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Viewing 121 to 150 of 17295
2017-03-28
Journal Article
2017-01-0268
Venkatesh Babu, Richard Gerth
Friction Stir Processing (FSP) has been used to refine grain structure in sheet metals, and is based on friction stir welding (FSW) principles developed and patented by TWI Ltd, Cambridge, UK in 1991. In Friction Stir Processing (FSP) a tool generates heat from friction and pressure causing a material to become plastic without melting. The tool then mixes the base material in a circular motion as it traverses laterally through the material . It is possible to add 2D or 3D Nano particles to locally alter the material’s stiffness (young’s modulus). For example in, friction stirred TiB2 particles in cast iron resulted in over 2x hardness and wear resistance (by ASTM G35). Since FSP is not a forming process, the pattern of the ribs can be any 2D pattern (linear, circular, spiral, etc.). The main focus of the Nano-reinforced FSP is to achieve increased localized stiffness with minimal increase in density of the local material to achieve light weighting.
2017-03-28
Technical Paper
2017-01-0407
Fei Huo, Huyao Wu
Biomechanics and biodynamics are increasingly focused in the automotive industry to provide comfortable driving environment, reduce driver fatigue, and improve passenger safety. Man-centered conception is a growing emphasis on the open design of automobile. During the long term driving, occupational drivers are easily exposed to the neck pain, so it is important to reduce the muscle force load and its fatigue, which are not usually considered quantitatively during ergonomics design traditionally, hence relative standards are not well developed to guide the vehicle design; on the other hand, the head-neck models are always built based on the statics theory, these are not sufficient to predict the instantaneous variation of the posture and muscle force. In this paper, a head-neck model with multi DOFs is created based on multibody dynamics. Firstly, a driver-vehicle-road model considering driver multi-rigid body model, vehicle subsystems, and different ranks of pavement is built.
2017-03-28
Journal Article
2017-01-0378
Yuta Imanami, Kunikazu Tomita, Kazuaki Fukuoka, Kimihiro Nishimura
In order to develop a new carburizing steel material that realizes an intermediate heat treatment-free process in parts manufacturing, the cold forgeability of the as-rolled steel and suppression of abnormal grain growth of austenite were studied. It was shown that adjustment of Si, Mn and Cr, suppression of dynamic strain aging during cold forging, and an increase of ferrite by controlled rolling contribute to the reduction of deformation resistance. However, Nb precipitation control by fully utilizing mill manufacturing processes was also necessary for suppression of abnormal austenite grain growth. A new steel carburizing was developed by integrating these technologies, making it possible to eliminate annealing before cold forging and normalizing before carburizing simultaneously. Thus, the developed steel is an important innovation in the parts manufacturing process.
2017-03-28
Journal Article
2017-01-0367
Yueqian Jia, Yu-wei Wang, Yuanli Bai
A fully modularized framework was established to combine isotropic, kinematic, and cross hardening behaviors under non-monotonic loading conditions for advanced high strength steels. Experiments under two types of non-proportional loading conditions were conducted along different orientations, 1) uniaxial compression-tension reversal loading, and 2) two-step uniaxial tension, known as cross-loading conditions, with different pre-strains. The calibrated new model using AK Steel DP980 is decoupled between isotropic and kinematic hardening behaviors, and independent on both anisotropic yield criterion and fracture model. Good correlation was observed between experimental and modeled results. KEYWORDS: Constitutive Modeling, Advanced High Strength Steel, Isotropic Hardening, Kinematic Hardening, Cross Hardening, Non-linear Strain Path
2017-03-28
Journal Article
2017-01-0716
Randy Hessel, Zongyu Yue, Rolf Reitz, Mark Musculus, Jacqueline O'Connor
The goal of this paper is to present guidelines for interpreting soot natural luminosity images that are taken from within the combustion chamber of a single-cylinder research engine, which is fitted with a window in the piston-crown. In the experiments, fuel is injected near top-dead-center and luminosity from soot that forms as a result of the combustion process is imaged. Then, CFD simulations are run, from which soot luminosity and in-cylinder soot distributions are predicted. A luminosity to soot-distribution transfer function is developed from the CFD results and the transfer function is subsequently applied to the experimentally-obtained luminosity images in order to approximate soot distributions in the physical engine with improved accuracy. This method is applied to multiple operating conditions in order to develop the guidelines presented herein. Although this work builds on previous efforts, this is the authors’ first published work on this particular topic.
