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• Hamza Ijaz 2014-IM-36
• Shoaib Muzaffer 2014-IM-37
• Atif Qayyum Khan 2014-IM-38
1
Role of Composits In
Stealth Technology
2
Stealth Technology
3
Low observable technology
Used in military aviation
Reduces detection range of an air
craft
Partial indivisibility to radar and
other detection
Without stealth
(History)
The first “STEALTH” ships have been
developed in Germany during the last years of
WWII.
This technique has also been used in aircrafts.
Later Americans worked on this
technology and succeeded.
4
• Radar-absorbent material, or RAM, is a class
of materials used in stealth technology to
disguise a vehicle or structure from radar
detection.
• A common misunderstanding is that RAM
makes an object invisible to radar.
What is Radar Absorbing material orWhat is Radar Absorbing material or
RAM (stealth)?RAM (stealth)?
5
Function & Working of RAM (stealth)Function & Working of RAM (stealth)
• Nano-structural composite material, absorbing
without reflection radar wave.
• Foam absorber
• Iron ball coating
• Rubber composite
6
Foam Absorber
• Fireproofed urethane foam loaded with
conductive carbon black
• [carbonyl iron spherical particles, and/or
crystalline graphite particles] in mixtures
between 0.05% and 0.1% (by weight in
finished product)
Honey comb Square base pyramids 7
Iron ball coating
•Tiny spheres coated with carbonyl iron
or ferrite
•contain traces of carbon, oxygen, and
nitrogen
•Grains are embedded in polymer matrix
(epoxy resin)
8
Iron ball coating(Working)
• Molecular oscillations
• Conversion of Radar energy to heat
energy
• Heat is further dissipated by the plane
surface
9
F-22 RAPTORF-22 RAPTOR
10
Rubber composite
11
• Graphite embedded in rubber matrix
• Other semiconductor materials can also
be used
• Layered structure
• Efficiency is affected by sea water
• Withstand the water drag force
Mostly used by
submarines
Thanks!
12
References
13
1. http://www.totalairdominance.50megs.com/stealth.htm
• 2. http://en.wikipedia.org/wiki/Stealth_technology
• 3. http://en.wikipedia.org/wiki/Radar
• 4. http://en.wikipedia.org/wiki/Stealth_ship
• 5. http://www.resonancepub.com/images/stealth_ship.gif
• 6. http://images.google.co.in/images
• 7. http://www.airplanedesign.info/51.htm
• 8. http://www.military-heat.com/43/russian-plasma-
stealth-fighters/
Date of Access : 20-NOV-2016

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Role of Composites in Stealth Technology

  • 1. Group Members • Hamza Ijaz 2014-IM-36 • Shoaib Muzaffer 2014-IM-37 • Atif Qayyum Khan 2014-IM-38 1
  • 2. Role of Composits In Stealth Technology 2
  • 3. Stealth Technology 3 Low observable technology Used in military aviation Reduces detection range of an air craft Partial indivisibility to radar and other detection Without stealth
  • 4. (History) The first “STEALTH” ships have been developed in Germany during the last years of WWII. This technique has also been used in aircrafts. Later Americans worked on this technology and succeeded. 4
  • 5. • Radar-absorbent material, or RAM, is a class of materials used in stealth technology to disguise a vehicle or structure from radar detection. • A common misunderstanding is that RAM makes an object invisible to radar. What is Radar Absorbing material orWhat is Radar Absorbing material or RAM (stealth)?RAM (stealth)? 5
  • 6. Function & Working of RAM (stealth)Function & Working of RAM (stealth) • Nano-structural composite material, absorbing without reflection radar wave. • Foam absorber • Iron ball coating • Rubber composite 6
  • 7. Foam Absorber • Fireproofed urethane foam loaded with conductive carbon black • [carbonyl iron spherical particles, and/or crystalline graphite particles] in mixtures between 0.05% and 0.1% (by weight in finished product) Honey comb Square base pyramids 7
  • 8. Iron ball coating •Tiny spheres coated with carbonyl iron or ferrite •contain traces of carbon, oxygen, and nitrogen •Grains are embedded in polymer matrix (epoxy resin) 8
  • 9. Iron ball coating(Working) • Molecular oscillations • Conversion of Radar energy to heat energy • Heat is further dissipated by the plane surface 9
  • 11. Rubber composite 11 • Graphite embedded in rubber matrix • Other semiconductor materials can also be used • Layered structure • Efficiency is affected by sea water • Withstand the water drag force Mostly used by submarines
  • 13. References 13 1. http://www.totalairdominance.50megs.com/stealth.htm • 2. http://en.wikipedia.org/wiki/Stealth_technology • 3. http://en.wikipedia.org/wiki/Radar • 4. http://en.wikipedia.org/wiki/Stealth_ship • 5. http://www.resonancepub.com/images/stealth_ship.gif • 6. http://images.google.co.in/images • 7. http://www.airplanedesign.info/51.htm • 8. http://www.military-heat.com/43/russian-plasma- stealth-fighters/ Date of Access : 20-NOV-2016