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Self-Sensing, Lightweight and High Modulus Carbon Nanotube Composites for Improved Efficiency and Safety of Electric Vehicles

NoPo Nanotechnologies India Pvt Ltd.-Gadhadar Changalaraya Reddy, Aparna Allannavar
  • Technical Paper
  • 2019-28-2532
Published 2019-11-21 by SAE International in United States
Carbon Composites (CFRP) have been touted to be an essential component of future automobiles due to their mechanical properties and lightweight. CFRP has been adopted successfully for secondary and primary structures in Aerospace industry. In Automobiles, they are incorporated in models like the BMW i-series. CFRP suffers from 2 major problems. Delamination of Composites leads to catastrophic and rapid failure which could be dangerous in passenger vehicles. Delamination occurs whenever there is a shock on the composite. Secondly, Composites need regular expensive maintenance to ensure that the material is intact and will not compromise passenger safety. Carbon Nanotubes in composites have shown a substantial increase in delamination resistance. A 0.1wt% addition of HiPCO® Single-walled Carbon Nanotube provides both self-sensing and improved fracture resistance. Here we report results of our work with NoPo HiPCO® Nanotubes with small amounts of Iron. 6K Carbon fiber was used as the fiber reinforcement. NoPo HiPCO® Nanotubes were reinforced in the Epoxy system by sonication. HiPCO® Nanotubes were produced using standard parameters. The coupons of CENCE composite were made using VARTM…
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Heat Shield Insulation for Thermal Challenges in Automotive Exhaust System

Sharda Motor Industries, Ltd.-Sivanandi Rajadurai, Ananth S
  • Technical Paper
  • 2019-28-2539
Published 2019-11-21 by SAE International in United States
While advanced automotive system assemblies contribute greater value to automobile safety, reliability, emission/noise performance and comfort, they are also generating higher temperatures that can reduce the functionality and reliability of the system over time. Thermal management and proper insulation are extremely important and highly demanding for the functioning of BSVI and RDE vehicles. Frugal engineering is mandatory to develop heat shield in the exhaust system with minimum heat loss. Heat shield design parameters such as insulation material type, insulation material composition, insulation thickness, insulation density, air gap thickness and outer layer material are studied for their influences on skin temperature using mathematical calculation, CFD simulation and measurement. Simulation results are comparable to that of the test results within 10% deviation. The performance index is calculated using the temperature gradient between the pipe surface and the external skin temperature. The performance index increases with material insulation thickness and insulation material density. Increase in insulation thickness from 6 mm to 19 mm reduces the skin temperature from 44% to 77%. The specialty insulation material provides a high…
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Titanium Alloy Sheet, Strip, and Plate 6Al - 6V - 2Sn Solution Heat Treated and Aged

AMS G Titanium and Refractory Metals Committee
  • Aerospace Material Specification
  • AMS4990D
  • Current
Published 2019-11-05 by SAE International in United States
This specification covers a titanium alloy in the form of sheet, strip, and plate up through 4 inches (101.6 mm).
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Titanium Alloy Bars, Forgings, and Rings 6Al - 4V Extra Low Interstitial (ELI) Duplex Annealed, Fracture Toughness

AMS G Titanium and Refractory Metals Committee
  • Aerospace Material Specification
  • AMS4931G
  • Current
Published 2019-11-05 by SAE International in United States
This specification covers a titanium alloy in the form of bars 6.000 inches (152.40 mm) and under in nominal diameter or least distance between parallel sides, forgings and flash welded rings 6.000 inches (152.40 mm) and under in thickness, and stock for forging and stock for flash welded rings of any size.
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Titanium Alloy Welding Wire 5Al - 2.5Sn

AMS G Titanium and Refractory Metals Committee
  • Aerospace Material Specification
  • AMS4953H
  • Current
Published 2019-11-05 by SAE International in United States
This specification covers a titanium alloy in the form of welding wire.
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Additively Manufactured Component Substantiation

AMS AM Additive Manufacturing
  • Aerospace Standard
  • AIR7352
  • Current
Published 2019-10-31 by SAE International in United States
This AIR is applicable to components fabricated using additive manufacturing (AM) processes. The discussion is generic with respect to specific additive processes as much as possible. Each additive process has unique considerations that should be addressed in any effort to substantiate additively manufactured components, This specification is written for metallics but conceptually could be applied to non-metallics.
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Titanium Alloy Wire 44.5 Cb

AMS G Titanium and Refractory Metals Committee
  • Aerospace Material Specification
  • AMS4982F
  • Current
Published 2019-10-29 by SAE International in United States
The specification covers a titanium alloy in the form of wire.
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Aluminum Beryllium, NNS Preforms Hot Isostatic Pressed 38Al - 62Be

AMS G Titanium and Refractory Metals Committee
  • Aerospace Material Specification
  • AMS7909D
  • Current
Published 2019-10-29 by SAE International in United States
This specification covers aluminum-beryllium powders consolidated by hot isostatic pressing (HIP) into the form of blocks, blanks or shapes.
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WIRE, ELECTRICAL, POLYTETRAFLUOROETHYLENE/POLYMIDE INSULATED, LIGHT WEIGHT, TIN COATED, COPPER CONDUCTOR, 150 °C, 600 VOLT, ROHS

AE-8D Wire and Cable Committee
  • Aerospace Standard
  • AS22759/80C
  • Current
Published 2019-10-24 by SAE International in United States
No Abstract Available.
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WIRE, ELECTRICAL, POLYTETRAFLUOROETHYLENE/POLYIMIDE INSULATED, SMOOTH SURFACE, LIGHT WEIGHT, SILVER-COATED COPPER CONDUCTOR, 200 °C, 600 VOLTS ROHS

AE-8D Wire and Cable Committee
  • Aerospace Standard
  • AS22759/191A
  • Current
Published 2019-10-24 by SAE International in United States
No Abstract Available.
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