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Viewing 1 to 30 of 7264
2016-09-27
Technical Paper
2016-01-2090
Sergey Lupuleac, Margarita Petukhova, Julia Shinder, Alexander Smirnov, Mariia Stefanova, Nadezhda Zaitseva, Tatiana Pogarskaia, Elodie Bonhomme
Perspective way of solving the problem of aircraft assembly optimization is global simulation of junction process using efficient numerical algorithms. Specialized software complex [1] was developed within the framework of cooperation between Airbus SAS and Saint Petersburg Polytechnic University. This tool allows engineers to simulate the aircraft assembly process and solve the number of tasks: • Calculation of resulting gap under given initial disposition of riveted parts and distribution of fastening elements; • Determination of fastening element pattern that provides sufficient quality of assembly; • Shimming prediction; • Evaluation of stresses caused by assembly. The tool is based on special approach that necessitates solving contact problem arising when aircraft parts are being joined. This problem can be described by several simplifying assumptions such as ommiting tangential displacements and friction from consideration and creating substructure for junction area.
2016-09-27
Technical Paper
2016-01-2124
Sara Nilsson, Jonas Jensen, Mats Björkman, Erik Sundin
For the aerospace industry carbon fiber reinforced plastics (CFRP) is one of the fastest developing materials right now. The material has a strength-to-weight ratio that is several times higher than aluminium and steel, which makes it a great fit for applications where a low weight is crucial while maintaining strength and stiffness. It is specifically CFRP in pre-impregnated form, so called pre-preg, which has made its way into the aircrafts. Pre-preg is an anisotropic material that lets the designer control its properties to a high level of detail. Analogously to the material becoming used more widely in the aerospace industry the costs have decreased as the manufacturing methods have developed to follow the demands. However, how material and manufacturing method change the requirements and affect a product's design and performance can be hard to determine.
2016-09-27
Technical Paper
2016-01-2123
Matthias Busch
The integration of omega stringers to panels made of carbon fiber reinforced plastic (CFRP) by adhesive bonding, which are joined together in an autoclave, must be subject to high quality standards. Defects such as porosity, kissing bonds, voids or inclusion must be detected safely to guaranty the functionality of the component. Therefore, an inspection system is required to verify these bonds and detect different kinds of defects. In this contribution, the advantages of a robotic inspection system, which will be achieved through continuous testing, will be introduced. The testing method is the active thermography. The active thermography has major advantages compared with other non-destructive testing methods. Compared to testing with ultrasonic there is no coupling medium necessary, thus testing will be significantly enhanced.
2016-09-27
Technical Paper
2016-01-2130
Enkhsaikhan Boldsaikhan, Shintaro fukada, Mitsuo Fujimoto, Kenichi Kamimuki, Hideki Okada, Brent Duncan, Phuonghanh Bui, Michael Yeshiambel, Brian Brown, Alan Handyside
The Refill Friction Spot Joining (RFSJ) is an emerging solid-state spot welding technology that creates a molecular-level bond between the work-pieces through a thermo-mechanical processing. The RFSJ process does not consume any filler or foreign materials so that no additional weight is introduced to the assembly. As the solid-to-liquid phase transition is not involved in RFSJ in general, there is no fusion lack or material deterioration caused by liquefaction and solidification. Unlike the conventional friction stir spot welding, RFSJ produces a spot joint with a perfectly flush surface finish without a key or exit hole. Currently, the aerospace industry employs solid rivets for fastening the primary structures as they meet the baseline requirements and have well-established standards and specifications.
2016-09-27
Technical Paper
2016-01-8138
Pranav Shinde, Ravi K, Nandhini Nehru, Sushant Pawar, Balaji Balakrishnan, Vinit Nair
Body in white forms a major structure in any automobile. It is responsible in providing structural rigidity to vehicle, safety, frame and a skeleton to support all body parts of vehicle. When it comes to judge the performance of vehicle, BIW is analyzed not only for its strength and shape but also weight. Light weight BIW structures have seen to be developed rapidly in order to fulfill requirement of best vehicle performance in dynamic conditions. Since then lot of efforts have been put into CAE, materials research, advanced manufacturing process and joining methods, each plays a critical role in BIW functionality. Constructional designing, development of light materials with improved strength and special manufacturing practices for BIW are few research areas with never ending questions. This paper attempts to review various factors studied for weight reduction and solutions provided so far. Some of the major findings are briefly discussed and suggestions are made for future research.
2016-09-27
Technical Paper
2016-01-2105
Thomas G. Jefferson, Richard Crossley, Anthony Smith, Svetan Ratchev
This paper presents a novel reconfigurable assembly cell which can assemble multiple fuselage and wing variants. Most aerostructure assembly systems are designed to produce one variant only. For multiple variants, each assembly typically has a dedicated assembly cell, despite most assemblies requiring a process of drilling and fastening to similar tolerances. Assembly systems that produce more than one variant do exist but have long changeover or involve extensive retrofitting. Quick assembly of multiple products using one assembly system offers significant cost savings from reductions in NRC and lead time. Recent trends advocate Reconfigurable Assembly Systems (RAS) as a solution designed to have exactly the functionality necessary to produce a group of similar components. Components with similar geometries and processes are grouped into part families by iterating between design and manufacturing.
