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Putting failure in context - Importance of the Digital Twin & Digital Thread for Predictive Maintenance in Aerospace

Aras Corp.-Suresh Iyer, Marc lind
  • Technical Paper
  • 2020-01-0051
To be published on 2020-03-10 by SAE International in United States
KEYWORDS Digital Thread, Digital Twin, Predictive Maintenance ABSTRACT Competitive disruption combined with economic uncertainty and regulatory pressure is forcing fundamental changes in the maintenance industry. At the same time, new complexities are being introduced with next generation aircraft and changing business models. Initiatives for greater efficiencies, optimization and predictive maintenance are becoming critical to survival as market realities continue to unfold. Yet, most organization's digital strategies focus on technology infrastructure like big data clouds, data lakes and analytics for performance data without taking into account the necessary context for interpretation, analysis and simulation - the Digital Twin configuration. In many cases, the disconnected nature of existing processes and systems actually make utilizing time series data generated during operation difficult or even impossible. In addition, the ability to understand and act upon these data often require traceability to information from previous activities - a Digital Thread. To complicate matters further when artificial intelligence / machine learning is introduced the necessity becomes even greater. In this session, the authors will discuss why global maintenance operations will require…
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AFP Processing of Dry Fiber Materials (DFP) for Improved Rates and Reliability

Electroimpact Inc.-Michael Assadi, Tyler Field
  • Technical Paper
  • 2020-01-0030
To be published on 2020-03-10 by SAE International in United States
This paper explores the differences found when processing dry-fiber, thermoset, carbon materials (DFP) as compared to processing pre-preg, thermoset materials with Automated Fiber Placement (AFP) equipment. When comparing these two processes, heating systems and tension control must be modified from traditional AFP systems. These new heating systems also require enhanced safety measures. Existing safety systems have been designed to accommodate high performance AFP equipment. As a result, the changes required to accommodate DFP heating systems have become negligible. Although processing dry fiber requires a higher level of heating, tension control and added safety measures, once these differences are overcome, processing rates and reliability are significantly improved. Specifically, overall payout speeds and steering speeds can be increased for dry fiber resulting in increased laydown rates. The lack of resin within the material greatly reduces resin build-up for longer maintenance intervals. This also results in greater reliability by minimizing or eliminating the associated problems with resin build-up. All of these advantages increase the machine utilization when processing aerospace parts made from dry fiber materials with AFP equipment.
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CONNECTORS, ELECTRICAL, CIRCULAR, MINIATURE, COMPOSITE, HIGH DENSITY, QUICK COUPLING, ENVIRONMENT RESISTANT, REMOVABLE CRIMP CONTACTS, PLUG (SERIES A)

AE-8C1 Connectors Committee
  • Aerospace Standard
  • AS29600/12A
  • Current
Published 2020-01-21 by SAE International in United States
No Abstract Available.
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CONNECTORS, ELECTRICAL, CIRCULAR, MINIATURE, COMPOSITE, HIGH DENSITY, QUICK COUPLING, ENVIRONMENT RESISTANT, REMOVABLE CRIMP CONTACTS, RECEPTACLE, FLANGED (SERIES A)

AE-8C1 Connectors Committee
  • Aerospace Standard
  • AS29600/10A
  • Current
Published 2020-01-21 by SAE International in United States
No Abstract Available.
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Automotive Straight Thread Filter and Drain Plugs

Hydraulic Tube Fittings Committee
  • Ground Vehicle Standard
  • J532_202001
  • Current
Published 2020-01-15 by SAE International in United States

This SAE Standard includes complete general and dimensional specifications for those types of filler and drain plugs (shown in Figures 1 to 7 and Tables 1 to 3) having straight threads which are commonly used with gaskets or seals in automotive and related industrial applications.

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FITTING END ASSEMBLY, INTERNAL THREAD, RETAINED NUT, BEAM SEAL, DESIGN STANDARD

G-3, Aerospace Couplings, Fittings, Hose, Tubing Assemblies
  • Aerospace Standard
  • AS4209C
  • Current
Published 2019-12-26 by SAE International in United States

SCOPE IS UNAVAILABLE.

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Refrigeration Tube Fittings—General Specifications

Air Brake Tubing and Tube Ftg Committee
  • Ground Vehicle Standard
  • J513_201912
  • Current
Published 2019-12-19 by SAE International in United States
This SAE Standard covers complete general and dimensional specifications for refrigeration tube fittings of the flare type specified in Figures 1 to 42 and Tables 1 to 15. These fittings are intended for general use with flared annealed copper tubing in refrigeration applications. Dimensions of single and double 45 degree flares on tubing to be used in conjunction with these fittings are given in Figure 2 and Table 1 of SAE J533. The following general specifications supplement the dimensional data contained in Tables 1 to 15 with respect to all unspecified details.
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CONNECTOR ACCESSORIES, ELECTRICAL, BACKSHELL, ENVIRONMENTAL, CABLE SEALING, STRAIGHT, GROUNDING (WITHOUT STRAIN RELIEF), CATEGORY 1C (FOR AS50151 SOLDER TYPE, V THREAD OF AS310XX CLASSES A, B, C, OR K CONNECTORS, AS95234 CONNECTORS)

AE-8C1 Connectors Committee
  • Aerospace Standard
  • AS85049/1B
  • Current
Published 2019-12-19 by SAE International in United States
No Abstract Available.
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Influence of cutting fluid on reliability of threaded fastener joints

Atlas Copco Industrial Technique AB, Sickla Industrial 19, 1-Erik Persson
System and Component Design, Department of Machine Design, K-Mayank Kumar, Sergei Glavatskih
  • Technical Paper
  • 2019-01-2300
Published 2019-12-19 by SAE International in United States
This study reports on the effect of cutting fluids on friction behavior of the threaded fasteners. Underhead and thread friction are measured during tightening process of the hex-head threaded fasteners coated with different zinc-based coatings: electroplated zinc, zinc flake, and electroplated zinc nickel, commonly used in the automotive industry. The tests and data analysis are conducted considering ISO 16047 as a baseline. Test conditions are set close to the actual production conditions found in the motor vehicle industry. Water-based and ester-based cutting fluids are selected to unveil their impact on the reliability of the threaded fastener joints. It is shown that a change in the underhead interface conditions from dry to lubricated drastically reduces friction for the electroplated zinc and zinc nickel coatings.
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CONNECTOR ACCESSORIES, ELECTRICAL, BACKSHELL, ENVIRONMENTAL, CABLE SEALING, STRAIGHT, CATEGORY 1C (FOR AS50151 SOLDER TYPE, V THREAD OF AS310XX CLASSES A, B, C, OR K CONNECTORS, AS95234 CONNECTORS)

AE-8C1 Connectors Committee
  • Aerospace Standard
  • AS85049/2B
  • Current
Published 2019-12-19 by SAE International in United States
No Abstract Available.
This content contains downloadable datasets
Annotation ability available