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Standard
2014-05-06
This document is intended to facilitate calculation of O-Ring tension testing values.
Article
2014-05-01
Conti's new 48-V hybrid system is a package-efficient module aimed at delivering much of the functionality of a 200- to 400-V hybrid system for a fraction of the cost. It will enter production in 2016 at two OEMs.
Standard
2014-05-01
This specification covers insulated wire for use in external aircraft antennas.
WIP Standard
2014-05-01
No scope available.
Standard
2014-05-01
This SAE Aerospace Recommended Practice (ARP) contains methods used to measure the optical performance of airborne electronic flat panel display (FPD) systems. The methods described are specific to the direct view, liquid crystal matrix (x-y addressable) display technology used on aircraft flight decks. The focus of this document is on active matrix, liquid crystal displays (LCD). The majority of the procedures can be applied to other display technologies, however, it is cautioned that some techniques need to be tailored to different display technologies. The document covers monochrome and color LCD operation in the transmissive mode within the visual spectrum (the wavelength range of 380 to 780 nm). These procedures are adaptable to reflective and transflective displays paying special attention to the source illumination geometry. Photometric and colorimetric measurement procedures for airborne direct view CRT (cathode ray tube) displays are found in ARP1782. Optical measurement procedures for airborne head up displays (HUDs) can be found in ARP5287.
WIP Standard
2014-04-30
This specification covers all aspects in electrical wire interconnection systems (EWIS) from the selection through installation of wiring and wiring devices and optical cabling and termination devices used in aerospace vehicles. Aerospace vehicles include manned and unmanned airplanes, helicopters, lighter-than- air vehicles, missiles and external pods.
WIP Standard
2014-04-29
This document describes the various scuffing failure modes of the power cylinder system in an internal combustion engine. The causes and preventative measures for each failure mode are discussed.
Technical Paper
2014-04-28
Saral Bhanshali
Abstract This breakthrough development involves material conversion from aluminum die cast to polypropylene long fiber thermoplastic (40% long glass filled) for a two wheeler bracket of a leading automotive OEM. The plastic bracket was developed working in collaboration with the molder, glass supplier, technology collaborator and the OEM. The new part needed to be designed lighter in weight, easier to process and suitable for painting, outdoor exposure and stringent dynamic conditions. The scope of this study includes the evaluation of the new material from different viewpoints and comparison of the same with the existing material. The submission will go through the intricate analyses carried out in the development process and highlight the key advantages over aluminum. Studies will include static and dynamic analysis, fiber orientation studies, gate location studies, etc.
Technical Paper
2014-04-28
Ashok KK, Bade Simhachalam, Dhanooj Balakrishnan, Krishna Srinivas
Abstract In this paper, the application of tube Extrusion for the development of stepped tubular components is discussed. Thickness increase with respect to cold reduction of diameter is predicted with reasonable accuracy. Thickness increase, length increase and strain hardening coefficient for a given cold reduction of diameter of tube are obtained using LS-DYNA Software. True stress-plastic strain curves from the tensile test are used in the forming simulation using LS-DYNA. A special purpose machine is developed for the production of steering shaft components. Considerable reduction in weight is achieved by using stepped tubular components.
Technical Paper
2014-04-28
Shiva Kumar Manoharan, Christoph Friedrich
Abstract Self-loosening of bolted connections is a crucial failure mode for joints under transverse dynamic load. For some years, three dimensional finite element analysis has been enabled for avoiding experimental investigations of self-loosening. The aim of this paper is to emphasize the effect of joint design on the self-loosening of bolted connections, which is important for product development in early design stage. Joints consisting of internally threaded nut components are often heavier and stiffer as compared with light weight designs consisting of a separate nut. The difference of self-loosening is significant between arrangements with nut thread component and separate nut, although the design versions only contain slight modifications. Hence it is necessary to evaluate the effect of light weight design on self-loosening.
Technical Paper
2014-04-28
Shreyas Shingavi, Pankaj Bhirud, M. Nagi Reddy, Darshan Mishal
Abstract In Automotive world, different types of shield are used to safe guard the assembly from dirt and dust. These can deteriorate the performance and functioning of systems. Typically the dirt shields are not load carrying members, so preferred to have low gauges and low weight. Dirt shield has to cover many subassemblies, so it has intricate shape as well. Due to low gauge and complicated shape, the manufacturing of these shields becomes challenging in terms of maintaining assembly tolerances. In order to overcome these concerns, concurrent design approach is used. Using this approach manufacturing process of the parts is virtually simulated and residual stresses, strains, permanent set, spring back effect are evaluated. These results are cascaded to assembly load analysis, and results are monitored for deflections. Based on these results various interferences during actual assemblies or failure during assemblies like flushness can be predicted well in advance and design correction can be carried out at very early stage, resulting lower product development cost and time.
Technical Paper
2014-04-28
A. R. Kumbhar, S. A. Kulkarni, J. M. Paranjpe, N. V. Karanth
Abstract New process development of forging component require lot of process knowledge and experience. Even lots of trial-and-error methods need to be used to arrive at optimum process and initial billet dimensions. But with help of reliable computer simulation tools, now it is possible to optimize the complete process and billet dimensions without a single forging trial. This saves lot of time, energy and money. Additionally, simulation gives much more insight about the process and possible forging defects. In this paper, a complete forging process was needed to be designed for a complex component. With the help of computer simulation, the complete conventional forging process and modified forging process were simulated and optimized. Forging defects were removed during optimization of the process. Also billet weight optimization was carried out. Deciding the pre-forming shape of the billet was the main challenge. With use of computer simulation, an innovative pre-forming shape was arrived resulting in reducing billet input weight.
Technical Paper
2014-04-28
Ingrid Rasquinha, Reji Koshy Daniel
Abstract Environment, energy and safety concerns for vehicles have made improving strength-to-weight ratio of vehicles an imperative issue for the automobile industry. Tube hydroforming (THF) is an innovative forming technology, which can efficiently reduce the weight of a component or assembly, and at the same time, increase the part strength. THF produces parts with a high degree of part complexity (various cross-sections in a single piece) and dimensional stability. Tube hydroforming involves the expansion and sizing of tubes in a closed die under dynamic action of pressurized fluid, with simultaneous axial or radial compression. Best forming results can be achieved by the optimized combination of process parameters (internal pressure, feed, friction, load, blank thickness) and material properties (yield strength, tensile strength, n-value, r-value, elongation).With the help of case studies, this thesis presents how tube hydroforming has been used to shave mass off some conventionally produced auto components like chassis cross-members, trailing arms, crash members and exhaust housings.
Technical Paper
2014-04-28
M. J. Rathod, H. A. Deore
Abstract Desired mechanical properties including wear resistance at affordable price are the key parameters for which ductile cast irons are widely selected. Particularly, in many automobile applications like brake cylinders, camshafts, connecting rods, gears, pistons and yokes ductile iron is used. Traditionally surface heat treatments like induction hardening and in recent times electron beam and laser hardening are used to improve wear and fatigue resistance of ductile irons. However, the laser surface hardening has a lot of advantages over others such as low distortion due to high power density, flexibility, accuracy, lack of quenching medium and limited grain growth. In this work, laser surface hardening of Ferrito pearlitic ductile iron grade has been carried out. Hardening was performed with a 400W continuous wave fiber laser with the objective to investigate the effect of local tempering in continuous laser multi-pass laser surface hardening on hardness profile of the specimen.
WIP Standard
2014-04-27
This procurement specification covers aircraft-quality bolts and screws made of corrosion and heat resistant, age hardenable nickel base alloy of the type identified under the Unified Numbering System as UNS N07718.
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