Terms:
SAE International Journal of Materials and Manufacturing
AND
8
Show Only

Collections

File Formats

Content Types

Dates

Sectors

Topics

Authors

Publishers

Affiliations

Events

   This content is not included in your SAE MOBILUS subscription, or you are not logged in.

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.
Annotation ability available
   This content is not included in your SAE MOBILUS subscription, or you are not logged in.

Volumetric and Dynamic Performance Considerations of Elastomeric Components

SAE International Journal of Materials and Manufacturing

Ohio State University-Scott Allen Noll, Benjamin Joodi, Jason Dreyer, Rajendra Singh
  • Journal Article
  • 2015-01-2227
Published 2015-06-15 by SAE International in United States
Elastomeric joints such as mounts and suspension bushings undergo broadband excitation and are often characterized through a cross-point dynamic stiffness measurement; yet, at frequencies above 100 Hz for many elastomeric components, the cross- and driving-point dynamic stiffness results significantly deviate. An illustrative example is developed where two different sized mounts, constructed of the same material and are shaped to achieve the same static stiffness behavior, exhibit drastically different dynamic behavior. Physical insight is provided through the development of a reduced order single-degree-of-freedom model where an internal resonance is explained. Next, a method to extract the parameters for the reduced order model from a detailed finite element bushing model is provided. Further, a new benchmark experiment is used to validate the simulated behavior and provide insight into certain frequency dependent behavior where internal elastic modes of elastomeric component are present. Finally, the effect of the internal resonance is examined within the context of a hybrid vibro-acoustic vehicle system model. It is demonstrated that the internal mount resonance exhibits a significant influence on the sound pressure sensitivity…
Annotation ability available
   This content is not included in your SAE MOBILUS subscription, or you are not logged in.

Comparative Assessment of Frequency Dependent Joint Properties Using Direct and Inverse Identification Methods

SAE International Journal of Materials and Manufacturing

Ohio State University-Benjamin Joodi, Scott Allen Noll, Jason Dreyer, Rajendra Singh
  • Journal Article
  • 2015-01-2229
Published 2015-06-15 by SAE International in United States
Elastomeric joints are utilized in many automotive applications, and exhibit frequency and excitation amplitude dependent properties. Current methods commonly identify only the cross-point joint property using displacement excitation at stepped single frequencies. This process is often time consuming and is limited to measuring a single dynamic stiffness term of the joint stiffness matrix. This study focuses on developing tractable laboratory inverse experiments to identify frequency dependent stiffness matrices up to 1000 Hz. Direct measurements are performed on a commercial elastomer test system and an inverse experiment consisting of an elastic beam (with a square cross section) attached to a cylindrical elastomeric joint. Sources of error in the inverse methodology are thoroughly examined and explained through simulation which include ill-conditioning of matrices and the sensitivity to modeling error. The identified translational dynamic stiffness and loss factor values show good agreement between the two identification methods, though challenges remain for the rotational and coupling stiffness terms. The experimental methods are applied to two different elastomeric materials of the same geometry.
Annotation ability available
   This content is not included in your SAE MOBILUS subscription, or you are not logged in.

Determination of the Transfer Matrix for Isolators Using Simulation with Application to Determining Insertion Loss

SAE International Journal of Materials and Manufacturing

University of Kentucky-Shishuo Sun, David W. Herrin, John Baker
  • Journal Article
  • 2015-01-2226
Published 2015-06-15 by SAE International in United States
Transmissibility is the most common metric used for isolator characterization. However, engineers are becoming increasingly concerned about energy transmission through an isolator at high frequencies and how the compliance of the machine and foundation factor into the performance. In this paper, the transfer matrix approach for isolator characterization is first reviewed. Two methods are detailed for determining the transfer matrix of an isolator using finite element simulation. This is accomplished by determining either the mobility or impedance matrix for the isolator and then converting to a transfer matrix. It is shown that results are similar using either approach. In both cases, the isolator is first pre-loaded before the transfer matrix is determined. The approach to find isolator insertion loss is demonstrated for an isolator between two plates, and the effect of making changes to the structural impedance on the machine side of the isolator by adding ribs is examined. After which, the value of isolator insertion loss as a metric is examined for a case where multiple isolators are used on a construction cab. The…
Annotation ability available
   This content is not included in your SAE MOBILUS subscription, or you are not logged in.

