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Standard

Test Method for Catalytic Carbon Brake Disk Oxidation

2013-12-04
WIP
AS6289
The scope of the test method is to provide stakeholders including fluid manufacturers, brake manufacturers, aircraft constructors, aircraft operators and airworthiness authorities with a relative assessment of the effect of deicing chemicals on carbon oxidation. This test is designed to assess the relative effects of runway deicing chemicals by measuring mass change of contaminated and bare carbon samples tested under the same conditions.
Standard

Condition Based Maintenance (CBM) Recommended Practices

2019-04-03
WIP
JA1013
The scope of this document is to clearly lay out the path for an organization to implement a CBM approach to maintenance. The practices will include both CBM in design and in the support phase for fielded equipment.
Standard

Landing Gear Based Weight and Balance Systems

2019-04-18
WIP
AIR6941
This document outlines historical systems which have used the landing gear as a sensor or installation point for full aircraft weight and balance systems. A number of systems have been developed, installed, certified, and placed in service but few systems remain in regular use. The document will capture the history of these systems, reasons (where known) for their withdrawal from service, and lessons learned.
Standard

Nitrogen Absorption/Desorption (Gas Dissolution) in Aircraft Shock Absorbers

2019-04-18
WIP
AIR6942
This document outlines the current state of the art in the understanding of gas in solution in shock absorber oils in unseperated shock absorbers. A literature review, overview of Henry's law, Henry's law coefficients for known gas and oil couples, in-service operational problems, lessons learned, and potential future work will be discussed in the document.
Standard

Composite Secondary and Tertiary Structure for Landing Gear

2019-04-29
WIP
AIR6827
This document will contain guidance and considerations for the use of composite materials on non-primary structure for landing gear systems. Content to include design considerations, conditions and applications where composites are feasible/beneficial, high-level descriptions of various manufacturing processes, and certification/validation considerations.
Standard

LED Replacement Light Sources for Halogen Light Sources

2017-06-28
WIP
J3145
This SAE Recommended Practice is intended as a guide for specifying LED Substitute Light Sources as Equivalents for corresponding RID filament light sources and is subject to change to keep pace with experience and technical advances. This document defines criteria for technical equivalence in order to make a substitution of a filament light source with an LED light source without compromising the performance of the RID device.
Technical Paper

New Materials and Experiences for the Industrialization of Pu Structural Rim Technology

1996-04-01
91A122
Processes involving use of reactive polymers received recently considerable attention also for producing components suitable for automotive structural applications. In particular polyurethane structural RIM technology seems to be the route of choice in terms of productivity, reliability and physico- mechanical performances in order to fit the automotive industry needs in the production of parts requiring superior load bearing properties. In this frame the development of long pot life snap-cure resins, fast and effective reinforcement preforming techniques as well as the development of computerized provisional processing methodologies are of paramount importance in view of industrialization of the technology. In this paper a description of the work carried out by Enichem Montedipe and Montedison is given. In particular a new family of PU systems, based on special isocyanate variants, is reported.
Technical Paper

Electrochromic Glazings for Use in Automobiles

1996-04-01
91A110
In the present paper we will outline the principles, designs, problems and benefits of electrochromic coatings and present our own laboratory results. The effect of electrochromic coatings on the thermal comfort of a parked vehicle is theoretically calculated and the results confronted with the performances of selective coatings.
Technical Paper

Multifunctional Glasses for Automotive

1996-04-01
91A109
The windows of a vehicle have to satisfy the following driver and passenger needs concerning visibility and climate perception both related to active safety: transparency, reluctance, dazzling, glare and diffused light (scattering). All functions are related to visibility and so to the optics of glazing, solar control, deicing, defogging, demisting. The task of material science is to find the multifunctional glasses solving simultaneously problems of visibility, safety and comfort. Particular kind of glasses, colored, wired, coated, electrochromic, liquid crystal, photochromic can be already considered solutions which can operate passively or actively. The example of passive solar control and active heatable coated glasses is shown as a possible practical multifunctional glass very soon.
Technical Paper

The Development of Plastic Lenses for Vehicle Headlamps

1996-04-01
91A111
The pending changes in European law enabling the use of plastic lenses on vehicle headlamps provide an opportunity for further advancement of vehicle styling, lighting performance and aerodynamic efficiency. Plastic lenses can also provide a useful weight saving and contribute to energy savings during the lifetime of the vehicle. This paper discusses the current requirements, technologies and solutions for plastic lenses, and indicates the way this advance can impact on the evolution of lighting products.
Technical Paper

