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MANAGEMENT OF MANUFACTURING AND ASSEMBLY PROCESSES RISCS BASED ON MODIFIED FMEA

IRCUT-Galina Susova
National technology Chamber-Rostislav Sirotkin
  • Technical Paper
  • 2019-01-1870
To be published on 2019-09-16 by SAE International in United States
The quality of production is defined by the actual deviations from the requirements stated in design and technological documentation including drawings. In this article the problem of ensuring steady decrease in quantity of deviations from these requirements by production is considered. Carrying out preventive actions, in combination with control of time and costs of correction of discrepancies of such decrease it is possible to achieve. For the solution of an objective the method of the modified FMEA using parameters and levels of ranging as elements of operation of technological process where at a design stage of a product are set structure, is offered and are adjusted on the basis of feedback of production and operation. Such statement of a problem demands automation of collecting and data processing which can be used for creation of the knowledge base necessary for management of productions. Considering the specification level used in this analysis it is also possible to obtain the data necessary for the solution of some other the problems, for example, connected with productions, including technologies, the…
 

Simulation of aircraft assembly via ASRP software

Airbus-Elodie Bonhomme
SPbPU-Nadezhda Zaitseva, Tatiana Pogarskaia, Sergey Lupuleac, Olga Minevich, Julia Shinder
  • Technical Paper
  • 2019-01-1887
To be published on 2019-09-16 by SAE International in United States
ASRP (Assembly Simulation of Riveting Process) software is a special tool for modelling assembly process for large scale airframe parts. On the base of variation simulation, ASRP provides a convenient way to analyze, verify and optimize the arrangement of temporary fasteners. During the airframe assembly process certain criteria on the residual gap between parts must be fulfilled. The numerical approach realized in ASRP allows one to evaluate the quality of contact on every stage of the assembly process and solve verification and optimization problems for temporary fastener patterns. The paper is devoted to description of several specialized approaches that combine statistical analysis of measured data and numerical simulation using high-performance computing for optimization of fastener patterns, calculation of forces in fasteners needed to close initial gaps and identification of hazardous areas in junction regions.
 

Possibilities of wall heat transfer measurements at a supercharged Euro IV heavy-duty Diesel engine with high EGR-rates, an in-cylinder peak pressure of 250 bar and injection pressure up to 2500 bar

Daimler AG-Christian HENNES, Jürgen Lehmann
KIT Karlsruhe Institute Of Technology-Thomas Koch
  • Technical Paper
  • 2019-24-0171
To be published on 2019-08-15 by SAE International in United States
A raise of efficiency is, especially for CV, the strongest selling point concerning the TCO. Accompanied by legislations, with contradictive development demands, satisfying solutions have to be found. The analysis of energy losses in modern engines shows three influencing parameters. The losses resulting from taking real gas properties and non-ideal combustion into account have only a limited potential for gains, wall heat losses are currently believed to have the highest optimization potential. Critical for the occurrence of these losses is the wall heat transfer, which can be described by coefficients. To reduce WHT accompanying losses a decrease of energy transfer between combustion gas and combustion chamber wall is necessary. A measurement of heat fluxes is needed to determine the WHT relations at the combustion chamber of an engine. Methods to reduce the WHT can be developed and their effectiveness can be evaluated. As this is not done before for a heavy-duty engine, with peak pressures up to 250 bar, an increased in-cylinder turbulence and high EGR-rates is presented the following. The different methods to determine…
 
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Manufacturers' Identification of Aerospace Electrical and Electronic Wiring Devices and Accessories

AE-8C2 Terminating Devices and Tooling Committee
  • Aerospace Standard
  • AIR1351J
  • Current
Published 2019-06-13 by SAE International in United States

This SAE Aerospace Information Report (AIR) covers the general requirements for, and the listing of, manufacturers’ identification markings, names, symbols or trademarks, and CAGE codes that appear on electrical and electronic wiring devices and accessories as required by individual product specifications. Supplier markings from previous submitted listings are maintained for component traceability.

