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Viewing 1 to 30 of 14338
2017-04-04
Event
BE & D cover several important areas that are related to vehicle body, including its components such as instrument panel, steering column and wheel, seats, hood, decklid, transmission cross-member, hard mounted chassis, CRFM, etc. Topics included are: Novel concepts, Analysis, Design, Testing, Predictions of strength, stiffness, and fatigue life, welding methods, vehicle body quality, durability, reliability, safety, ride & handling, NVH, aerodynamics, mass reduction, as well as fuel economy.
2017-04-04
Event
Key words: residual stress, retained austenite, x-ray diffraction, neutron diffraction, induction hardening, carburizing, shot peening, quench and template, residual stress simulation, residual stress test
2017-04-04
Event
Focuses on innovative and improved fatigue methodologies and problem-solving techniques on automotive components, assemblies and vehicles based on material characterization, testing and CAE (Computer Aided Engineering) analysis.
2016-11-08
Technical Paper
2016-32-0020
Balasubramanian Thiruvallur Loganathan, Srivenkata Subramani Narasimhan, Lakshminarasimhan Varadha Iyengar, Ajith Kumar Sandur, Sudhagar Vediappan
Development of small air cooled motorcycles is ever challenging due to combination of customer expectation, regulatory requirements and cost factors. Achieving higher performance and emission standards means higher engine and parts operating temperature. Under these changes meeting durability targets at reasonable cost needs good understanding of material, surface treatment and tribological aspects. In this paper some of the surface and process improvements done to reduce wear in engine valves is discussed in detail. Design of engine valves shall ensure meeting thermal, mechanical strength requirements wear and durability targets. Surface treatments, coating, surface finish and also use of special materials in tip, valve stem, seat ensures higher durability; low wear in valve and interfacing parts. During new engine development process verification tests, wear observed in valve stem- valve guide, valve tip- screw interface.
2016-10-17
Journal Article
2016-01-2204
Takafumi Mori, Masanori Suemitsu, Nobuharu Umamori, Takehisa Sato, Satoshi Ogano, Kenji Ueno, Oji Kuno, Kotaro Hiraga, Kazuhiko Yuasa, Shinichiro Shibata, Shinichiro Ishikawa
One effective and easy way to improve fuel economy for automobiles is to decrease viscosity of lubricants, as it brings less churning loss. However, this option creates a higher potential for thinner oil film, which could damage the mechanical parts. This paper describes a new low-viscosity gear oil technology which was successfully developed to improve wear at tapered-roller bearings in differential gear units, whereas achieving higher fuel economy performance. As for tapered-roller bearings in differential gear units protected by gear oils, one major damage is supposed to cause wear at large end face of rollers and the counterpart, so-called bearing bottom wear. In order to understand the wear mechanism, wear at rolling contact surface of rollers and the counterparts, so-called bearing side wear was additionally observed to confirm the wear impact on tapered-roller bearing.
2016-10-17
Journal Article
2016-01-2205
Chris McFadden, Kevin Hughes, Lydia Raser, Timothy Newcomb
Hybrid drivetrain hardware combines an electric motor and a transmission, gear box, or hydraulic unit. With many hybrid electric vehicle (HEV) hardware designs the transmission fluid is in contact with the electric motor, and so some OEMs and tier suppliers have concerns about the electrical properties of automatic transmission fluids (ATFs). Lubrizol has conducted a fundamental research project to better understand the electrical conductivity of ATFs. In this paper we will present conductivity data as a function of temperature for a range of commercially available lubricants, including engine oils and gear oils, in addition to ATFs. All fluids, regardless of type, had conductivities in the range of 1E-8 to 1E-10 S/cm at 100oC and as such are good insulators with the ability to dissipate static charge. Next we will deconstruct one ATF to show the relative impact of the various classes of lubricant additives.
2016-10-17
Technical Paper
2016-01-2350
Zhien Liu, Jiangmi Chen, Sheng-hao Xiao
This paper combines fluid software STAR-CCM+ and finite element software ABAQUS to stimulate the internal field of this Gasoline engine exhaust manifold based on the theory of loose coupling. Through the simulation of car parking cooling - full load condition at full speed, we estimate thermal fatigue life of the exhaust manifold with the plastic strain increment as the evaluation parameters. Results shows that the manifold satisfies the target life performance. Here we also made a consideration about the how the bolt force affects the manifold elastic and plastic material behavior.
2016-09-27
Technical Paper
2016-01-8027
Stefan Steidel, Thomas Halfmann, Manfred Baecker, Axel Gallrein
Abstract Rolling resistance and tread wear of tires do particularly influence the maintenance costs of commercial vehicles. Although tire labeling is established in Europe, it is meanwhile well-known that, due to the respective test procedures, these labels do not hold in realistic application scenarios in the field. This circumstance arises from the development phase of tires, where the respective performance properties are mainly evaluated in tire/wheel standalone scenarios in which the wide range of usage variability of commercial vehicles cannot be considered adequately. Within this article we address a method to predict indicators for rolling resistance and tread wear of tires in realistic application scenarios considering application-based factors of influence like specific customers, operation circumstances, regional dependencies, fleet specific characteristics etc.