2017-03-28
Technical Paper
2017-01-1301
Deepak A. Patil, Hrishikesh Buddhe
Frontal collisions account for the majority of car accidents. This paper presents the energy absorption properties of hexagonal honeycomb structures of varying cellular geometries under frontal impact simulations. Honeycomb cellular meta-material structures offer many distinct advantages over homogenous materials because their effective material properties depend on both their constituent material properties and their geometric cell configuration. The effective static mechanical properties, such as the modulus of elasticity and rigidity and Poisson’s ratio, of honeycomb cellular meso-structures are control by variations of their cellular geometry. While the crushing responses in terms of energy absorption with different cellular shape observe a difference in the generalization of honeycombs with and varying geometric parameters. Unit assembly model technique is used to evaluate the performance vehicle in frontal load cases.
2017-03-28
Technical Paper
2017-01-1469
Tao Wang, Liangmo Wang, Jingxing Liu
To investigate the crashworthiness capacity of a M1 type commercial vehicle, the full-scale finite element (FE) model of the vehicle has been established. On basis of the FE model, the impact simulation subject to the 100% frontal impact has been carried out, and the results have been verified with the physical impact test. The analysis of the deformation path and the energy absorption indicates that the M1 vehicle lacks sufficient frontal deformation area and its peak crash acceleration (PCA) is too high, which raises a huge challenge for the sequent development of a safety restraint system. To enhance the crashworthiness of the M1 vehicle, some structural improvements have been implemented, with adding the energy absorbing box, improving the frontal frame parts and enhancing the front door. The frontal collapsing area has been investigated in order to figure out the layout position of the energy absorbing box.
2017-03-14
Book
This is the electronic format of the Journal.
2017-02-16
WIP Standard
AS4694C
Propose revision to add conductive high purity aluminum coating per MIL-DTL-83488 for aluminum alloy fittings. The W code aluminum parts with new finish will be distinguished by new finish code V at the end of part number.
2017-02-16
WIP Standard
AS4808C
SCOPE IS UNAVAILABLE.
2017-02-16
WIP Standard
ARP4737J
This document establishes the minimum requirements for ground based aircraft deicing/anti-icing Methods and procedures to ensure the safe operation of aircraft during icing conditions. This document does not specify requirements for particular airplane models. NOTE: Particular airline or aircraft manufacturers' published manuals, procedures, or methods supplement the information contained in this document.
2017-02-16
WIP Standard
6533
Fitting will be based on AS4224 except it will specify AS85720 only (5,000 PSI). Related project G3B16-08 will remove "dual" qualification requirements from AS4224 by removing AS85720 and leaving AS85421.
2017-02-16
WIP Standard
6534
Fitting will be based on AS4807 except it will specify AS85720 only (5,000 PSI). Related project G3B16-08 will remove "dual" qualification requirements from AS4807 by removing AS85720 and leaving AS85421.
2017-02-16
WIP Standard
6536
Fitting will be based on AS4808 except it will specify AS85720 only (5,000 PSI). Related project G3B16-08 will remove "dual" qualification requirements from AS4808 by removing AS85720 and leaving AS85421.
2017-02-16
WIP Standard
AS6535
Fitting will be based on AS4809 except it will specify AS85720 only (5,000 PSI). Related project G3B16-08 will remove "dual" qualification requirements from AS4809 by removing AS85720 and leaving AS85421.
2017-02-16
WIP Standard
AS6531
Fitting will be based on AS4221 except it will specify AS85720 only (5,000 PSI). Related project G3B16-08 will remove "dual" qualification requirements from AS4221 by removing AS85720 and leaving AS85421
2017-02-16
WIP Standard
AS6532
Fitting will be based on AS4222 except it will specify AS85720 only (5,000 PSI). Related project G3B16-08 will remove "dual" qualification requirements from AS4222 by removing AS85720 and leaving AS85421.
2017-02-16
WIP Standard
AS6529
Fitting will be based on AS4220 except it will specify AS85720 only (5,000 PSI). Related project G3B16-08 will remove "dual" qualification requirements from AS4220 by removing AS85720 and leaving AS85421.
