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2016-07-25 ...
  • July 25-26, 2016 (8:30 a.m. - 4:30 p.m.) - Tysons, Virginia
  • December 1-2, 2016 (8:30 a.m. - 4:30 p.m.) - Troy, Michigan
Training / Education Classroom Seminars
The requirements for producing an FAA approved replacement part can be daunting. Understanding the steps required in the FAA Parts Manufacturer Approval (PMA) process can greatly streamline the approval life-cycle and reduce unnecessary costs and delays, thereby shortening the time and cost to market. This course is designed for those organizations and individuals interested in designing and manufacturing replacement parts for civil aviation aircraft. This two-day course covers the crucial subjects and steps of the FAA-PMA approval process.
2016-04-14
Event
These sessions are seeking abstracts that specifically address the development of polymeric and composite materials for automotive interiors and exteriors, powertrain components, as well as structural and non-structural applications. Focus is on design, processes, bonding and manufacturing technologies, as well as lightweighting strategies. Abstracts on the analysis of functional performance of these materials are encouraged.
2016-04-14
Event
These sessions are seeking abstracts that specifically address the development of polymeric and composite materials for automotive interiors and exteriors, powertrain components, as well as structural and non-structural applications. Focus is on design, processes, bonding and manufacturing technologies, as well as lightweighting strategies. Abstracts on the analysis of functional performance of these materials are encouraged.
2016-04-05
Technical Paper
2016-01-0518
Choonsoo Han
Thermoplastic polyester elastomer (TPEE) has the properties of both rubber and engineering plastic. The most important characteristics of this material are its high elasticity and rigidity. So, those properties are enable to high durability against fatigue and large deformation cycles. In this study, the rebound bumper of suspension system in vehicle, using thermoplastic polyester elastomer was conducted. The plastic elastomer rebound bumper allows cost reduction and light weight on by integrating several components, such as coil spring, spring guides, blocker, stop rubber etc. In order to satisfy several component requirements such as specific compression set and Load-Displacement curve etc, we evaluated the performance change according to the design and material of the component. This study shows that how to modify the design of the rebound bumper to meet the requirments, and to choose the optimum material through the verification comparing several materials.
2016-04-05
Technical Paper
2016-01-0512
Chae-Hwan Hong
A unique crystallization behavior of poly(L-lactide) (PLLA)/poly(D-lactide) (PDLA) stereocomplex(SC) was observed when a PLLA/PDLA blend was subjected to the specific melting conditions. We tried to blend PLLA and PDLA at overall compositions to form PLA stereocomplexes. Moreover, impact modifier and reinforcement materials such as talc and glass fiber were added to enhance the mechanical and thermal properties such as impact strength and HDT. As a result, we got one representative result, one composite recipe with HDT 115oC. For more economic technology, we tried to blend PLLA and Polypropylene at overall compositions and we got another representative result which could be applied to current PP/talc composites and ABS materials. The core technology of this might be the well dispersion of glass fibers into the matrix resin such as PP, PLLA and impact strength modifier. HDT value of this PP/PLA/GF composite increased over 150oC and impact strength also increased to 70 J/m.
2016-04-05
Technical Paper
2016-01-0839
Wenbin Yu, Wenming Yang, Balaji mohan, Kunlin Tay, Feiyang zhao, Yunpeng zhang, Siawkiang chou, Markus Kraft, Malcolm Andrew Alexander, Alfred Yong, Kwokhow Lou
In this study, the internal nozzle flow and macroscopic spray characteristics of a kind of wide distillation fuel (WDF) – kerosene were investigated both with numerical and experimental approaches. Simulation results indicate that compared with diesel fuel, kerosene cavitates more due to higher turbulent kinetic energy as a result of lower viscosity. The results from experiment indicate that under lower charge density, the spray penetration for kerosene is obviously shorter than that for diesel, especially for the lower injection pressure. This is because lower fuel viscosity results in a reduction in the size of the spray droplets, leading to lower momentum. However the spray angle of kerosene is larger compared with diesel due to stronger turbulence in the nozzle flow caused by increased cavitation for kerosene, which also accords well with the simulation results.
2016-04-05
Technical Paper
2016-01-1388
Baoke Huang, Jun Sun, Hu Wang, Xiaoyong Zhao, Qin Teng
In current design optimization of engine crankshaft bearing, only the crankshaft bearing is considered as the studying object. However, the corresponding relations of major structure dimensions exist between the crankshaft and the crankshaft bearing in engine, and there are the interaction effects between the crankshaft and the crankshaft bearing during the operation of engine. In this paper, the crankshaft-bearing system of a four-cylinder engine is considered as the studying object, the multi-objective design optimization of crankshaft bearing is developed. The crankshaft mass and the total frictional power loss of crankshaft bearings are selected as the objective functions in the design optimization of crankshaft bearing. The Particle Swarm Optimization algorithm based on the idea of decreasing strategy of inertia weight with the exponential type is used in the optimization calculation.
