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RETRACTION: Reengineering the Layout: A CMS Methodological Approach

SAE International Journal of Materials and Manufacturing

Laxminarayan Institute of Technology-Jayant Hemachandra Bhangale, Ashish Manohar Mahalle
  • Journal Article
  • 2014-01-9100.01
Published 2014-06-06 by SAE International in United States
SAE International has determined that the above referenced paper is almost entirely taken from a published PhD thesis, which was not cited or otherwise adequately acknowledged.
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Optimization of Multiple Quality Characteristics for Dry Drilling Ti-6Al-4V Using TiAlN-Coated Carbide Tool

SAE International Journal of Materials and Manufacturing

University of Missouri-Columbia-Akram Faqeeh, Ahmed Sherif El-Gizawy
  • Journal Article
  • 2014-01-9105
Published 2015-01-01 by SAE International in United States
The present paper aims at optimization of multiple quality characteristics (dimensional accuracy and surface roughness) in dry drilling Ti-6Al-4V using TiAlN-coated carbide tool while the controllable factors are spindle speed and feed rate. To do so, desirability methodology is used to explore optimum conditions for concurrent optimization of the addressed quality characteristics. Central composite design (CCD) is used for experimentation. In order to create reliable models describing the process behavior, response surface methodology (RSM) is used.
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Structural Analysis of an Engine Chassis for a Disc-Shaped Airship with Thrust Vector Control

SAE International Journal of Materials and Manufacturing

Modena and Reggio Emilia University-Mauro Madonia, Antonio Di Furia, Samantha Bonasia
Vrije Universiteit Brussel-Dean Vucinic
  • Journal Article
  • 2014-01-9102
Published 2015-01-01 by SAE International in United States
This paper presents a structural analysis of an engine chassis for a disc-shaped airship demonstrator. The objective was to verify such design solutions for application in the European Union's MAAT (Multibody Advanced Airship for Transport) project.In many airship designs, the engines are attached to the airship frame, located inside the balloon, in order to allow for thrust vector control. These airships have aerodynamic control surfaces to improve maneuverability.For the demonstrator, three engines are considered, with a non-rigid internal structure for their attachment. The engines are located on a horizontal plane (the symmetry plane of the balloon), with two lateral engines and one in front of the balloon.The chassis installation allows the engines to be attached either directly to the exterior envelope by using Kevlar connections, or to the central structural pipe. This chassis design has a simple construction, compared to typical structures addressed in the literature.The structures have a kinematic device based on a servomotor, which provides the torque to tilt the engine. The critical condition is defined with the vertical wind that varies the…
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Analytical Modelling of Diesel Powertrain Fuel System and Consumption Rate

SAE International Journal of Materials and Manufacturing

Salah A. Elmoselhy
International Islamic Univ Malaysia-Waleed Faris
  • Journal Article
  • 2014-01-9103
Published 2015-01-01 by SAE International in United States
Vehicle analytical models are often favorable due to describing the physical phenomena associated with vehicle operation following from the principles of physics, with explainable mathematical trends and with extendable modeling to other types of vehicle. However, no experimentally validated analytical model has been developed as yet of diesel engine fuel consumption rate. The present paper demonstrates and validates for trucks and light commercial vehicles an analytical model of supercharged diesel engine fuel consumption rate. The study points out with 99.6% coefficient of determination that the average percentage of deviation of the steady speed-based simulated results from the corresponding field data is 3.7% for all Freeway cycles. The paper also shows with 98% coefficient of determination that the average percentage of deviation of the acceleration-based simulated results from the corresponding field data under negative acceleration is 0.12 %. Under positive acceleration, the average percentage of deviation of the acceleration-based simulated results from the corresponding field data is 1.77 % with 93.5% coefficient of determination. The simulated results for all standard cycles show the developed models outperform…
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Development of High Strength, High Thermal Conductivity Cold Sprayed Coatings to Improve Thermal Management in Hybrid Motorcycles

SAE International Journal of Materials and Manufacturing

Università Degli Studi Guglielmo Marconi-Carlo Cavallini, Alessandro Giorgetti
Veneto Nanotech-Simone Vezzù, Silvano Rech, Enrico Vedelago
  • Journal Article
  • 2014-32-0044
Published 2014-11-11 by SAE International in United States
The deposition of thick, pore-free, high-performance copper alloy matrix composite coatings is a topic of interest for several industrial applications, including friction materials, high-strength electrical contacts, and welding electrodes, among others. This study investigates the use of cold spray to deposit CuCrZr/Al2O3 cermet coatings on aluminum alloy 6060. The objective is to integrate copper-based materials with aluminum-based materials, ensuring a high degree of mechanical and thermal contact, using a low temperature process that does not adversely affect the properties of the base materials. This technique can be used to produce integral coolers and aluminum-based bearings for automotive and motorcycle applications. Fused and crushed alumina and gas-atomized CuCrZr powder blends have been used as initial feedstocks, with compositional weight ratios of 65/35 and 80/20 (ceramic/metal). The coatings have been characterized in terms of microstructure and morphology, coating microindentation hardness, cohesion strength, and adhesion strength to the aluminum alloy substrate. Microindentation hardness greater than 200 Vickers, adhesion strength greater than 50 MPa, and cohesion strength up to 250 MPa have been obtained. Thermal conductivity up to 110…
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Correlation Measures and Their Applications in Structural Dynamics and Data Analyses

