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Paper-thin impact-proof

Paper-thin impact-proof. ARMELLINI Fabian ; AGLAT Arthur. High speed collisions damage devices. Blast or ballistic impacts induce deformation and failure mechanisms. Ice particles, hailstones Sand dust Micrometeorites, space debris Bullets.

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Paper-thin impact-proof

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  1. Paper-thin impact-proof ARMELLINI Fabian ; AGLAT Arthur

  2. High speed collisions damage devices Blast or ballistic impacts induce deformation and failure mechanisms. • Ice particles, hailstones • Sand dust • Micrometeorites, space debris • Bullets Paper-thin impact-proof

  3. Adaptive Nano-material to solve high speed impact problem Paper-thin impact-proof can act as a shield for these devices. • It can improve the resistance of : • Glass • Satellites, spacecraft • Jet engine turbine blades • etc… Paper-thin impact-proof

  4. Working principles • Protecting devices with periodic glassy-rubbery layered block-copolymer • Soft and rubbery material is mainly polyurethane • Hard and glassy material is glass Schematic and SEM of the nanostructure polymer Paper-thin impact-proof

  5. Working principles particle • A lot of kinetic energy needs to be diffused to stop the particle : • Temperature rises up to 3000°C • Pressure increases in front of the particle • Rubbery and glassy segments melt together to form both a liquid-like disordered phase and granular Paper-thin impact-proof

  6. Paper thin already exists • Inability to reliably test such materials against projectile impacts. • Development of a breakthrough stress-test that fires microscopic glass on the material. The glass beads are described as « millionths of a meter in diameter » Paper-thin impact-proof

  7. Test observation • How is the material deformed after an impact ? • The team found that their material was 30 percent more resilient to head-on (rather than edge-on) collisions. An electron-microscope image shows a cross-section of a layered polymer and the crater left by a glass bead in an edge-on impact Paper-thin impact-proof

  8. Results • This approach will provide needed understanding of the mechanisms governing how a projectile penetrates protective vests. • This innovative testing method could lead to paper-thin bullet-proof armor. Paper-thin impact-proof

  9. Others applications ? • Perhaps the tests could accelerate the development of shielding for satellites, space suits, shuttles, and even more. Paper-thin impact-proof

  10. References • Lee J.-H et aI. High strain rate deformation of layered nanocomposites. Nat. Commun. 3:1164 doi: 10.1038/ncomms2166 (2012) • MIT News Office • Sarva S.S., Stress-strain behavior of a polyurea and a polyurethane from low to high strain rates. Polymer 48, 2208-2213 Paper-thin impact-proof

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