2016-04-05
Technical Paper
2016-01-1356
Can Li, Yadong Deng, Yuhua Xin
As a key component of airstream system equipped in the road sweeper, the structure of the suction nozzle determines the distribution of the internal flow field, which affects the dust-sucking efficiency and capability to a great degree. The goal of this research is to determine a better structure of the suction nozzle. Starting with an analysis of the one used in a certain type of road sweeper, the initial model of the suction nozzle is established, and the internal flow field is simulated with typical CFD software named FLUENT. Based on the simulation results, the dust-sucking capability of the initial structure is evaluated from the aspects of pressure and velocity distribution. Furthermore, in order to explore the influence of different structural parameters on the flow field distribution within the suction nozzle, models with different cavity heights and shoulder angles are established, and Univariate Method is used to analyze the contrast models.
2016-04-05
Technical Paper
2016-01-0801
Dimitri Seboldt, David Lejsek, Marlene Wentsch, Marco Chiodi, Michael Bargende
The growing transport sector and the associated environmental pollution due to combustion engine emissions raise public awareness with respect to the development of economical and low-emission propulsion systems. In the scope of this problem the use of CNG as fuel for internal combustion engines appears to be even more as the right choice compared to the conventional liquid fuels. Especially, the direct injection of natural gas provides a strong potential to establish this environmentally friendly propulsion. But due to the fact that this technology is not ready for series production there is still major need for research on a suitable injection system and mixture formation. Despite the fuel's gaseous state and the lack of evaporation the mixture preparation is made worse by the low mass density. This property leads to an enhanced jet deflection by the in-cylinder flow which is for itself extremely spatial and time dependent.
2016-04-05
Technical Paper
2016-01-0511
Na Qiu, Yunkai Gao, Jianguang fang, Shanshan Wang
As a potential material for lightweighting, PMMA has proven to perform well in optical behavior and weather resistance. However, the application in automotive glazing, especially rear window considering its large size has seldom been studied. This paper aims to investigate the defrost performance of PMMA rear window using both numerical and experimental methods. The finite element analysis results were found to be in good agreement with the experimental data. Based on the validated finite element model, we further optimized the defrost efficiency by changing the arrangement of heating line. The results demonstrated the frost layer on the version-related region of PMMA rear window can melt within 30 minutes, which meet the requirement of defrost efficiency.
2016-04-05
Technical Paper
2016-01-0508
Hyung Seok KIM
This study provides a tire puncture sealant including NR latex and acrylic emenrseion, which has a reduced viscosity at -40℃, and is also exellent storage stability at -40℃ to 70℃, initial sealaing performance. Also, this study provides device for sealaing inflatable objects. 'One- Piece Tire Repair Kit' can reduced weight and operation steps.
2016-04-05
Technical Paper
2016-01-1381
Jiaqi Li, Jimin Ni, Xiuyong Shi
Sealing system is an important subsystem of modern high-performance engine. Sealing system reliability directly affects the engine operating conditions. Cylinder head gaskets(CHG) sealing system is of the most importance to the engine sealing system, which is not only responsible for sealing chamber, the cooling fluid and lubricating oil passage, for preventing gas leakage, water leakage and oil leakage, but also for force transferring between cylinder head and cylinder body. Basing on nonlinear solution method, the sealing performance of multi-layer-steel cylinder head gaskets to a gasoline engine is studied with the finite element software ABAQUS. The deformations of the cylinder liners and engine block are also considered.
2016-04-05
Technical Paper
2016-01-0496
Leonardo Farfan-Cabrera, Ezequiel A. Gallardo
Debris are progressively generated through wear occurred by the interaction of various mechanical elements into engines, steering gear boxes, transmissions, differentials, etc. Besides, they can interfere with the normal operation of such components even generating more damage in other parts due to three-body abrasion. Hence, dynamic seals are devices susceptible to interact with such very fine debris concentrated in the working lubes. Recently, owing to many testing advantages, the micro-scale abrasion test has been extensively used to study three-body abrasion of hard materials, coatings, polymers, etc., however, it has not been applied for elastomeric materials assessment. The paper presents a study of three-body abrasion of an elastomeric dynamic seal (samples extracted from an automotive commercial Acrylonitrile-butadiene NBR rotary seal) under lubricated conditions by using a TE66 Micro-Scale Abrasion Tester.
