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Currently, there exist several different types of structural health monitoring (SHM) systems that are in the stage of development and/or are being tested for use in real-world applications. For a number of years, Structural Health Monitoring (SHM) systems have demonstrated feasibility in laboratory and controlled testing environments. Acellent has been(More)
This paper reports on a new generation of composites fabricated by placing a low modulus, lightweight matrix over multiple layers of a relatively stiff reinforcement. These remarkable concoctions called Strategically Tuned Absolutely Resilient Structures (STARS) are designed to store strain energy in the form of elastic deformation that can be released in a(More)
This paper describes how finite element and experimental modal analysis can be used to characterize the dynamic behavior of plates made from a new class of Polymer-Enhanced, Graphite Reinforced Cementitious Composite (PEGRCC) materials. A good agreement is obtained between both methods and results show that PEGRCC materials can be modeled and tested using(More)
Strategically Tuned Absolutely Resilient Structures (STARS) are being designed to store potential energy in the form of elastic deformation that can be released in a controlled fashion as work or kinetic energy. This paper outlines steps being taken to monitor the structural health of STARS by making modifications to a Remote Readiness Asset Prognostic and(More)
This paper discusses Strategically Tuned Absolutely Resilient Structures (STARS) and steps taken to improve their performance by developing lightweight, high-performance cementitious composites that rely on the interfacial bonding between the aggregate [Poly(vinyl butyral) (PVB)] and reinforcement [Poly(vinyl alcohol) (PVA) fiber]. PVB is selected because(More)
This paper describes how Strategically Tuned Absolutely Resilient Structures (STARS) are being designed for energy transfer and morphing applications based on the strength, stiffness, and the position of the component materials in the composite section. The discussion ranges from on-line health monitoring and smart diagnostics/prognostics strategies(More)
Tactical missiles within the US Army are regularly subjected to severe stresses such as long term exposure in harsh environments and transportation handling. These stresses factor into the ageing, deterioration, and eventual decommissioning of some of the Army’s critical warfighting assets. The negative reliability impacts associated with long-term ageing(More)
This paper describes a method to duplicate the structural performance of a graphite-reinforced cementitious composite as the mix proportions and constituents of its cementitious matrix are varied. This is accomplished by placing a test specimen constructed using a modified mixture over a reinforcing scheme identical to that of a control standard and then(More)
Optical sensors aboard space vehicles designated to perform seeker functions need to generate multispectral images in the mid-wave infrared (MWIR) and long-wave infrared (LWIR) spectral regions in order to investigate and classify man-made space objects, and to distinguish them relative to the interfering scene clutter. The spectral imager part of the(More)
Analatom is developing a Structural Health Monitoring (SHM) system which provides both corrosion and strain measurements. This combination of data provides critical assessment of structural health, leading to prediction of failure. The SHM system’s sensors can be permanently installed in high value structures, such as buildings, bridges, or aircraft, and(More)