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Standard for Safety Glazing Materials for Glazing Motor Vehicles and Motor Vehicle Equipment Operating on Land Highways - Safety Standard

Glazing Materials Standards Committee
  • Ground Vehicle Standard
  • J3097Z26_201905
  • Current
Published 2019-05-28 by SAE International in United States
Specifications, test methods, and usage provisions for safety glazing materials used for glazing of motor vehicles and motor vehicle equipment operating on land highways.
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Certified Containers for Lower Deck Compartments

AGE-2 Air Cargo
  • Aerospace Standard
  • AS5896
  • Current
Published 2018-10-18 by SAE International in United States
This SAE Aerospace Standard (AS) covers the design, fabrication, performance, and testing requirements for general-purpose, base-restrained, containers requiring airworthiness approval for installation/use in aircraft lower deck compartments. See 10.1 and 10.2.
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Dynamic Stiffness Investigation of an Automotive Body-in-White by Utilizing Response Surface Methodology

Iran University of Science & Technology-Milad Abbasi, Abolfazl Khalkhali
RMIT University-Mohammad Fard
Published 2018-06-13 by SAE International in United States
Noise, vibration, and harshness (NVH) attribute is needed to be included in the vehicle structure design since improving the NVH characteristics enhances the ride quality experienced by the occupants. In this regard, an efficient method was proposed to investigate the structural dynamic response of an automotive body considering low-frequency NVH performances. Moreover, the improvement of an automotive structure under the constraint of NVH behavior was investigated by using the design of experiments (DOEs) method. The DOEs methodology was for screening of the design space and generating approximation models. Here, the thicknesses of panels consisting of a body-in-white (BIW) of an automotive were employed as design variables for optimization, whose objective was to increase the first torsional and bending natural frequencies. Central composite design (CCD) for DOEs sampling and response surface methodology (RSM) were employed to optimize the dynamic stiffness. Moreover, the effects of the selected variables as well as their binary interactions were modeled and the optimum conditions for rigidity improvement were obtained via the RSM. Furthermore, the validity of the proposed optimization scheme was…
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An Application of Acoustic Metamaterial for Reducing Noise Transfer through Car Body Panels

Gwangju Inst. of Science and Technology-Jaesoon Jung, Hyun-Guk Kim, Dong Rak Choi, Semyung Wang
Hyundai Motor Co.-Kyoung-Jin Chang
Published 2018-06-13 by SAE International in United States
This paper presents the design of an additional structure based on acoustic metamaterial (AMM) for the reduction of vibro-acoustic transfer function of a car body panel. As vehicles are lighter and those engine forces are bigger recently, it has become more difficult to reduce the vibration and noise transfer through body panels by using just conventional NVH countermeasures. In this research, a new approach based on AMM is tried to reduce the vibration and noise transfer of a firewall panel. First, a unit cell structure based on the locally resonant metamaterial is devised and the unit cell’s design variables are studied to increase the wave attenuation in the stop band of a dispersion curve, where the Floquet-Bloch theorem is used to estimate the dispersion curve of a two-dimensional periodic structure. Also, the vibration transfer and the vibro-acoustic transfer are predicted in a FE model of meta-plate which is composed of a periodic system of the devised unit cell. Next, the driving point mobility of a meta-plate is tested and its design is updated for the…
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Guiding the Way in Automotive Plants

  • Magazine Article
  • TBMG-29001
Published 2018-06-01 by Tech Briefs Media Group in United States

Vision-guided robotics commonly used in today's automotive plants enables robots to “see” the object they are working on so they can perform the required activity accurately on/to an object that is not in a repeatable location.

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CAE Simulation of Automotive Door Upper Frame Deflection Using Aerodynamic Loads

FCA US LLC-Sudhakar Doppalapudi, Khaled Sbeih, Kumar Srinivasan, Ramchandra Bhandarkar
Published 2018-04-03 by SAE International in United States
Upper frame deflection of automobile doors is a key design attribute that influences structural integrity and door seal performance as related to NVH. This is a critical customer quality perception attribute and is a key enabler to ensure wind noise performance is acceptable. This paper provides an overview of two simulation methodologies to predict door upper frame deflection. A simplified simulation approach using point loads is presented along with its limitations and is compared to a new method that uses CFD tools to estimate aerodynamic loads on body panels at various vehicle speeds and wind directions. The approach consisted of performing external aerodynamic CFD simulation and using the aerodynamic loads as inputs to a CAE simulation. The details of the methodology are presented along with results and correlation to experimental data from the wind tunnel.
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Full-Scale Burn Tests of Side-by-Side All-Terrain Vehicles

Colwell Consulting LLC-Jeff Colwell, Benjamin Knox
Published 2018-04-03 by SAE International in United States
Two full-scale burn tests involving identical side-by-side all-terrain vehicles were conducted to evaluate fire spread, changes in temperature distributions over time, and how burn patterns correlated to the known point of origin of the fires. The fires were initiated by igniting body panels at opposite corners of the vehicles such that in one test the fire propagated downwind and, in the other, it propagated upwind. In both tests, drop-down from the body panels onto the tires resulted in ignition of the tires. This was an important feature of the mechanism of fire spread. Once the tires began to burn, a transition occurred and the rate of fire spread to the remaining portion of the vehicle increased. Although the time between fire initiation and this transition was significantly different in the two tests, the time to spread and to consume the remaining combustibles within each vehicle was relatively consistent, independent of wind direction. The variation of damage to painted surfaces, oxidation patterns on steel surfaces, and melt damage to aluminum components after the fire were similar…
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A Non-contact and Non-destructive Method to Determine Process Induced Fiber Orientation of Compression Molded SMC

General Motors LLC-Bradley A. Newcomb, Hamid G. Kia
Published 2018-04-03 by SAE International in United States
Understanding process induced fiber orientation distribution of composite body panels using nondestructive techniques is of prime interest. A compression molded sheet molding compound (SMC) panel is a good example of composite panels which are heavily affected by the molding process. Determination of the directionally dependent local coefficient of linear thermal expansion by digital image correlation yields information that is utilized to determine the local fiber misorientation and calculate the local SMC tensile modulus. In our current study, this methodology is utilized to determine the directional CLTE, permitting evaluation of the SMC properties in a multitude of directions not possible in destructive testing techniques. After obtaining the directionally dependent CLTE, a micromechanical approach is utilized to calculate the local SMC tensile modulus and glass fiber misorientation angle.
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SIMULATION FOR TRACTOR CABIN VIBROACOUSTIC OPTIMIZATION

MOBILITY ENGINEERING: March 2018

  • Magazine Article
  • 18MEIP03_03
Published 2018-03-01 by SAE International in United States

In recent years, tractor operators have indicated a preference to drive more comfortable tractors. The high noise and vibration levels to which drivers of agricultural tractors often are exposed for long periods have a significant role in driver fatigue and also may lead to substantial hearing impairment and other health problems.

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Chevy unveils larger, lighter 2019 Silverado at Detroit auto show

Automotive Engineering: February 2018

Bill Visnic
  • Magazine Article
  • 18AUTP02_12
Published 2018-02-01 by SAE International in United States

With chief rival Ford setting sales records with its F-Series pickups and FCA's Ram brand prepared to unveil an all-new Ram light-duty pickup at the 2018 Detroit auto show, Chevrolet answered by unveiling on the eve of the Detroit show the 2019 Silverado 1500 that Mark Reuss, General Motors executive vice president of Global Product Development, confirmed is “all-new from the ground up.”

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