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Local Weakening of Honeycomb Core for Improved Surface Quality and Bonding in Co-cured Sandwich Panels

Hamburg University of Technology-Henrik Eschen, Thorsten Schüppstuhl
  • Technical Paper
  • 2019-01-1859
To be published on 2019-09-16 by SAE International in United States
Sandwich panels made of NOMEX honeycomb core and fiber reinforced face sheets are a major component of aircraft interior parts. A common way to locally increase the strength of such panels, e.g. for load introduction, is the local thickening of the face sheets with additional prepreg layers. Curing of such strengthened panels without further processing of the core leads to higher flatness tolerances due to the added thickness as well as residual stresses. Machining of the core in the strengthened areas is possible, but expensive due to high machine costs and additional cleaning processes. In this paper a new automated process for the reduction of the residual stresses in strengthened areas is presented. The process is based on a local reduction of the compressive strength in the surface area of the honeycomb core, which allows for a plastic deformation in thickened areas at curing pressure. For the reduction of compressive strength, a concept based on a robot guided tool with multiple parallel blades is presented. A model based analysis of the process parameters shows that…
 
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Nickel Alloy, Corrosion and Heat-Resistant, Investment Castings 53.3Ni - 16.5Cr - 17Mo - 4.5W - 5.8Fe - 0.40V (CW-12MW) As-Cast

AMS F Corrosion Heat Resistant Alloys Committee
  • Aerospace Material Specification
  • AMS5388K
  • Current
Published 2019-07-30 by SAE International in United States
This specification covers a corrosion and heat-resistant nickel alloy in the form of investment castings.
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Nickel Alloy, Corrosion and Heat-Resistant, Investment Castings 73Ni - 0.14C - 13Cr - 4.5Mo - 2.3Cb (Nb) - 0.75Ti - 6.0Al - 0.010B - 0.10Zr Vacuum Cast, As-Cast

AMS F Corrosion Heat Resistant Alloys Committee
  • Aerospace Material Specification
  • AMS5391H
  • Current
Published 2019-07-30 by SAE International in United States
This specification covers a corrosion and heat-resistant nickel alloy in the form of investment castings.
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Cobalt Alloy, Corrosion and Heat-Resistant, Investment Castings 50.5Co - 26Cr - 15Ni - 6.0Mo As-Cast

AMS F Corrosion Heat Resistant Alloys Committee
  • Aerospace Material Specification
  • AMS5380G
  • Current
Published 2019-07-30 by SAE International in United States
This specification covers a corrosion and heat-resistant cobalt alloy in the form of investment castings.
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Nickel Alloy, Corrosion and Heat-Resistant, Investment Castings 73Ni - 12Cr - 4.5Mo - 2.0Cb - 0.70Ti - 0.05C - 6.0Al - 0.010 - 0.10Zr Vacuum Cast, As-Cast

AMS F Corrosion Heat Resistant Alloys Committee
  • Aerospace Material Specification
  • AMS5377G
  • Current
Published 2019-07-30 by SAE International in United States
This specification covers a corrosion and heat-resistant nickel alloy in the form of investment castings.
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Cobalt Alloy, Corrosion and Heat-Resistant, Investment Castings 62Mo - 27Cr - 2.8Ni - 5.5Mo As-Cast

AMS F Corrosion Heat Resistant Alloys Committee
  • Aerospace Material Specification
  • AMS5385H
  • Current
Published 2019-07-30 by SAE International in United States
This specification covers a corrosion and heat-resistant cobalt alloy in the form of investment castings.
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Nickel Alloy, Corrosion and Heat-Resistant, Investment Castings 65Ni - 28Mo - 5.5Fe - 0.40V (N-12MV) As-Cast

AMS F Corrosion Heat Resistant Alloys Committee
  • Aerospace Material Specification
  • AMS5396F
  • Current
Published 2019-07-30 by SAE International in United States
This specification covers a corrosion and heat-resistant nickel alloy in the form of investment castings.
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Nickel Alloy, Corrosion and Heat-Resistant, Investment Castings 47.5Ni - 22Cr - 1.5Co - 9Mo - 0.60W - 18.5Fe (N-12MV) As-Cast

AMS F Corrosion Heat Resistant Alloys Committee
  • Aerospace Material Specification
  • AMS5390G
  • Current
Published 2019-07-30 by SAE International in United States
This specification covers a corrosion and heat-resistant nickel alloy in the form of investment castings.
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SAE No. 2 Friction Test Machine 6000 rpm Stepped Power Test

Automatic Transmission and Transaxle Committee
  • Ground Vehicle Standard
  • J2488_201907
  • Current
Published 2019-07-24 by SAE International in United States

This SAE Recommended Practice is intended as the definition of a standard test, but may be subject to frequent change to keep pace with experience and technical advances. This should be kept in mind when considering its use.

 

MOUNTING HARDWARE, CUSHION CLAMP, METAL FOR CABLE HARNESS TYING AND SUPPORT, TYPE V, CLASS 1

AE-8C2 Terminating Devices and Tooling Committee
  • Aerospace Standard
  • AS23190/4D
  • Current
Published 2019-07-03 by SAE International in United States
No Abstract Available.
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