2016-09-27
Technical Paper
2016-01-8044
Guoyu Feng, Wenku Shi, Henghai Zhang, Qinghua Zu
Abstract In order to predict the fatigue life of thrust rod heavy duty commercial vehicle balanced suspension, based on the continuum mechanics theory, the fatigue life prediction model of rubber with equivalent effect as damage parameter is established. Based on the equivalent stress and fatigue cumulative damage theory, the fatigue damage evolution equation of rubber material expressed by stress is derived by using the strain energy function. The general fatigue life model is established by using the maximum logarithmic principal strain as the damage parameter. The finite element model of the thrust rod is established, and the stress distribution of the spherical hinge rubber layer and the easy damage area are analyzed. Based on the equivalent stress calculation results and the axial tension stress and strain data of the rubber material, the accuracy of the results of the finite element calculation is verified.
2016-09-27
Technical Paper
2016-01-2142
Pavel Lykov PhD, Artem Leyvi, Rustam M. Baytimerov, Aleksei Doikin, Evgeny Safonov
Abstract The treatment of solid surface by powerful streams of charged particles accelerated with power density ≥106 W/cm2 widely used for modification of different materials properties. The fast enter of electron beam power in the material of target causes the flow intense thermal and deformation processes. The changing of the structure, the phase composition, the microrelief of treated surface consequently happens. It is often accompanied by the hardening and increase of the wearing properties. The work proposed of using low-energy high-current electron beam as finish treatment of product obtained by selective laser melting of heat-resistant nickel alloy EP648. The subject of research was the surface properties of the product.
CURRENT
2016-09-22
Standard
AMS3731/1C
This specification covers a unfilled, room-temeperature-polymerizing epoxy resin formulation, supplied as a two-component system.
CURRENT
2016-09-22
Standard
AMS3731/2D
This specificiation covers a filled epoxy resin formulation, supplied as a two-component system, requiring an oven cure for attainment of maximum properties.
CURRENT
2016-09-22
Standard
AMS3731/3C
This specification covers an epoxy resin formulation with fillers such as calcium carbonate, supplie as a two-component system, requiring an oven cure for attainment of maximum properties.
CURRENT
2016-09-22
Standard
AMS3731/4C
Requiring an oven cure for attainment of maximum properties.
CURRENT
2016-09-22
Standard
AMS3731/5C
This specification covers a filled, room-temperature-polymerizing epoxy resin formulation, supplied as a two-component system.
CURRENT
2016-09-22
Standard
AMS3731/6C
This specification covers a glass or silica micosphere-filled epoxy resin formulation, supplied as a two-component system, requiring an oven cure for attainment of maximum properties.
CURRENT
2016-09-22
Standard
AMS3731/7C
This specification covers a filled, room-temperature-polymerizing epoxy resin formulation, supplied as a two-component system.
CURRENT
2016-09-22
Standard
AMS3731/9C
This specification covers a flexibilized epoxy resin formulation, supplied as a two-component system, requiring an oven cure for attainment of maximum properties.
CURRENT
2016-09-22
Standard
AMS3731/8C
This specification covers an epoxy resin formulation supplied as a two-component system, requiring an oven cure for attainment of maximum properties.
CURRENT
2016-09-22
Standard
AMS3731C
This specification and its supplementary detail specifications cover epoxy resin formulations based on diglycidyl ether of bisphenol A with an epoxide equivalent of 175-195. When properly mixed and cured, these resisns produce a rigid or flexible product.
CURRENT
2016-09-22
Standard
AMS6354G
This specification covers a low-alloy steel in the form of sheet, strip, and plate 4.00 inches (101.6 mm) and under in thickness.
CURRENT
2016-09-22
Standard
AMS6455L
This specification covers an aircraft-quality, low-alloy steel in the form of sheet, strip, and plate.
2016-09-21
WIP Standard
AMS5132L
This specification covers a high-carbon steel in the form of bars.
CURRENT
2016-09-20
Standard
AMS4970K
This specification covers a titanium alloy in the form of bars, wire, forgings up to 4.000 inches (101.60 mm) inclusive and forging stock.
CURRENT
2016-09-20
Standard
AMS4625H
This specification covers one type of bronze in the form of bars and rods of any size, and tubing over 1.00 inches (25.4 mm) in nominal outer diameter (see 8.5).
2016-09-20
Journal Article
2016-01-2022
Ajay Rao, Vivek Karan, Pradeep Kumar
Abstract Turbulence is by far the number one concern of anxious passengers and a cause for airline injuries. Apart from causing discomfort to passengers, it also results in unplanned downtime of aircrafts. Currently the Air Traffic Control (ATC) and the meteorological weather charts aid the pilot in devising flight paths that avoid turbulent regions. Even with such tailored flight paths, pilots report constant encounters with turbulence. The probability of turbulence avoidance can be increased by the use of predictive models on historical and transactional data. This paper proposes the use of predictive analytics on meteorological data over the geographical area where the aircraft is intended to fly. The weather predictions are then relayed to the cloud server which can be accessed by the aircraft planned to fly in the same region. Predictive algorithms that use Time series forecasting models are discussed and their comparative performance is documented.
2016-09-19
WIP Standard
AMS6511B
This specification covers a premium aircraft-quality steel in the form of bars, forgings, mechanical tubing, flash welded rings, and stock for forging or flash welded rings.
Viewing 1 to 30 of 14338

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