Modeling and Characterization of a Novel Porous Metallic Foam Inside Ducts

SAE International Journal of Materials and Manufacturing

Ain Shams University-Maaz Farooqui, Tamer Elnady
Scania AB-Ragnar Glav
  • Journal Article
  • 2015-01-2203
Published 2015-06-15 by SAE International in United States
A novel porous metallic foam has been studied in this work. This composite material is a mixture of resin and hollow spheres. It is lightweight, highly resistive to contamination and heat, and is capable of providing similar or better sound absorption compared to the conventional porous absorbers, but with a robust and less degradable properties. Several configurations of the material have been tested inside an expansion chamber with spatially periodic area changes. Bragg scattering was observed in some configurations with certain lattice constants. The acoustic properties of this material have been characterized from the measurement of the two-port matrix across a cylindrical sample. The complex density and speed of sound can be extracted from the transfer matrix using an optimization technique. Several models were developed to validate the effect of this metallic foam using Finite Elements and the Two-port Theory. There was a good agreement between both models and the measurement results.
Annotation ability available
   This content is not included in your SAE MOBILUS subscription, or you are not logged in.

Comparative Study of ANN and ANFIS Prediction Models For Turning Process in Different Cooling and Lubricating Conditions

SAE International Journal of Materials and Manufacturing

Faculty of Mechanical Engineering-Branislav Sredanovic, Djordje Cica
  • Journal Article
  • 2015-01-9082
Published 2015-05-01 by SAE International in United States
The most efficient way to reduce friction and heat generation at the cutting zone is to use advanced cooling and lubricating techniques. In this paper, an experimental study was performed to investigate the capabilities of conventional, minimal quantity lubrication (MQL) and high pressure cooling (HPC) in the turning operations. Process parameters (feed, cutting speed and depth of cut) are used as inputs to the developed artificial neural network (ANN) and the adaptive networks based fuzzy inference systems (ANFIS) model for prediction of cutting forces, tool life and surface roughness. Results obtained by the models have been compared for their prediction capability with the experimentally determined values and very good agreement with experimental results was observed.
Annotation ability available
   This content is not included in your SAE MOBILUS subscription, or you are not logged in.

Implementing the Hybrid Lean-Agile Manufacturing System Strategically in Automotive Sector

SAE International Journal of Materials and Manufacturing

Salah A. Elmoselhy
  • Journal Article
  • 2015-01-9083
Published 2015-05-01 by SAE International in United States
In order to strike a balance between cost and availability, the present study presents the strategic implementation of the hybrid lean-agile manufacturing system. The proposed implementation is based on literature review and statistical analysis. The study presents short term and long term proposed plans for implementing this newly developed system in a sustainable way. It shows how the strategic facet of the hybrid lean-agile manufacturing system addresses the key manufacturing competitive dimensions. The paper presents as well a cost-benefit analysis in comparison with the lean manufacturing system and agile manufacturing system based on the net present value. The study shows that the expectedly most efficient among the manufacturing systems is the Hybrid Lean-Agile Manufacturing System with normalized comparative improvement of about 58% and 42%, respectively. The study concludes through a statistical sample that about one third of the variation in successfully dealing with the sources of competitive advantage in automotive sector can be explained by adopting the strategic facet of the hybrid lean-agile manufacturing system. The study is limited to the automotive manufacturing sector. The…
Annotation ability available
   This content is not included in your SAE MOBILUS subscription, or you are not logged in.

