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    composite materials tagged posts

    Silk Sensor could speed development of new Infrastructure, Aerospace and Consumer Materials

    March 19, 2017, Categories  Physics, Technology/Electronics

    These are examples of the silk used in experiments to detect damage in composites, shown under black light. (Left) Ordinary fibroin of the Bombyx mori silk worm. The observed fluorescence is the result of molecules already present in the protein structure of the fiber. (Middle) Mechanophore-labeled silk fiber fluoresces in response to damage or stress. (Right) Control sample without the mechanophore. Credit: Chelsea Davis and Jeremiah Woodcock/NIST

    These are examples of the silk used in experiments to detect damage in composites, shown under black light. (Left) Ordinary fibroin of the Bombyx mori silk worm. The observed fluorescence is the result of molecules already present in the protein structure of the fiber. (Middle) Mechanophore-labeled silk fiber fluoresces in response to damage or stress. (Right) Control sample without the mechanophore. Credit: Chelsea Davis and Jeremiah Woodcock/NIST

    Researchers have found a way to use molecules of dye to see inside some of the new composite materials being tested for bridges, cars and sporting goods. What’s needed are new lightweight, energy-saving composites that won’t crack or break even after prolonged exposure to environmental or structural stress...

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    It’s a 3D Printer, but not as we know it

    January 20, 2016, Categories  Physics, Technology/Electronics

    Schematic representation of printer and ultrasonic manipulation rig. (a) Switchable laser module is attached to the print head carriage, and traces out the shape of the printed part. The laser can be deliberately defocused to cure large regions slowly by increasing the height of the laser module. (b) Focused laser beam cures resin within the cavity of the ultrasonic manipulation device. P = PMMA, W = Water, PZT = lead zirconate titanate transducers, R = spot-a low Viscosity photocurable resin. Cross sections of the bundles of fibres lying within traps are shown, and are separated by half a wavelength.

    Schematic representation of printer and ultrasonic manipulation rig. (a) Switchable laser module is attached to the print head carriage, and traces out the shape of the printed part. The laser can be deliberately defocused to cure large regions slowly by increasing the height of the laser module. (b) Focused laser beam cures resin within the cavity of the ultrasonic manipulation device. P = PMMA, W = Water, PZT = lead zirconate titanate transducers, R = spot-a low Viscosity photocurable resin. Cross sections of the bundles of fibres lying within traps are shown, and are separated by half a wavelength.

    An engineering team has developed a new type of 3D printing that can print composite materials, which are used in many high performance products eg tennis rackets, golf clubs and airplane...

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