SAE International Journal of Materials and Manufacturing

Tenneco Automotive Co., Ltd.-Zhigang Wei
Tenneco Inc-Limin Luo, Shengbin Lin
  • Journal Article
  • 2014-01-2307
Published 2014-09-30 by SAE International in United States
This paper reviews the correlation concepts and tools available, with the emphasis on their historical origins, mathematical properties and applications. Two of the most commonly used statistical correlation indicators, i.e., modal assurance criterion (MAC) for structural deformation pattern identification/correlation and the coefficient of determination (R2) for data correlation are investigated. The mathematical structure of R2 is critically examined, and the physical meanings and their implications are discussed. Based on the insights gained from these analyses, a data scatter measure and a dependency measure are proposed. The applications of the measures for both linear and nonlinear data are also discussed. Finally, several worked examples in vehicle dynamics analysis and statistical data analyses are provided to demonstrate the effectiveness of these concepts.
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Fabrication of Graphite/PTFE Based Electrodes for Proton Exchange Membrane Fuel Cell

SAE International Journal of Materials and Manufacturing

Delhi Technological Univ.-Abhishake Goyal, Nadeem Yamin, Naveen Kumar
  • Journal Article
  • 2014-01-2433
Published 2014-09-30 by SAE International in United States
Fuel cells are a promising energy source on account of their high efficiency and low emissions. Proton exchange membrane fuel cells (PEMFC) are clean and environmental-friendly power sources, which can become future energy solutions especially for transport vehicles. They exhibit good energy efficiency and high power density per volume. Working at low temperatures (<90°C), hydrogen fuelled proton exchange membrane fuel cells (PEMFCs) are identified as promising alternatives for powering autos, houses and electronics. At the middle of the proton exchange membrane (PEM) fuel cell is the membrane electrode assembly (MEA). The MEA consists of a proton exchange membrane, catalyst layers, and gas diffusion layers (GDL). However, most of the researchers have already mentioned that PEMFC are not competitive enough to rechargeable lithium ion battery with respect to price because of the rare metal used such as platinum in it. Presence of platinum in PEM fuel cells is one of the reasons why fuel cells are excluded from commercialization. Therefore, reducing the amount of platinum used in fuel cells is very important for their commercialization. The…
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Amontons-Coulomb Friction Laws, A Review of the Original Manuscript

SAE International Journal of Materials and Manufacturing

Ecole Centrale de Lille, LML UMR CNRS-Yannick Desplanques
  • Journal Article
  • 2014-01-2489
Published 2014-09-28 by SAE International in United States
The ratio of two forces acting respectively perpendicular and normal to a contact surface of two bodies, the coefficient of friction, is widely used in engineering and science depicting the friction resistance of materials sliding over one another. Ruled by the so-called Amontons-Coulomb friction laws (independence from the load, the contact area and the sliding speed), this dimensionless quantity appears to be convenient for engineering and relatively easy to determine. Nevertheless, the use of tabulated friction coefficients becomes somewhat an issue to predict friction behavior of mechanical systems. The system dependence of friction is sometimes ignored, leading to misapplication. Moreover, the fundamental origins of sliding resistance are not as clear and care should be taken when attributing a fundamental significance to the friction coefficient. This paper aims to clarify findings on friction Charles Augustin Coulomb did and that have been used for hundred of years. At the demand of the French Académie Royale des Sciences calling for rules and accurate data to design machines, Coulomb developed an experimental study of friction of woods and metals…
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On Similarities and Differences of Measurements on Inertia Dynamometer and Scale Testing Tribometer for Friction Coefficient Evaluation

SAE International Journal of Materials and Manufacturing

Link Engineering-Carlos Agudelo
Tu Braunschweig-Nils Perzborn, Georg Peter Ostermeyer
  • Journal Article
  • 2014-01-2523
Published 2014-09-28 by SAE International in United States
Inertia dynamometers are commonly used to determine the friction coefficient of brake assemblies. Dynamometers are a well-established platform, allow testing under controlled conditions, exhibit a good correlation to many situations encountered in real driving, and are comparatively economical and less time-consuming than full vehicle test. On the other side of the spectrum is the use of scaled tribometer. These test systems make possible a test without the entire brake corner. This separation allows the investigation of the frictional-contact only (frictional boundary layer) speedily and independently of a given brake system or vehicle configuration. As the two test systems (inertia dynamometers and tribometers) may have different users with possibly different tasks, the question remains regarding how comparable the two systems are. These issues provide incentives to better define the fields of investigations, correlation, and applicability for the two systems.In order to provide further insights and learning on this topic, this paper focuses on the measurement of the friction coefficient and the wear behavior using inertia dynamometer and scaled pin-on-disc tribometer testing. Thus, friction coefficient levels and…
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Numerical Investigation of the Rivet Installation in an Adhesively Bonded Joint and the Load Transfer in a Bolted/Bonded Hybrid Joint

SAE International Journal of Materials and Manufacturing

Fraunhofer IFAM-Samuel Baha II
  • Journal Article
  • 2014-01-2242
Published 2014-09-16 by SAE International in United States
Hybrid (bolted/bonded) joining is becoming one of the innovative joining processes for light weight structures in the transport industry, especially in the aerospace industry where weight reduction and high joining requirements are permanent challenges. Combining the adhesive bonding with the mechanical joining -riveting for instance- can lead to an enhancement of the properties of the joint compared to the wide established riveting, as a result of a synergistic load bearing interaction between the fastener and the adhesive bondline. The influence of the rivet installation process on a hybrid joint regarding the joint stress state, the change of the bondline thickness as well as its effects on the joint performance and load transfer are some of the factors that drive the users to a better understanding of the hybrid joining process. This paper deals therefore on one hand with the numerical simulation of the rivet installation process in an adhesively bonded joint to understand the phenomena occurring during the installation process and on the other hand with the investigation of the load transfer depending on the…
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