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Fluid-Structure Interaction-Based Simulation Methods for Fluid Sloshing in Tanks

John Deere Technology Center India Pvt Ltd-Nitin Shelke, Amol Bade, Sourabh Mukhopadhyay
  • Technical Paper
  • 2019-01-5091
Published 2019-12-06 by SAE International in United States
One of the conventional approaches of structural analysis of containers or tanks accounting for fluid sloshing is based on the dynamic equilibrium of fluid in constant acceleration. This method does not account for the effect of structural deformation on fluid, which may affect the solution accuracy. During sloshing, the liquid exerts a dynamic force on the surrounding walls, which results in high strains at the welded joints of the tank and its mounting structure. This paper compares simulation techniques, which can handle highly nonlinear, dynamic, and random processes of sloshing motion, as well as tackle the variability due to other parameters such as tank motion and liquid depth. This paper discusses Coupled Eulerian-Lagrangian (CEL), smoothed-particle hydrodynamics (SPH), and fluid (computational fluid dynamics, CFD)-structural (finite element analysis, FEA) one-way coupled techniques through the simulation of the sloshing phenomenon in a tank using “Abaqus” software tools. The CEL and SPH capabilities allow for the interaction between the Lagrangian and Eulerian domain. Representing fluids by using Eulerian elements eliminates the problem of extreme element deformation associated with Lagrangian…
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Unsettled Issues in Determining Appropriate Modeling Fidelity for Automated Driving Systems Simulation

Silicon Valley Mobility-Sven Beiker
  • Research Report
  • EPR2019007
Published 2019-12-06 by SAE International in United States
This SAE EDGE™ Research Report identifies key unsettled issues of interest to the automotive industry regarding the challenges of achieving optimal model fidelity for developing, validating, and verifying vehicles capable of automated driving. Three main issues are outlined that merit immediate interest:First, assuring that simulation models represent their real-world counterparts, how to quantify simulation model fidelity, and how to assess system risk.Second, developing a universal simulation model interface and language for verifying, simulating, and calibrating automated driving sensors.Third, characterizing and determining the different requirements for sensor, vehicle, environment, and human driver models.SAE EDGE™ Research Reports are preliminary investigations of new technologies. The three technical issues identified in this report need to be discussed in greater depth with the aims of, first, clarifying the scope of the industry-wide alignment needed; second, prioritizing the issues requiring resolution; and, third, creating a plan to generate the necessary frameworks, practices, and protocols.NOTE: SAE EDGE™ Research Reports are intended to identify and illuminate key issues in emerging, but still unsettled, technologies of interest to the mobility industry. The goal of…
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Aircraft Fuel System Design Guidelines

AE-5A Aerospace Fuel, Inerting and Lubrication Sys Committee
  • Aerospace Standard
  • AIR7975
  • Current
Published 2019-12-05 by SAE International in United States
This document describes the major design drivers and considerations when designing a fuel system for a large commercial aircraft. It discusses the design at a system/aircraft level, and is not intended as a design manual for individual system components, though it does refer out to other SAE specifications where more detail on specific components and sub-systems is given. It does include examples of a number of calculations associated with sizing of fuel systems, based on those given in NAV-AIR-06-5-504, as well as an appendix summarizing basic fluid mechanical equations which are key for fuel system design. It is acknowledged that most of these calculations would today be performed by modelling tools, rather than by hand, but it is considered important for the designer to understand the principles. It is intended that later issues of this document will include appendices which give specific considerations for military aircraft, smaller commercial aircraft, and rotorcraft.
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CRIMPING TOOL, TYPE 2, TERMINAL, HAND, WIRE TERMINATION FOR SIZE 12 SHIELDED CONTACTS (SHIELD CRIMP SLEEVE)

AE-8C2 Terminating Devices and Tooling Committee
  • Aerospace Standard
  • AS22520/22A
  • Current
Published 2019-12-05 by SAE International in United States
No Abstract Available.
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SAE Truck & Off-Highway Engineering: December 2019

