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Viewing 1 to 30 of 21213
2017-06-05
Technical Paper
2017-01-1817
Steven M. Gasworth, Vasudev Nilajkar, Matteo Terragni
Abstract Polycarbonate (PC) glazing as a one-for-one glass replacement offers a 50% weight reduction, but exhibits several dB lower sound transmission loss (STL) in the low frequency range where tire and engine noise are dominant. In the high frequency range where wind noise is dominant, PC glazing offers an STL at least comparable to its glass counterpart, and an STL exceeding glass when this frequency range encompasses the glass coincidence frequency. However, a key value proposition of PC glazing is the opportunity for feature integration afforded by the injection molding process generally used for forming such glazing. Two-component (2K) molding fuses a second shot of plastic material behind, and along the perimeter of, the transparent PC first shot. This second shot can incorporate features and implement functions that require additional components attached or peripheral to a glass version.
2017-06-05
Technical Paper
2017-01-1809
Dhanesh Purekar
Abstract Engine noise is one of the significant aspects of product quality for light and medium duty diesel engine market applications. Gear whine is one of those noise issues, which is considered objectionable and impacts the customer’s perception of the product quality. Gear whine could result due to defects in the gear manufacturing process and/or due to inaccurate design of the gear macro and micro geometry. The focus of this technical paper is to discuss gear whine considerations from the production plant perspective. This includes quick overview of the measurement process, test cell environment, noise acceptance criteria considerations. A gear whine case study is presented based on the data collected in the test cell at the engine plant. Gear whine data acquired on current product and next generation of prototype engines is analyzed and presented. This paper concludes by highlighting the lessons learned from the case study.
2017-06-05
Technical Paper
2017-01-1815
Pranab Saha, Satyajeet P. Deshpande
Abstract This paper discusses the importance of a dissipative sound package system in the automotive industry and how it works. Although this is not a new technique at this stage, it is still a challenge to meet the subsystem target levels that were originally developed for parts based on the barrier decoupler concept. This paper reviews the typical construction of a dissipative system and then emphasizes the importance of different layers of materials that are used in the construction, including what they can do and cannot do. The paper also discusses the importance of the proper manufacturing of a part.
CURRENT
2017-05-22
Standard
AMS4302C
This specification covers an aluminum alloy in the form of sheet laminated with one or more layers of unidirectional aramid fiber/epoxy prepreg.
2017-05-20
Book
Rani Elhajjar
Additive Manufacturing of Aerospace Composite Structures: Fabrication and Reliability introduces the reader to the current state of technologies involved in processing and design of polymer-reinforced fiber composites using additive manufacturing’s automated fiber placement methods, through ten seminal SAE International papers. Currently, the material layup strategy in terms of process selection and manufacturability is usually not prioritized in the design phase. Engineers do not have a good way to see how their design choices can affect the manufacturing process beyond their initial structural-level considerations. The result is typically a large amount of experimental testing necessary to qualify the materials and structures typified in the classical building-block approach. Such an environment makes mistakes difficult to solve and, should redesign be required, obtaining reliable information is hard to piece together.
2017-05-19
Article
At Envisage, traditional coachbuilding skills blend with 3D printing and other digital tools to create concept/show vehicles and individual bespoke solutions.
CURRENT
2017-05-19
Standard
AMS4444E
This specification covers a magnesium alloy in the form of sand castings.
CURRENT
2017-05-18
Standard
AIR6130A
14-day material test to determine the cyclic effects of runway deicing compounds on cadmium plated parts.
2017-05-17
WIP Standard
AMS4365
This specification covers an aluminum alloy in the form of plate from 3.000 to 8.000 inches (76.2 to 203.2 mm) in thickness
2017-05-17
WIP Standard
AS2592A
This Aerospace Material Specification covers components of rotary flap assemblies, assembled by peening processors, to be used with portable equipment for peening of metal parts.
2017-05-16
Article
The In-Sight 7000 series from Cognex is a suite of ultra-rugged, highly modular standalone vision systems.
2017-05-16
Article
Now offered as part of Proto Labs' industrial 3D printing services, PolyJet technology provides product designers and engineers with the ability to manufacture elastomeric and overmolded prototypes without investing in tooling.
2017-05-16
WIP Standard
GA-G17AA
Add ASTM E 539
2017-05-10
WIP Standard
AMS4403A
This specification covers an aluminum alloy in the form of die forgings 12 inches (305 mm) and under in nominal thickness and of forging stock.
2017-05-10
WIP Standard
AMS4401B
This specification covers an aluminum alloy in the form of plate.
2017-05-10
WIP Standard
AMS4468A
This specification covers an aluminum alloy in the form of plate.
2017-05-10
WIP Standard
AMS4827F
This specification covers bearings of a leaded bronze cast on one or both faces of a steel backing.
2017-05-10
WIP Standard
AMS4820F
This specification covers bearings of leaded copper cast on one or both faces of a steel backing.
2017-05-10
WIP Standard
GA-E17AA
Setting tensile testing strain rate.
2017-05-10
WIP Standard
J1173
This specification covers the characteristics of glass beads used for peening, and provides for standard glass bead size numbers. The glass bead classification number is the approximate nominal diameter of the glass spheres in that classification, in hundredths of a millimeter, with the prefix GB added. Glass beads used for peening shall be made from high quality glass of the soda-lime type. They should be as resistant as possible to breakage from shock-impact, or by abrasion during shipment and handling. The particles should be substantially round, free-flowing, and free from chemical impurities or contaminants that might be detrimental to the workpiece.
2017-05-10
WIP Standard
J2597
This SAE Recommended Practice defines a procedure for the use of computer generated saturation curves to determine peening intensity. Calculation of intensity within a tolerance band for each data set in Table 1 one is required for compliance with this practice.
2017-05-10
WIP Standard
AMS4463A
This specification covers an aluminum alloy in the form of plate.
2017-05-10
WIP Standard
AMS4597B
This specification covers a copper-nickel-tin alloy in the form of bars and rods.
2017-05-10
WIP Standard
AMS4800F
This specification covers bearings of a tin alloy cast on one or both faces of a steel or bronze backing.
2017-05-09
WIP Standard
AMS4347E
This specification covers an aluminum alloy in the form of sheet from 0.020 to 0.249 inch (0.51 to 6.32 mm), inclusive, in thickness (See 8.5).
CURRENT
2017-05-09
Standard
AMS5046E
This specification covers two types of carbon steel in the form of sheet, strip, and plate.
2017-05-05
Article
Improvements to Airbus A320 passenger air nozzles could potentially contribute to program-wide benefits.
2017-05-05
Article
NASA has selected proposals for the creation of two multi-disciplinary, university-led Space Technology Research Institutes (STRIs) that will focus on the development of technologies critical to extending human presence deeper into our solar system. The new STRIs will bring together researchers from various disciplines and organizations to collaborate on the advancement of cutting-edge technologies in bio-manufacturing and space infrastructure.
2017-05-05
WIP Standard
AMS5523H
This specification covers a corrosion and heat-resistant steel in the form of sheet, strip, and plate.
Viewing 1 to 30 of 21213

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