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Titanium Alloy Bars, Forgings and Forging Stock, 3Al - 8V - 6Cr - 4Mo - 4Zr, Solution Heat Treated and Aged

AMS G Titanium and Refractory Metals Committee
  • Aerospace Material Specification
  • AMS6921C
  • Current
Published 2019-01-25 by SAE International in United States

This specification covers a titanium alloy in the form of bars up through 4.000 inches (101.60 mm) in nominal diameter or least distance between parallel sides, inclusive, forgings of thickness up through 4.000 inches (101.60 mm), inclusive, and stock for forging of any size (see 8.6).

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Washer - Flat Load Spreading, Metric, AMS5525

E-25 General Standards for Aerospace and Propulsion Systems
  • Aerospace Standard
  • MA3265A
  • Current
Published 2019-01-25 by SAE International in United States

Scope is unavailable.

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Electrifying Long-Haul Freight-Part II: Assessment of the Battery Capacity

University of Kansas, USA-Christopher Depcik, Anmesh Gaire, Jamee Gray, Zachary Hall, Anjana Maharjan, Darren Pinto, Arno Prinsloo
  • Journal Article
  • 02-12-02-0007
Published 2019-01-25 by SAE International in United States
Recently, electric heavy-duty tractor-trailers (EHDTTs) have assumed significance as they present an immediate solution to decarbonize the transportation sector. Hence, to illustrate the economic viability of electrifying the freight industry, a detailed numerical model to estimate the battery capacity for an EHDTT is proposed for a route between Washington, DC, to Knoxville, TN. This model incorporates the effects of the terrain, climate, vehicular forces, auxiliary loads, and payload in order to select the appropriate motor and optimize the battery capacity. Additionally, current and near-future battery chemistries are simulated in the model. Along with equations describing vehicular forces based on Newton’s second law of motion, the model utilizes the Hausmann and Depcik correlation to estimate the losses caused by the capacity offset of the batteries. Here, a Newton-Raphson iterative scheme determines the minimum battery capacity for the required state of charge. Consequently, the model demonstrates different combinations of battery capacities and payloads while checking minimum conditions of brake torque, motor torque, and current draw. Most importantly, battery life and aging effects are included to account for…
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Titanium Alloy Bars, Forgings and Forging Stock, 3Al - 8V - 6Cr - 4Mo - 4Zr, Solution Heat Treated

AMS G Titanium and Refractory Metals Committee
  • Aerospace Material Specification
  • AMS6920D
  • Current
Published 2019-01-25 by SAE International in United States

This specification covers a titanium alloy in the form of bars up through 4.000 inches (101.60 mm) in nominal diameter or least distance between parallel sides, inclusive, forgings of thickness up through 4.000 inches (101.60 mm), inclusive, and stock for forging of any size (see 8.6).

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Hewing Out Evacuation Routes for Burning Buses by Linear-Shaped Charge Jet

Nanchang University, China-Yanshu Fu, Chaoyang Zhang
  • Journal Article
  • 09-07-01-0002
Published 2019-01-25 by SAE International in United States
In recent years, several buses have ignited in some cities in China, causing numerous deaths and significant property damage. However, few research studies have been conducted to deal with such accidents. Therefore, in this work, a linear-shaped charge jet with rectangular cross sections was used to hew out evacuation routes for burning buses, and the parameter design for the shaped charge jet was improved according to asymmetry limitations and human tolerance. A numerical finite element simulation model of the behavior of a jet penetrating the jambs was established using ANSYS/LS-DYNA software. The asymmetrical characteristics of an arc segment in the structure of a rectangular-shaped charge were analyzed, in addition to the influence on the deviations of the jet penetration capacity and blast injuries to occupants caused by the side effects of detonation. Furthermore, overlooking the risks posed to bystanders by the process of hewing out evacuation routes, the calculation results revealed that the improved scheme could effectively ensure the security of the near-field occupants. Barrier-free evacuation routes could be utilized within microseconds.
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Separable and Standard Monte Carlo Simulation of Linear Dynamic Systems Using Combined Approximations

Grand Valley State University, USA-Mahdi Norouzi
University of Toledo, USA-Efstratios Nikolaidis
  • Journal Article
  • 02-12-02-0008
Published 2019-01-25 by SAE International in United States
Reliability analysis of a large-scale system under random dynamic loads can be a very time-consuming task since it requires repeated studies of the system. In many engineering problems, for example, wave loads on an offshore platform, the excitation loads are defined using a power spectral density (PSD) function. For a given PSD function, one needs to generate many time histories to make sure the excitation load is modeled accurately. Global and local approximation methods are available to predict the system response efficiently. Each way has their advantages and shortcomings. The combined approximations (CA) method is an efficient method, which combines the advantages of local and global approximations. This work demonstrates two methodologies that utilize CA to reduce the cost of crude or separable Monte Carlo simulation (MCS) of linear dynamic systems when the excitation loads are defined using PSD functions. The system response is only calculated at a few frequencies within the range of the PSD function, and CA is used to estimate the response for the other frequencies of excitation. This approach significantly reduces…
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SAE Truck & Off-Highway Engineering: February 2019