Advances in Thermoset Injection Molding

1996-04-01
91A102
Injection molding of thermosetting materials such as low profile SMC/BMC composites found increasing application in the transportation industry in the eighties. Such automotive parts as front end panels and rear/hatchback doors have grown in usage. The rear doors have reached exceptional production levels of 2600/day in a single plant. The injection process offers the advantages of greater automation for the mass production of body panel parts compared in compression molding. However, the injection molding of fiber reinforced low profile composites suffers from a severe reduction in physical properties. This is particularly true for impact strength which can be one-third that of similar compression molding materials. A primary reason for this is due to the degradation of the reinforcement during the processing/molding. Efforts at increasing the physical properties through processing changes have many times caused problems with the surface smoothness of the moldings.
Technical Paper

Engineering Plastics for Novel Automotive Applications

1996-04-01
91A093
Not only have engineering thermoplastics secured an accepted place in automotive manufacture, but also their penetration of areas traditionally the sole domain of metals, is growing. One group of materials in particular is driving this trend; that of advanced thermoplastic composites. Used primarily in non-appearance, semi-structural parts, thermoplastic composites are opening the way for engineering polymers to be used in large components such as tailgates, technical fascia's or front end modules, side doors and bonnets, amongst many other novel applications whose engineering criteria could previously be met only by steel. This paper will look at both the new opportunities for engineering plastics in automotive applications and at the materials capable of economically satisfying their demands
Technical Paper

Structual Problems in the Design of a Car-Component in a Composite Material

1996-04-01
91A096
The paper summarizes the results of an experimental and numerical study performed on the rear door of a car of large production. It was carried out with a DMC ("dough molding compound") plastic material with short glass fibers. This technology makes strong the link between the production process and the mechanical properties of the component. Such properties really vary according to the fibers orientation, the distance from the injection points and the geometrical complexity of the different regions of the molded component. In some regions the fibers orientation is well defined, in others the orientation can be expressed only in average tendency terms, with a large scatter band. It is natural to think that the material modifies its behavior from region to region, showing marked orthotropic properties or, on the contrary, a compensation isotropic trend.
Technical Paper

Future Trends in Applications of Structural Composite for Automotive

1996-04-01
91A097
The paper outlines the future trends for structural applications of composite in automotive. RTM, SMC and S-RIM seem to be the most promising technologies in this field. Parts made with epoxy resins in resin transfer molding technology have very good mechanical properties that allow them to be suitable for chassis applications coupled with steel parts. The SMC compounded with Derakane resin shows very good qualities in terms of temperature resistance and a reasonable high volume of production. The last technology rising is the S- RIM that seems to be very promising because of its short cycle time coupled with mechanical properties. Several examples of applications of these different technologies are showed in the paper; some of those are already in production some others are in an advanced phase of development.
Technical Paper

Sound Quality of Impulsive Noises: An Applied Study of Automotive Door Closing Sounds

1999-05-17
1999-01-1684
This paper discusses four general attributes which quantify the character of an impulsive sound event. These attributes include the time duration, amplitude and frequency content of the impulsive noise. A three dimensional plot relating time, frequency and amplitude have been developed for the presentation of the measured data. This format allows graphic illustration of the noise event, providing fast interpretation and communication of the measured sound. Application of this methodology to the sound of an automotive door closing event is presented here. Representative door closing sound events are analyzed, with correlation presented between the attributes above to dynamic events of the physical hardware within the door and vehicle systems. Modifications of the door-in-white, internal door hardware, seal systems and additional content are investigated for their effect on the sound quality of the door closing event. Finally, recommended values for these attributes are presented.
Technical Paper

A New Wavelet Technique for Transient Sound Visualization and Application to Automotive Door Closing Events

1999-05-17
1999-01-1682
Transient automotive sounds often possess a complex internal structure resulting from one or more impacts combined with mechanical and acoustic cavity resonances. This structure can be revealed by a new technique for obtaining translation-invariant scalograms from orthogonal discrete wavelet transforms. These scalograms are particularly well suited to the visualization of complex sound transients which span a wide dynamic range in time (ms to s) and frequency (∼100Hz to ∼10kHz). As examples, scalograms and spectrograms of door latch closing events from a variety of automotive platforms are discussed and compared in light of the subjective rankings of the sounds.
Technical Paper

Door System Design for Improved Closure Sound Quality

1999-05-17
1999-01-1681
Door closing sounds are an important element of the craftsmanship image of a vehicle. This paper examines the relationship between closure sound quality and door system design. The perception of door closing sound quality is shown to be primarily related to it's loudness and sharpness. Of the two, sharpness is more important than loudness. Other factors, like ring-down may also affect closure sound quality. The door system is made up of a number of components. The most important in terms of sound quality are the door and body structure, latch, and door seals. Each of these are classified as either a sound source, a transmission path or a sound radiator. Methods for improving the design of these components for good closure sound quality are discussed in some detail.
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