News, Defense
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Disappearing Carbon Circuits on Graphene Could Have Security Uses

Using carbon atoms deposited on graphene with a focused electron beam process, Georgia Institute of Technology professor Andrei Fedorov and collaborators have demonstrated a technique for creating dynamic patterns on graphene surfaces. The patterns could be used to make reconfigurable electronic circuits, which evolve over a period of hours before ultimately disappearing into a new electronic state of the graphene. Graphene is also made up of carbon atoms, but in a highly-ordered form.

Posted in: News, Defense
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