2016-09-27
Technical Paper
2016-01-2095
Agata Suwala, Lucy Agyepong, Andrew Silcox
Reduction of overall drag to improve aircraft performance has always been one of the goals for aircraft manufacturers. One of the key contributors to decreasing drag is achieving laminar flow on a large proportion of the wing. Laminar flow requires parts to be manufactured and assembled within tighter tolerance bands than current build processes allow. Drilling of aircraft wings to the tolerances demanded by laminar flow requires machines with the stiffness and accuracy of a CNC machine while having the flexibility and envelope of an articulated arm. This paper describes the development and evaluation of high accuracy automated processes to enable the assembly of a one-off innovative laminar flow wing concept. This project is a continuation of a previously published SAE paper related to the development of advanced thermally stable and lightweight assembly fixture required to maintain laminar flow tolerances.
2016-09-20
Technical Paper
2016-01-1979
William D. Bertelsen
Technology to create a VTOL for general aviation that is fast, efficient, easy to fly, and affordable, has proven elusive. Bertelsen Design LLC has built a large research model to investigate the potential of the arc wing VTOL to fulfill these attributes. The aircraft that is the subject of this paper weighs approximately 145 kg (320 lbs) and features coaxial, dual-rotating propellers, diameter 1.91 m (75 inches). Power is from an MZ-202 two-cycle, two-cylinder engine. Wingspan is 1.82 m (72 inches). The arc wing differentiates this aircraft from previous deflected-slipstream prototypes, which suffered from pitch-trim issues during transition. This paper will present configuration details of the Bertelsen model, showing how it is possible to generate high lift from a short-span wing system. The Bertelsen model can hover out of ground effect using just two arc-wing elements: a main wing and a “slat”.
2016-09-20
Technical Paper
2016-01-2055
Koji Muraoka, Daisuke Hirabayashi, Masayuki Sato, Yoshihisa Aoki
We have been conducting a research on a future commercial tilt wing VTOL transport under JAXA(Japan Aerospace Exploration Agency)'s "Sky Frontier" Program aiming to develop technologies for aircraft innovation. The research focuses on the QTW (Quad Tilt Wing) civil VTOL transport, which features tandem tilt wings with propellers mounted at the mid-span of each wing. Unlike current and previous tail rotors and twin-engine tilt wings, the quad tilt wing configuration does not require a tail rotor or a main rotor mechanism and would have advantages in cruise performance and payload carrying performances over them. In our previous research, we had developed fundamental technologies of the QTW aircraft such as tandem tilt wing design procedure, flight mechanics modeling, transition flight controllers and so on.
2016-09-20
Technical Paper
2016-01-2019
Richard P. Johnston
The author recently presented a technical paper describing an advanced BWB air frame capable of transporting a 75-ton military cargo half-way around the world and back without re-fueling. This paper will look at the flight and range characteristics of that air frame modified to transport a 150-ton military cargo. Limited NASA open literature prop data from the Hamilton-Standard CRP-X1 high Mach 1986 UTC testing will be applied to characterize the counter-rotating prop performance. Air frame propulsion will be provided by 4 sets of C/R propellers driven by 8 separate Advanced Variable Cycle Diesel (AVCD) engines turbo-compounded to 14,000 SHP for take-off. Some discussion of the possible interactive aerodynamics of the highly loaded propeller sets at low Mach using a simplified disk-actuator explanation will be made. Mission table results of air frame and engine, prop and fuel consumption characteristics will be presented as the flight proceeds.
2016-07-26 ...
  • July 26-27, 2016 (8:30 a.m. - 4:30 p.m.) - Troy, Michigan
Training / Education Classroom Seminars
Since the invention of the automobile, lighting has been an important subsystem on all ground vehicles. Automotive lighting is vital to passenger safety, comfort and vehicle styling. The technology used in automotive lighting has rapidly expanded to make the lighting more value added, safer and pleasing to customers. This seminar provides broad information about automotive lighting systems with emphasis on lighting functions, effectiveness, and technologies. The intent is to assist attendees to gain sufficient knowledge about automotive lighting and its importance in overall vehicle design and development.
2016-07-25 ...
  • July 25, 2016 (8:30 a.m. - 4:30 p.m.) - Troy, Michigan
Training / Education Classroom Seminars
It has not been commonly known that automotive exterior lights are safety devices and must comply with governmental regulations. Since the 1930s, the SAE Lighting Standards Committee has been actively working with the automotive industry OEMs, lamp makers, tier-two suppliers, and human factor experts to develop automotive lighting standards. These standards have been widely used or referenced by the U.S. federal or state governments in establishing and enforcing the lighting regulations.
2016-07-20
Standard
J2261_201607
This SAE Standard provides test procedures, requirements, and guidelines for stop lamps and turn signal lamps intended for use on vehicles 2032 mm or more in overall width. Stop lamps and front- and rear-turn signal lamps conforming to the requirements of this document may be used on vehicles less than 2032 mm in overall width.
2016-06-30
Standard
J3069_201606
This SAE Recommended Practice provides test procedures, performance requirements, and design guidelines for adaptive driving beam (ADB) and associated equipment.
2016-06-29
Standard
AMSG25667A
This specification covers monolithic glass for use in aircraft glazing. (see 6.1.)
Viewing 1 to 30 of 7264

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