 
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Structure-Borne Path Identification of Rumbling Noise in a Passenger Car Based on In-Situ Blocked Force Transfer Path Analysis

Hyundai & Kia Corp.-Doohee Han
Hyundai Motor Group-Insoo Jung
Published 2019-06-05 by SAE International in United States
It is known that the major source of rumbling noise the combustion force of an engine. The combustion force excites the engine and induces vibrations of the powertrain. These vibrations are then transferred to the body of the vehicle via its structural transfer path. Moreover, the vibrations of the vehicle’s body emit internal vibra-acoustic noise. This noise is often referred to as the rumbling noise due to the structural borne path. If there are structural resonances among the structural paths such as the engine, transmission, mount bracket, suspension, and the vehicle’s body, the rumbling noise could be amplified. To identify the major resonances of the structural transfer path, classical transfer path analysis (CTPA) has been traditionally utilized. The method has a significant limitation in that it is necessary to decouple the substructures to obtain the contact force between individual components and to identify the transfer path of the structure-borne sound. Recently, blocked force transfer path analysis (BF-TPA) was introduced and this approach does not require the decoupling of the substructures. In this study, we identify…
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A Comparison of Near-Field Acoustical Holography Methods Applied to Noise Source Identification

Purdue University-Tongyang Shi, J Stuart Bolton
Published 2019-06-05 by SAE International in United States
Near-Field Acoustical Holography (NAH) is an inverse process in which sound pressure measurements made in the near-field of an unknown sound source are used to reconstruct the sound field so that source distributions can be clearly identified. NAH was originally based on performing spatial transforms of arrays of measured pressures and then processing the data in the wavenumber domain, a procedure that entailed the use of very large microphone arrays to avoid spatial truncation effects. Over the last twenty years, a number of different NAH methods have been proposed that can reduce or avoid spatial truncation issues: for example, Statistically Optimized Near-Field Acoustical Holography (SONAH), various Equivalent Source Methods (ESM), etc. Then, more recently, with the motivation of facilitating the measurement process, the principles of Compressive Sensing (CS) have been introduced in several studies to allow sound fields to be reconstructed based on a relatively small number of microphone measurements (thus making holographic measurements more practical and inexpensive), and these studies have shown promising results when used to identify sound source locations. In the present…
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Cleaner for Exterior Aircraft Surfaces Thickened or Gel-Type, Water-Base

AMS J Aircraft Maintenance Chemicals and Materials Committee
  • Aerospace Material Specification
  • AMS1523B
  • Current
Published 2019-06-03 by SAE International in United States
This specification covers a thickened, water-base, type cleaner in the form of a gel.
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PACKING, PREFORMED - MS28775 O-RING

A-6C2 Seals Committee
  • Aerospace Standard
  • AS28775A
  • Current
Published 2019-06-03 by SAE International in United States
No Abstract Available.
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Industrial Framework for Identification and Verification of Hot Spots in Automotive Composite Structures

SAE International Journal of Materials and Manufacturing

Chalmers University of Technology, Sweden-Leif E. Asp
Volvo Car Corporation, Sweden-Henrik Molker, Renaud Gutkin
  • Journal Article
  • 05-12-02-0009
Published 2019-05-16 by SAE International in United States
In this article, a framework for efficient strength analysis of large and complex automotive composite structures is presented. This article focuses on processes and methods that are compliant with common practice in the automotive industry. The proposed framework uses efficient shell models for identification of hot spots, automated remodelling and analysis of found hot spots with high-fidelity models and finally an automated way of post-processing the detailed models. The process is developed to allow verification of a large number of load cases in large models and still consider all potential failure modes. The process is focused on laminated composite primary structures. This article highlights the challenges and tools for setting up this framework.
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Standardized Symbols for Electrical Circuit Diagrams

Truck and Bus Electrical Systems Committee
  • Ground Vehicle Standard
  • J2221_201905
  • Current
Published 2019-05-16 by SAE International in United States
This SAE Recommended Practice identifies graphic symbols used in electrical circuit diagrams. The symbols aid troubleshooting electrical systems.
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