2017-02-16
WIP Standard
AS6530
Fitting will be based on AS4211 except it will specify AS85720 only (5,000 PSI). Related project G3B16-08 will remove "dual" qualification requirements from AS4211 by removing AS85720 and leaving AS85421.
2017-02-16
WIP Standard
AS6528
Fitting will be based on AS4210 except it will specify AS85720 only (5,000 PSI). Related project G3B16-08 will remove "dual" qualification requirements from AS4210 by removing AS85720 and leaving AS85421.
2017-02-16
WIP Standard
AS4664D
Propose revision to add conductive high purity aluminum coating per MIL-DTL-83488 for aluminum alloy fittings. The W code aluminum parts with new finish will be distinguished by new finish code V at the end of part number.
CURRENT
2017-02-15
Standard
AS6554A
The purpose of this SAE Aerospace Standard (AS) is to standardize the basic design, performance, and testing requirements for “Cargo Stoppers” cargo tie-down accessories to be used in conjunction with approved restraint straps meeting AS5385C (TSO C-172) requirements. The lack of an agreed industry standard resulted in uncertainties about their operational capabilities so that it was deemed advisable to specify the applicable design, minimum performance, and testing requirements, since Cargo Stoppers are used as part of cargo tie-down arrangements that must meet regulatory airworthiness requirements.
CURRENT
2017-02-14
Standard
AMS1428/1
The foundation specification (AMS1428J) and the category specifications (AMS1428/1 and AMS1428/2) cover deicing/anti- icing materials in the form of a fluid.
2017-02-11
WIP Standard
AS6286/3A
Field of Application This document shall be used in conjunction with: AS6286 Training and Qualification Program for Deicing/Anti-icing of Aircraft on the Ground AS6286/1 Processes including Methods AS6286/2 Equipment AS6286/4 Weather AS6286/5 Health, Safety and First Aid AS6286/6 Aircraft Deicing/Anti-icing Diagrams, No-Spray-Zones
2017-02-11
WIP Standard
AS6286/2A
This document covers the standards of de-icing/anti-icing equipment. In conjunction with the main document and other related slash sheets it will provide guidelines for the proper procedures to deice and anti-ice aircraft on the ground information to support this training program is provided to make the material a better tool for the preparation and execution of the training & qualification. It is intended to provide a common basis for de-icing/anti-icing training and qualification for de- icing providers and airlines. This material was compiled using various international documents with support from SAE documents and individually contributed editorial comments. Its purpose is to serve as a “Globalized Deicing Training Manual”.
2017-02-11
WIP Standard
AS6286/6A
This document shall be used in conjunction with: - AS6286, Training and Qualification Program for Deicing/Anti-icing of Aircraft on the Ground - AS6286/1, Processes Including Methods - AS6286/2, Equipment - AS6286/3, Fluids - AS6286/4, Weather - AS6286/5, Health, Safety and First Aid
2017-02-11
WIP Standard
AS6286/5A
This document shall be used in conjunction with: AS6286 - Training and Qualification Program for Deicing/Anti-icing of Aircraft on the Ground AS6286/1 - Processes including Methods AS6286/2 - Equipment AS6286/3 - Fluids AS6286/4 - Weather AS6286/6 - Aircraft Deicing/Anti-icing Diagrams, No-Spray-Zones
2017-02-11
WIP Standard
AS6286A
This document establishes the minimum training and qualification requirements for ground based aircraft deicing/anti-icing methods and procedures. All guidelines referred to herein are applicable only in conjunction with the applicable documents. Due to aerodynamic and other concerns, the application of deicing/anti-icing fluids shall be carried out in compliance with engine and aircraft manufacturers’ recommendations. The scope of training should be adjusted according to local demands. There are a wide variety of winter seasons and differences of the involvement between deicing operators and the level and length of training should therefore be adjusted accordingly. However, the minimum level of training shall be covered in all cases. As a rule of thumb, each hour of classroom training should at least equal the same amount (or include more) of practical training wherever this is relevant. Both basic and recurrent practical training shall be performed and documented periodically.
Viewing 121 to 150 of 17295

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