Thermal and Structural Analysis of Functionally Graded NiCrAlY/YSZ/Al2O3 Coated Piston

SAE International Journal of Materials and Manufacturing

Srivathsan Puzhuthivakkam Rengarajan, Vignesh Natarajan, Harikrishnan Kanagasabesan
College Of Engineering Chennai-Terrin P Babu
  • Journal Article
  • 2015-01-9081
Published 2015-05-01 by SAE International in United States
Functionally Graded Thermal Barrier Coatings (FG-TBC) increases the performance of high temperature components in gasoline engines by decreasing the thermal conductivity and increasing the unburned charge oxidation in the flame quenching area with the increase in temperature near the entrance of the crevice volume between the piston and the liner during the compression and the early part of the expansion strokes.In this study, a 3-D finite element steady state thermal and structural analysis are carried out on both uncoated and functionally graded NiCrAlY/YSZ/Al2O3 coated gasoline engine piston using a commercial code, namely ANSYS. The effects of coating on the thermo mechanical behaviours of the piston are investigated. It has been shown that the maximum surface temperature of the ceramic coated piston is improved approximately by 7% for the Al-Si alloy. The application of TBC enhances the Von Mises stress withstanding capacity approximately by 15% than the uncoated piston due to maximum temperature difference and difference in thermal expansion coefficients within the ceramic layers.
Annotation ability available
   This content is not included in your SAE MOBILUS subscription, or you are not logged in.

Application of the Fourier Amplitude Sensitivity Test (FAST) to Analyze Thermal Performance of Vehicle Underbody Components

SAE International Journal of Materials and Manufacturing

Univ of Windsor-Ashley Lehman, Vesselin Stoilov, Andrzej Sobiesiak
  • Journal Article
  • 2015-01-0438
Published 2015-04-14 by SAE International in United States
This paper describes the application of the Fourier Amplitude Sensitivity Test (FAST) method [1] to investigate the effect of uncertainty in design parameters on the thermal system performance of vehicle underbody components. The results from this study will pinpoint the design parameters which offer the greatest opportunity for improvement of thermal system performance and reliability. In turn, this method can save engineering time and resources.An analytical model was developed for a vehicle underbody system consisting of a muffler, heat shield, and spare tire tub. The output from this model was defined as the temperature of the spare tire tub. The majority of the input parameters in this model deviate from their nominal values due to environmental factors, wear and ageing, and/or variation in the manufacturing process. Using MATLAB software package, the model was simulated with input parameters which were simultaneously and sinusoidally varied at distinct frequencies over their respective uncertainty ranges.Finally, the Fourier transform was applied to the output of the model to convert the response into the frequency domain to allow the amplitude of…
Annotation ability available
   This content is not included in your SAE MOBILUS subscription, or you are not logged in.

Fatigue Life Calculation under Thermal Multiaxial Stresses in EGR Coolers

SAE International Journal of Materials and Manufacturing

BorgWarner Emissions Systems-Julio Carrera, Alvaro Sanchez
University of Seville-Alfredo Navarro
  • Journal Article
  • 2015-01-0440
Published 2015-04-14 by SAE International in United States
Recent emissions standards have become more restrictive in terms of CO2 and NOx reduction. This has been translated into higher EGR rates at higher exhaust gas temperatures with lower coolant flow rates for much longer lifetimes. In consequence, thermal load for EGR components, specially EGR coolers, has been increased and thermal fatigue durability is now a critical issue during the development.Consequently a new Thermo-Mechanical Analysis (TMA) procedure has been developed in order to calculate durability. The TMA calculation is based on a Computational Fluid Dynamics simulation (CFD) in which a boiling model is implemented for obtaining realistic temperature predictions of the metal parts exposed to possible local boiling. The FEM model has also been adjusted to capture the correct stress values by submodeling the critical areas.Life calculation is based on a Multiaxial Fatigue Model that has also been implemented in FEM software for node by node life calculation. This model takes into account the effect of temperature using the stresses obtained in linear elastic FEM analyses and the temperature dependent properties of the metal. Material…
Annotation ability available