  • Magazine Issue
  • 19TOFHP02
Published 2019-01-24 by SAE International in United States
Over-the-air affair Remote updating of software and firmware on commercial trucks and off-highway machines is on the rise, not only for maintenance functions but also to add new features like operator-assist technology.Developments in engine-based gensets With demand for generator sets steady and regulatory change settling, suppliers can rationalize their offerings and push improvements in areas like noise abatement and economy.Testing, testing and even more testing The commercial-vehicle market is eager to adopt more ADAS and automated-driving innovations, but before those technologies get to the road they must first pass rigorous testing practices that prove their efficacy.Smart and connected powertrains FPT Tech Day reveals multi-power Cursor X concept, other "4.0 innovations" for hydrogen fuel cell, electric and natural gas propulsion.Editorial Medium-duty trucks make headway- and headlinesVolvo CE, Skanska demonstrate concept electric siteArgus responds over-the-air to combat new cyber threatsSAE updates J3016 automated-driving graphicTekscan goes fast-track with its high-speed tire scanningEmerson proposes electric-powered heat pumps for school busesCaterpillar Ventures invests in Fisker for electric futureDeere displays ag equipment at CES to tout software, AI techQ&A Tenneco talks…
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TS49 ELASTOMERIC TOROIDAL SEALING RINGS (O-RINGS) Manufacturing & Inspection Standards for Aerospace Application

Engine and Airframe Technical Standards Committee (TSC)
  • SAE ITC E&A Standard
  • TS49-3
  • Current
Published 2019-01-24 by SAE Industry Technologies Consortia in United States

No scope available.

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Aerospace & Defense Technology: February 2019

  • Magazine Issue
  • 19AERP02
Published 2019-01-24 by SAE International in United States
Ruggedizing Commercial-Grade Computers into MIL-Hardened SystemsAn Introduction to PCM Heat SinksEye Tracking Technology Improving the Skills Gap, Efficiency, and Quality Assurance in Aerospace ManufacturingStreamlining EMC Solutions for Avionics InterfacesHardware Design of a High Dynamic Range Radio Frequency (RF) Harmonic Measurement System.Using RISC-V to Simplify Data Logging in SpaceNovel Characterization Methods for Anisotropic and Mixed-Conduction Materials Seven new characterization methods have been developed for the specialized materials used in state-of-the-art electronic and optoelectronic devices.Circuit Models for Robust, Adaptive Neural Control Understanding a nematode's simple circuit could provide a foundation for understanding much more complex behaviors.Evaluation of Aeronautical Design Standard - 33 Using a UH-60A Black Hawk Flight tests determine whether performance standards developed for scout and attack class rotorcraft can be applied to utility helicopters.Synthetic Aperture Radar for Helicopter Landing in Degraded Visual Environments New technology could give helicopters the ability to overcome zero-visibility brownout conditions during landing.Pulsed Microwave Plasma Instrumentation for Investigation of Plasma-Tuned Multiphase Combustion Instrumentation developed to support the investigation of electromagnetic wave interaction with energetic materials and flames could help develop microwave-sensitive…
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Low Cycle Fatigue and Ratcheting Behavior of SA333 Gr-6 Steel at 300°C Temperature

National Institute of Technology Jamshedpur, India-Girendra Kumar, Ashok Kumar
National Metallurgical Laboratory, Jamshedpur, India-H.N. Bar
  • Journal Article
  • 05-12-01-0006
Published 2019-01-23 by SAE International in United States
The objective of this investigation is to study the cyclic deformation behavior of SA333 Gr-6 C-Mn steel at 300°C. Low cycle fatigue tests were carried out at total strain amplitude between ±0.35 and ±1.25% at a constant strain rate of 1 × 10−3 s−1. Ratcheting tests were conducted at a various combination of mean stress and stress amplitude at a constant stress rate of 115 MPa s−1. The material SA333 Gr-6 steel exhibits cyclic hardening throughout its fatigue life. The material shows non-Masing behavior and deviation (δσo ) from Masing behavior increase with an increase in strain amplitude. Ratcheting strain accumulation increases, whereas ratcheting life decreases with an increase in mean stress or stress amplitude. With an increase in mean stress and stress amplitude, ratcheting rate also increases. The material shows hardening characteristic due to dynamic strain aging (DSA) phenomena.
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