2016-04-05
Technical Paper
2016-01-1348
Kenichi Higuchi, Fumihiko Toyoda, Hirohito Terashima, Shinji Ikeda, Eitaku Nobuyama
There are two design challenges of the flow path switching valve in a three-stage variable discharge oil pump. The first is to obtain the required discharge pressure characteristics and the other is to prevent hydraulic vibration. Therefore, we established technologies to determine the shape of the valve and the valve housing that resolve these two challenges. The technology to obtain the required discharge pressure characteristics solves equations that are statically true, such as the equations for the equilibrium of forces and hydraulic orifice. The hydraulic vibration control technology derives a differential equation that takes transient behavior, including oil elasticity and inertia, into account. Then, the equation is converted to a transfer function that indicates the valve behavior according to the input of oil pressure changes and then the stability criterion is applied to judge whether hydraulic vibration occurs or not.
2016-04-05
Technical Paper
2016-01-0507
Kazunori Miyake, Tomoya Nishida, Takanori Kurokawa, Hirokazu Arai
Sliding intermediate shaft of Electric Power Steering (EPS) system is used for torque transmission from steering wheel or motor and buffering reverse input from tire. Required performances of sliding intermediate shaft are lowering sliding loads and improvement of wear-resistance for prevention of rattle noise. Therefore, polyamide coating material with good sliding properties is treated in the sliding types of intermediate shaft. Conventionally, sliding types of intermediate shaft with polyamide coating have been used in vehicle interior. On the other hand, extension of applied area to engine room is needed. In that case use temperature rises from 80 ℃ to 120 ℃. However, in high temperature conditions, there is concerns about increase of friction coefficient and wear volume of polyamide by deterioration of sliding properties of polyamide. Therefore, improvement of sliding properties of polyamide in high temperature is necessary.
2016-04-05
Technical Paper
2016-01-0092
Stijn Kerst, Barys Shyrokau, Edward Holweg
Active safety systems can be made more efficient, more robust and less complex if wheel load information would be available. This data can be obtained via different methods as for instance wheel force transducers or ‘smart tyres’. Both approaches however have difficulties related to usage in active vehicle dynamics control. The first approach, based on strain measurements in the rim, is too expensive for series application whilst the latter, based on accelerometers inside the tire, suffers from difficulties regarding its estimation bandwidth. In this paper a novel approach for the determination of wheel loading is proposed. The novel approach, based on strain measurements on the surface of the bearing outer-ring, is tested on both a dedicated bearing test setup as well as on a test vehicle. As a case study, a pure load based Anti-lock Braking algorithm is tested, which demonstrates that the novel approach provides the accuracy and bandwidth needed for active vehicle dynamics control.
2016-04-05
Technical Paper
2016-01-0393
Kevin P. Barbash, William V. Mars
We demonstrate here an accounting of damage accrual under road loads for a filled natural rubber bushing. The accounting is useful to developers who wish to avoid the typical risks in development programs: either the risk of premature failure, or of costly overdesign. The accounting begins with characterization of the elastomer to quantify governing behaviors: stress-strain response, fatigue crack growth rate, crack precursor size, and strain crystallization. Finite Element Analysis is used to construct a nonlinear mapping between loads and strain components within each element. Multiaxial, variable amplitude strain histories are computed from road loads. Damage accrues in this reckoning via the growth of cracks. Crack growth is calculated via integration of a rate law from an initial size to a size marking end-of-life.
2016-04-05
Technical Paper
2016-01-1025
Daniela Cempirkova, Rostislav Hadas, Lukáš Matějovský, Rolf Sauerstein, Matthias Ruh
As emission regulations tighten across various regions of the world there is a growing trend in the use of alternative fuels such as Ethanol being blended with Gasoline. A notable case of Ethanol usage is found in South America with the widespread use of E100, which has no gasoline content and can often contain up to 10% water. Engine oil contamination by fuel is of major concern and under certain conditions can have negative effects on the durability of Turbocharger components which come into contact with contaminated oil, particularly sliding bearings, but also compressor wheels. The manner in which this effect takes hold can cause a decrease in the lubrication properties of the engine oil as well as a corrosiveness.
2016-04-05
Technical Paper
2016-01-1092
Gabriela Achtenova, Jiri Pakosta
In the laboratories of CTU in Prague was newly built an inertia test stand, dedicated mainly for endurance tests of the internal shift mechanisms. With regard to the instrumentation of the stand, it can be used also for determination of lost power of the not-loaded transmission. In the article will be published the values for the no-load losses measured during the different conditions (temperature, shifted speed, speed of rotation) on the automotive mechanical gearbox for the transversal disposition of the drivetrain. For the further usage of the measured values is important to determine the portion of the different sources of losses. We are mainly interested to recognise how big portion play the churning losses and losses in the sealing, while these two losses remain the same, whatever the load of the gearbox will be. The losses of bearings on input and secondary shaft were calculated with the tool available from SKF.
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