  • Magazine Issue
  • 19TOFHP12
Published 2019-12-05 by SAE International in United States
Heavy-duty engine design What are the most significant factors influencing the way engine developers approach near-term design and development cycles? Two experts provide their insights from recent programs.Reducing winter range loss for electric trucks Researchers at the Austrian Institute of Technology have developed an air exchange system that's capable of reducing heat load by 37% in real-world tests.Narrower focus, bigger payoff Design teams are targeting focused markets for their commercial electric-vehicle programs to combat challenges like range and infrastructure.Removing complexity for autonomous trucks Narrowing the operating domains for driverless commercial vehicles reduces the requirements of autonomous technology and speeds time to market.Plastics innovations 2019 The 49th annual SPE Automotive Awards highlight the ongoing benefits of lightweight polymers and composites.Editorial Hop on the hydrogen highwayLeak testing of commercial-vehicle AC systems critical as move to HFO refrigerants loomsAkasol packs industry-leading energy density into new battery designMahle and partners develop super-efficient natural-gas engine for stationary powerHow battery technology will drive truck electrificationPlatinum nanoparticles for fuel-cell catalysts may cut costCaterpillar launches next-gen mini hydraulic excavator, skid steer and compact…
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WIRE, ELECTRICAL, POLYVINYL CHLORIDE INSULATED, POLYAMIDE JACKET, TIN-COATED COPPER CONDUCTOR, MEDIUM WEIGHT, 600-VOLT, 105 °C

AE-8D Wire and Cable Committee
  • Aerospace Standard
  • AS50861/7A
  • Current
Published 2019-12-05 by SAE International in United States
No Abstract Available.
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Oxidation of Soybean Biodiesel Fuel in Diesel Engine Oils

SAE International Journal of Fuels and Lubricants

Ford Motor Company, USA-James C. Ball, James E. Anderson, Dairene Uy, Timothy J. Wallington
Michigan State University, USA-Jacob A. Duckworth
  • Journal Article
  • 04-12-03-0015
Published 2019-12-05 by SAE International in United States
During diesel engine operation, some fuel is entrained in engine oil, particularly as a consequence of strategies to regenerate NOx traps or particle filters. This “fuel dilution” of oil can adversely affect engine oil properties and performance. Compared to diesel fuel, biodiesel is more prone to fuel dilution and more susceptible to oxidation. Oxidation stability experiments were conducted at 160°C using a modified Rapid Small-Scale Oxidation Test (RSSOT) and a Rancimat instrument with 0, 5, 10, and 20 wt% biodiesel in four fully formulated engine oils, two partially formulated engine oils, and two base oils. These experiments showed decreasing oxidation stability with increasing biodiesel content. An exception was noted with the least stable oils (two base oils and one engine oil) in which 5 wt% biodiesel improved the oxidation stability relative to oil without biodiesel. Experiments with biodiesel distillation fractions identified this stability enhancement within the least volatile biodiesel fraction, consistent with natural antioxidants in the biodiesel. Omission of two engine oil additives, antioxidants and zinc dialkyldithiophosphates (ZDDP), led to an unexpected increase in oxidation…
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WIRE, ELECTRICAL, POLYVINYL CHLORIDE INSULATED, POLYAMIDE JACKET, TIN-COATED COPPER CONDUCTOR, 600-VOLT, 105 °C

AE-8D Wire and Cable Committee
  • Aerospace Standard
  • AS50861/1A
  • Current
Published 2019-12-05 by SAE International in United States
No Abstract Available.
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CONTACTS, ELECTRICAL CONNECTOR, SOCKET, CRIMP REMOVABLE (FOR MIL-DTL-12883/44, MIL-DTL-12883/45, MIL-DTL-12883/46, AND MIL-DTL-12883/52 RELAY)

AE-8C1 Connectors Committee
  • Aerospace Standard
  • AS39029/101B
  • Current
Published 2019-12-05 by SAE International in United States
No Abstract Available.
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BOLT, MACHINE - DOUBLE HEXAGON EXTENDED WASHER HEAD, CLOSE TOLERANCE SHANK, AMS4967 (UNS R56400), 160 KSI, .5625-18, UNJF-3A

E-25 General Standards for Aerospace and Propulsion Systems
  • Aerospace Standard
  • AS3153B
  • Current
Published 2019-12-05 by SAE International in United States
No Abstract Available.
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