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Vehicle Sound Package Materials Web Seminar RePlay

  • Webinar Recordings
  • PD331204ON
Published 2019-11-01
This four-session course provides a detailed understanding of the source – path-receiver relationship for developing appropriate sound package treatments in vehicles, including automobiles, commercial vehicles, and other transportation devices. The web seminar provides a detailed overview of absorption, attenuation (barrier), and damping materials and how to evaluate their performances on material, component, and vehicle level applications. A significant part of this course is the case studies that demonstrate how properly designed sound package materials successfully address vehicle noise issues.By participating in this course, you will be able to: Identify various descriptors that are used in acoustics while working with sound package materialsIdentify three fundamentally different sound package materials that are used in the industryExplain how these materials work and how to improve their performanceDescribe how various measurements are made and why they are necessary on a material level, component level, and vehicle levelPrescribe appropriate sound package materials for specific NVH issuesConstruct proper protocols for combining different sound package materials for different components so that the final vehicle meets the required acoustic target
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Analyses on Mechanical Properties of the Cylindrical Double-V Micro-Structure

Nanjing University of Aeronautics and Astronautics-Yuanlong wang, Hong Zhong
University of Michigan - Ann Arbor-Qiang Gao, Zheng-Dong Ma
Published 2018-04-03 by SAE International in United States
The double-V micro-structures (DVMS) are a type of auxetic materials showing the negative Poisson’s ratio which can contract under compression different from the conventional materials. Due to the unique properties, it can have higher stiffness and better impact resistance with lightweight. In this paper, a cylindrical honeycomb tube based on the double-V unit cell is proposed. Firstly, the nominal Poisson’s ration and Young’s modulus in the longitudinal and circumferential directions are derived analytically. The effect of the geometry parameters of the DVMS tube on the mechanical properties is studied thoroughly. Also, the effect of the width in the radial direction on these mechanical properties is analyzed. Secondly, the finite element (FE) method is utilized to obtain the numerical solutions and verify the accuracy of the analytical solutions. The results show that there is a good agreement between the results obtained by the two methods when the width is smaller enough. With the width in a radial direction increasing, the difference between two solutions begins to appear and grow. Therefore, an adjust function related to the…
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AE-8C2 Terminating Devices and Tooling Committee
  • Aerospace Standard
  • AS81824/11
  • Current
Published 2016-11-14 by SAE International in United States
No Abstract Available.
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Carbon Silicon Carbide Brakes for a Premium Saloon - an NVH Perspective

Bentley Motors Ltd.-Deaglan O'Meachair, Stamatis Angelinas, Matthew Crumpton
IDIADA Automotive Technology-Antonio Rubio Flores, Juan Garcia, Pablo Barles
Published 2016-09-18 by SAE International in United States
Bentley Motors Ltd. has developed a Carbon Silicon Carbide (CSiC) brake system for its Mulsanne product, introduced at 17MY. The CSiC brake system is conceived as a performance brake system, and as such offers notable improvements in brake performance. In developing the brake system, particular focus was placed on meeting the refinement levels required for a premium product, and indeed as the flagship model for Bentley Motors, NVH refinement of the brake system was of particular concern.This paper intends to discuss the technical performance of the brake system and review the NVH performance of the brakes. Particular attention is given to the methodology employed by Bentley Motors Ltd. and IDIADA Automotive Technology S.A. in identifying NVH concerns, and proposing and validating solutions in the field, through extensive NVH endurance runs. The performance of the system is benchmarked against similar systems offered by Bentley Motors.
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Correlation Analysis between Friction Material Parameters and the NVH Behavior

TMD Friction GmbH-Enrique Wegmann, Achim Dohle
Published 2015-09-27 by SAE International in United States
The NVH behavior of brake systems remains a core problem for the brake industry. Many efforts have been made to achieve a better system understanding, but the prediction of noise occurrence based on measurable parameters remains unsatisfactory.By considering the brake pad as one key component within the brake system, until today different measurement methods describing its material properties have been developed. This work analyses the correlation of all important “state of the art” friction material/pad parameter measurement methods to the NVH behavior of a specific brake system on a statistical basis. The answer to the question “does the NVH parameter for friction materials exist” ? will be derived from these correlation results.
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Material Safety Data Sheets

AMS B Finishes Processes and Fluids Committee
  • Aerospace Material Specification
  • AMS2825B
  • Current
Published 2010-01-05 by SAE International in United States

This specification has been declared "CANCELLED" by the Aerospace Materials Division, SAE, as of xxxx and has been superseded by ANSI Z400.1, Material Safety Data Sheets -Preparation. The requirements of the latest issue of ANSI Z400.1 shall be fulfilled whenever reference is made to the cancelled AMS2825. By this action, this document will remain listed in the Numerical Section of the Index of Aerospace Material Specifications, noting that it has been superseded by ANSI Z400.1.

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Materials and Design: The Art and Science of Material Selection in Product Design, 2nd Edition

Michael F. Ashby, Kara Johnson, Michael Ashby
  • Book
  • B-ELS-033
Published 2009-10-16 by Elsevier in United Kingdom
Materials are the stuff of design. From the very beginning of human history, materials have been taken from the natural world and shaped, modified, and adapted for everything from primitive tools to modern electronics. This renowned book by noted materials engineering author Mike Ashby and Industrial designer, Kara Johnson, explores the role of materials and materials processing in product design, with a particular emphasis on creating both desired aesthetics and functionality. The new edition will feature even more of the highly useful "materials profiles," that give critical design, processing, performance and applications criteria for each material in question. The reader will find information ranging from the generic and commercial names of each material, its physical and mechanical properties, its chemical properties, its common uses, how it is typically made and processed, and even its average price. And with improved photographs and drawings, the reader will be taken even more closely to the way real design is done by real designers, selecting the optimum materials for a successful product.
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The Effect of Environmental Humidity and Temperature on Friction Level and Squeal Noise Propensity for Disc Brake Friction Materials

FRAS-LE Friction Materials-Luciano Tedesco Matozo, Marcos R.F. Soares
Federal University of Santa Catarina-Hazim Ali Al-Qureshi
Published 2008-10-12 by SAE International in United States
This paper addresses the effect of environmental humidity and temperature on friction level and squeal noise propensity of friction materials when measured in dynamometers at laboratory controlled test conditions. The present work investigates the influence of the environment conditions on the result of noise and friction evaluation of friction material for disc brakes. The relationship among environmental conditions and squeal noise propensity has been studied before by a few authors [1] and is still an open issue when concerns to standard evaluation performed at laboratory controlled conditions. The effect of two main environmental properties for dynamometer testing, cooling air temperature (between 10 and 30°C) and humidity (between 25 to 85%), on friction level and noise were evaluated using a front disc brake. A test matrix, based on SAE J2521, was developed to adequately evaluate these two variables separately into a NVH environmental chamber equipped dynamometer. All experiments were performed with two different class friction materials, NAO and SEMI-MET. The final results show that friction level of NAO and SEMI-MET materials can be influenced by cooling…
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UNS 2008 Set

  • Handbook Supplement (HS)
  • UNS2008.SET
Published 2008-07-15 by ASTM in United States
No Abstract Available.

Castable, Relatively Stiff Acoustic-Damping Materials

  • Magazine Article
  • TBMG-4719
Published 2007-10-01 by Tech Briefs Media Group in United States

A recently invented family of acoustic-damping materials offers advantages over prior acoustic-damping materials: