Browse Topic: Conductivity

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Aluminum Alloy, Castings 4.7Cu - 0.60Ag - 0.35Mn - 0.25Mg - 0.25Ti (B201.0-T7) Solution Heat Treated and Overaged AMS4242D (Current)12/9/2025
This specification covers an aluminum alloy in the form of castings.
AMS D Nonferrous Alloys Committee
Aluminum Alloy, Extruded Wide Panel Profiles (7150-T77511), 6.4Zn - 2.4Mg - 2.2Cu - 0.12Zr, Solution Heat Treated, Stress-Relieved, Straightened and OveragedAMS4325B (Current)11/21/2025
AMS4325A prohibits unauthorized exceptions (3.7), revises condition (3.2), properties (3.4.5), quality (3.5.1), reports (4.4.1), and identification (5.1.1), and results from a Five-Year Review and update of this specification.
AMS D Nonferrous Alloys Committee
Aluminum Alloy, Plate (7085-T7651) 7.5Zn - 1.6Cu - 1.5Mg - 0.12Zr Solution Heat Treated, Stress-Relieved, and OveragedAMS4329C (Current)9/30/2025
This specification covers an aluminum alloy in the form of plate 4.001 to 7.000 inch, incl. (101.62 to 177.80 mm, incl.) in thickness (see 8.4).
AMS D Nonferrous Alloys Committee
Lightning Strike Experiments and Their Direct Effects on Flax Fiber-Reinforced Polymer Panels for Rotorcraft ComponentsF-0080-2024-13075/7/2024
This paper experimentally investigates direct effects of lightning strikes on flax fiber-reinforced polymers. Highcurrent artificial lightning strikes are conducted on coupon level to evaluate thermo-mechanical damage and to quantify the sufficiency of copper wire mesh as lightning strike protection (LSP). The dataset shall also serve for verification of prospected numerical simulation. The natural fiber flax, as a sustainable source of composite reinforcement, has been demonstrated to be suitable for semi-structural parts of rotorcraft. However, its low electrical and thermal conductivity requires a functional LSP layer for aviation applications. The test panels are investigated regarding their material combination, stacking sequence and level of LSP. Results show that two as well as three layers of 72 g/m2 copper mesh are not sufficient to withstand the standardized lightning current component A waveform of 200 kA. The high induced currents and low capability of energy dissipation leads to electro-explosion of metal and transient mechanical forces from shock waves causing mechanical damage on the test panels. Back surface-velocities increase with higher peak currents and higher level of protection results in lower damage. It is shown that a stacking of copper wire mesh results in less arc root dispersion.
Gaugelhofer, Lukas, Yavrucuk, Ilkay, Hajek, Manfred, John, Jonas
Carbon Fiber Roving for Magnet Retention on BLDC MotorsF-0080-2024-12105/7/2024
This white paper discusses the application of carbon fiber roving for rotor magnet retention in high-performance Brushless DC (BLDC) motors, focusing on sectors like Advanced Air Mobility and motorsports. Highlighting the benefits of carbon fiber's tensile strength, thermal characteristics, and electrical resistivity, it compares thermoset and thermoplastic matrices, analyzing their trade-offs. It delves into manufacturing methods, particularly the advantages of in-situ winding of Hexcel® HexTow® IM7 12k carbon fiber directly onto rotors, versus pre-wound sleeves, emphasizing controlled processes for even stress distribution and preventing failure. Key design factors such as operating speed, temperature, and air gap dimensions are considered to optimize carbon fiber's application. Windings' expertise in fabricating high-tolerance carbon fiber wound rotors is showcased, highlighting its potential to enhance motor power output and offering collaboration for innovative retention solutions in BLDC motors.
Alderks, Blaine
Aluminum Alloy, Plate, 7.9Zn - 1.8Cu - 2.0Mg - 0.10Zr (7099-T7651) Solution Heat Treated, Stress Relieved, and OveragedAMS4364A (Current)9/15/2021
This specification covers an aluminum alloy in the form of plate from 1.000 to 6.000 inches (25.40 to 152.40 mm) in thickness (see 8.6).
AMS D Nonferrous Alloys Committee
CONNECTOR ACCESSORIES, ELECTRICAL BACKSHELL, 90 DEGREE, SELF-LOCKING AND NON-SELF LOCKING, PRE-ATTACHED SHIELD TERMINATION (RFI/EMI), BOOT ACCOMMODATION, CATEGORY 3B (FOR MIL-DTL-38999 SERIES I AND II CONNECTORS)AS85049/114D (Current)7/30/2021
AE-8C1 Connectors Committee
CONNECTOR ACCESSORIES, ELECTRICAL BACKSHELL, 90 DEGREE, SELF LOCKING AND NON-SELF LOCKING, PRE-ATTACHED SHIELD TERMINATION (RFI/EMI), BOOT ACCOMODATION, CATEGORY 3B FOR MIL-DTL-38999 SERIES III AND IV CONNECTORSAS85049/117D (Current)7/30/2021
AE-8C1 Connectors Committee
CONNECTOR ACCESSORIES, ELECTRICAL BACKSHELL, STRAIGHT, NON-SELF LOCKING AND SELF LOCKING, PRE-ATTACHED SHIELD TERMINATION (RFI/EMI), BOOT ACCOMMODATION, CATEGORY 3B (FOR MIL-DTL-83723 SERIES III, AS50151 CRIMP, AS95234, AS81703 SERIES III, AND MIL-DTL-26482 SERIES II CONNECTORS)AS85049/109D (Current)7/30/2021
AE-8C1 Connectors Committee
CONNECTOR ACCESSORIES, ELECTRICAL BACKSHELL, STRAIGHT, SELF LOCKING AND NON-SELF LOCKING, PRE-ATTACHED SHIELD TERMINATION (RFI/EMI), BOOT ACCOMMODATION, CATEGORY 3B (FOR MIL-DTL-38999 SERIES III AND IV CONNECTORS)AS85049/115D (Current)6/22/2021
AE-8C1 Connectors Committee
CONNECTOR ACCESSORIES, ELECTRICAL BACKSHELL, STRAIGHT, SELF LOCKING AND NON-SELF LOCKING, PRE-ATTACHED SHIELD TERMINATION (RFI/EMI), BOOT ACCOMMODATION, CATEGORY 3B (FOR MIL-DTL-38999 SERIES I AND II CONNECTORS)AS85049/112D (Current)6/22/2021
AE-8C1 Connectors Committee
CONNECTOR ACCESSORIES, ELECTRICAL BACKSHELL, 90 DEGREE, SELF LOCKING AND NON-SELF LOCKING, PRE-ATTACHED SHIELD TERMINATION (RFI/EMI), BOOT ACCOMMODATION, CATEGORY 3B (FOR MIL-DTL-83723 SERIES III, AS50151 CRIMP, AS95234, AS81703 SERIES III, AND MIL-DTL-26482 SERIES II CONNECTORS)AS85049/111D (Current)6/22/2021
AE-8C1 Connectors Committee
Hose Characteristics and Selection ChartAIR797F (Current)4/30/2021
This document lists military and industry specifications and standards which are used in aerospace systems and for ground servicing equipment. The characteristic limitations of the hose, which are of major importance to designers, and the sizes in which the hoses are standard are shown. Revisions and amendments, which are current for these specifications and standards, are not listed.
G-3, Aerospace Couplings, Fittings, Hose, Tubing Assemblies
Aluminum Alloy, Plate 6.2Zn - 2.3Cu - 2.2Mg - 0.12Zr (7050-T7451) Solution Heat Treated, Stress Relieved, and OveragedAMS4050K (Current)4/22/2021
This specification covers an aluminum alloy in the form of plate.
AMS D Nonferrous Alloys Committee
Copper-Beryllium Alloy, Bars and Rods 98Cu - 1.9Be Solution Heat Treated, Cold Worked, and Precipitation Heat Treated (TH04, formerly HT)AMS4534E (Current)4/22/2021
This specification covers a copper-beryllium alloy in the form of bars and rods up to 3.000 inches (76.20 mm), inclusive, in nominal diameter or least distance between parallel sides (see 8.7).
AMS D Nonferrous Alloys Committee
TERMINALS, LUG AND SPLICES, CONDUCTOR, CRIMP STYLE, SPLICE, ELECTRIC (PERMANENT, TYPE II, CLASS 1) FOR 105 °C TOTAL CONDUCTOR TEMPERATUREAS7928/5C (Historical)3/1/2021
AE-8C2 Terminating Devices and Tooling Committee
Eco-profiling of Bio-epoxies via Life cycle AssessmentSAE-PP-002312/3/2021
Epoxies, synthesized from bisphenol-A (BPA) and epichlorohydrin (ECH), are predominantly used as coatings, adhesives, and as matrix material in fiber-reinforced composites for body-in-white (BiW) applications in the automotive sector. However, given the production of conventional epoxies from non-renewable petroleum resource and toxicity of BPA, several initiatives have been undertaken by researchers to synthesize alternative epoxies from various bio-sources that are free of BPA and exhibit similar mechanical performance. As a result, such bio-sourced epoxies are almost immediately termed as “eco-friendly”, despite the lack of comprehensive evaluation of their ecological performance that takes into account enhanced natural resource usage and associated impacts accompanying such epoxies. Hence, this work aims at addressing this gap by evaluating the environmental impacts of such bio-sourced epoxies via cradle-to-gate life cycle assessment to determine the genuine credentials of their ecofriendliness. Epoxies synthesized from three different bio-sources – namely, bark extractives, lignin, and triglyceride – were chosen, to evaluate their ecological performance. ReCiPe midpoint and endpoint methods were used to evaluate these epoxies in accordance with ISO 14040 and 14044 standards. Among the three bio-epoxies, lignin-based epoxy exhibits poor eco-performance mainly due to the use of large amount of chemicals during extraction of lignin, involving delignification and valorization. On the contrary, bio-epoxy synthesized from triglycerides were found to be eco-friendly compared to other bio-epoxies. All bio-epoxies are observed to contribute significantly to toxicity-related categories, mainly due to higher electricity consumption during both epoxy synthesis and manufacturing processes. Overall, this work sheds light on various avenues for synthesizing truly sustainable epoxies that exhibit mechanical performance comparable to their conventional counterparts.
Anthony, Lindsay, Jackson, Alyssa
ASSEMBLED COUPLING ENVELOPE, THREADLESS - FLEXIBLE, FIXED CAVITY, CURRENT CARRYING, SELF BONDING, ENVELOPE DIMENSIONSAS7511B (Current)12/22/2020
G-3, Aerospace Couplings, Fittings, Hose, Tubing Assemblies
Aluminum Alloy, Extruded Rod, Bar, and Profiles (7055-T76511) 8.0Zn - 2.3Cu - 2.0Mg - 0.16Zr Solution Heat Treated, Stress-Relieved, and OveragedAMS4336C (Current)12/10/2020
This specification covers an aluminum alloy procured in the form of extruded bars, rods, and profiles (shapes) with nominal thickness up to 3.000 inch (76.20 mm), inclusive, and having a cross-sectional area of 26.3 square inches (170 cm2) maximum and circle size of 15.3 inches (389 mm) maximum (see 8.7).
AMS D Nonferrous Alloys Committee
Driver Drowsiness and Fatigue in the Safe Operation of Vehicles - Definition of Terms and ConceptsJ3198_202010 (Current)10/26/2020
This SAE Information Report provides definitions and discussions of key terms concerning driver drowsiness and fatigue, and basic information on measuring drowsiness and fatigue. It also includes information and concepts for driver drowsiness as they relate to the safe operation of a vehicle. The key driver drowsiness and fatigue causal factors include the following: (1) sleep quality and quantity, (2) time of day, (3) time awake, (4) time on task (modulated by characteristics of the driving task), (5) task-related fatigue (variations of arousal levels related to task underload and overload), and (6) combinations of these factors. Medical conditions, medication, alcohol, or drugs exacerbate drowsiness; however, the discussion in this report is limited to fatigue concepts. This report has two primary outputs: (1) definitions and discussions of key terms concerning driver drowsiness and fatigue, and (2) basic information on measuring drowsiness and fatigue and its effects on the safe operation of a vehicle. These include the physiological and cognitive effects of driver drowsiness and fatigue on driving safety. Examples of effect of driver drowsiness and fatigue on driving safety include those related to vehicle control, operator vigilance (sustained attention), reaction times (object and event detection and response), situational awareness, physiological indicators, subjective assessments, and combinations thereof. For definitions of driving performance measures, refer to SAE J2944. This report applies to all worldwide motor vehicle passenger cars and light trucks, as well as heavy trucks, buses, motorcycles, and mopeds. The intended users of the document are practitioners and researchers in the automotive industry, academia, and other organizations with interest in driver drowsiness and fatigue, driving and driver performance assessment, and road safety.
Driver Metrics, Performance, Behaviors and States Committee
Aftermarket Composite Wheels Made of Matrix Material and Fiber Reinforcement Intended for Normal Highway Use - Test Procedures and Performance RequirementsJ3204_202009 (Current)9/9/2020
This SAE Recommended Practice provides minimum performance requirements and uniform procedures for fatigue and impact testing, electrical resistance, and maximum operating temperature (MOT) of wheels intended for normal highway use on passenger cars, light trucks, and multipurpose vehicles.
Wheel Standards Committee
Aluminum Alloy, Extruded Rod, Bar, and Profiles (7055-T76511) 8.0Zn - 2.3Cu - 2.0Mg - 0.16Zr Solution Heat Treated, Stress-Relieved, and OveragedAMS4336B (Historical)4/28/2020
This specification covers an aluminum alloy procured in the form of extruded bars, rods, and profiles (shapes) with nominal thickness up to 3.000 inch (76.20 mm), inclusive, and having a cross-sectional area of 12 square inches (77 square centimeters) maximum and circle size of 10 inches (254 mm) maximum (see 8.6).
AMS D Nonferrous Alloys Committee
WIRE, ELECTRICAL, POLYTETRAFLUOROETHYLENE/POLYIMIDE INSULATED, SMOOTH SURFACE, NORMAL WEIGHT, NICKEL-COATED COPPER CONDUCTOR, 260 °C, 600 VOLTS ROHSAS22759/187C (Current)4/27/2020
AE-8D Wire and Cable Committee
INSULATION SLEEVING, ELECTRICAL, HEAT SHRINKABLE POLYTETRAFLUOROETHYLENEAS23053/12A (Historical)4/21/2020
AE-8D Wire and Cable Committee
Evaluation of High Resistance Connection in Automotive Application2020-01-09264/14/2020
Electrical connections have a normal operational temperature range. A high resistance, such as a poor connection, in an electrical circuit has been reported to cause a temperature increase exceeding normal operational range at the connection. This study measures the temperature increase in a typical automotive bolted battery cable connection with low to zero torque values and simulated high resistance under different load conditions. The torque is changed from maximum design value to 0 Nm and the temperature increase at the connection is measured. The high resistance connections, manually created by adjusting the contacts, are tested for several power loss values at the connection. The temperature rise under these conditions at the connection is measured and subsequently recorded. The maximum temperature increase at the bolted cable connection recorded at low torque values including 0 Nm torque compared to the maximum typical design value of 17 Nm is 10.5 °C. The maximum temperature increase for the high resistance bolted connection is a function of the power loss and the voltage drop at the connection.
Modi, Manoj, Galgoci, Brad
Aluminum Alloy, Extrusion 2.7Cu - 1.8Li - 0.7Zn - 0.3Mn - 0.3Mg - 0.08Zr (2099-T83) Solution Heat Treated, Stress Relieved by Stretching 1 to 4% and AgedAMS4287B (Current)4/10/2020
This specification covers an aluminum alloy in the form of extruded bars, rods, and profiles (shapes) produced with nominal thickness up to 3.000 inch (76.20 mm), inclusive, and having a cross sectional area of 42 square inches (271 square centimeters) maximum and a circumscribing circle diameter (circle size) of 15 inches (38 cm) maximum (see 8.9). See 8.3 for definition of circumscribing circle size.
AMS D Nonferrous Alloys Committee
Thin Films of Barium Zirconium Sulfide Offer Exceptional Electronic PropertiesTBMG-361803/1/2020
Scientists have created thin films made from barium zirconium sulfide (BaZrS3) that combine exceptionally strong light absorption with good charge transport — two qualities that make them ideal for applications such as photovoltaics and light-emitting diodes (LEDs).
Conductive Polymer/Carbon Nanotube Structural MaterialsTBMG-361723/1/2020
Carbon nanotubes (CNTs) show promise for multifunctional materials for a range of applications due to their outstanding combination of mechanical, electrical, and thermal properties. These promising mechanical properties, however, have not translated well to CNT nanocomposites fabricated by conventional methods due to the weak load transfer between tubes or tube bundles.
Improved Model Predicts Heat Loss in Gallium Nitride SemiconductorsTBMG-361893/1/2020
Engineers have found that the model currently used to predict heat loss in a common semiconductor material does not apply in all situations. By testing the thermal properties of gallium nitride semiconductors fabricated using four popular methods, they discovered that some techniques produce materials that perform better than others.
Electrically Non-Conductive Ladder Fall ProtectionTBMG-361943/1/2020
NASA’s Kennedy Space Center developed an electrically non-conductive ladder fall protection system for the Launch Complex (LC) 39B lightning towers. The towers include a 100-foot fiberglass mast at the top of the tower structure. The fiberglass masts insulate the metallic tower structure from the lightning strike protection system that is housed at the top of the fiberglass masts.
Hybrid Technique Aims to Produce Stronger, Corrosion-Resistant NickelTBMG-362773/1/2020
Nickel is a widely used metal in the manufacturing industry for both industrial and advanced material processes. Now, Purdue University innovators have created a hybrid technique to fabricate a new form of nickel that may help the future production of life-saving medical devices, as well as hightech devices and vehicles with strong corrosion-resistant protection.
Wearable Health Tech Gets Efficiency UpgradeTBMG-362543/1/2020
North Carolina State University engineers have demonstrated a flexible device that harvests the heat energy from the human body to monitor health. The device surpasses all other flexible harvesters that use body heat as the sole energy source.
Wearable Gas Sensor Enhances SensitivityTBMG-362443/1/2020
A highly sensitive wearable gas sensor for environmental and human health monitoring may soon become commercially available, according to researchers at Penn State and Northeastern University.
CONNECTORS, RECEPTACLE, ELECTRICAL, BOX MOUNTING, SOLDER CONTACT, HERMETIC, AN TYPEAS31421A (Current)2/14/2020
AE-8C1 Connectors Committee
Aluminum Alloy, Extruded Rod, Bar and Profiles (7055-T74511) 8.0Zn - 2.3Cu - 2.0Mg - 0.16Zr Solution Heat Treated, Stress-Relieved, and OveragedAMS4324B (Current)2/10/2020
This specification covers an aluminum alloy in the form of extruded bars, rods, and profiles (shapes) produced with a cross sectional area of 24 square inches (155 square centimeters) maximum and a circumscribing circle (see 8.3) diameter (circle size) of 10.5 inches (267 mm) maximum, with a nominal thickness up to 3.000 inch (76.20 mm), inclusive (see 8.6).
AMS D Nonferrous Alloys Committee
Weyl Semimetals (WSM) for Electronics Applications20AERP02_112/1/2020
New synthesized materials open the way to govern the density of helicity, axial charge, and its flow, axial current. Air Force Research Laboratory, Arlington, Virginia The major factor determining transport properties of solids is the number of electron states in a vicinity of Fermi level. In equilibrium, no macroscopic flow of electrons exists and, therefore, in order to create such flow, electrons must be excited over their equilibrium distribution. However, electrons with energies well below the Fermi level (compared to the characteristic energy scale kBT, where kB is the Boltzmann constant and T is the temperature), cannot acquire small excitation energy. Indeed, in this case, they would have energy corresponding to already occupied states, which is prohibited by the Pauli principle. In turn, well above the Fermi level, where excitation of electrons is not constrained by the Pauli principle, the electron states are not populated, thus making their contribution to the response negligible. An elementary classification of materials as conductors and insulators is, therefore, based on the relation between the Fermi level and the energy bands characterizing electron states in the solid. In metals, such as copper or silver, the Fermi level is inside the band and, therefore, metals have high electric and thermal conductivities. In insulators, for instance, silicon dioxide (SiO2) or crystal sodium chloride (NaCl), the Fermi level is inside the wide, conventionally more than 4 eV, bandgap separating valence and conduction (below and above the Fermi level, respectively) bands, for example, Δ ≈ 8.9 eV in SiO2 and Δ ≈ 8.5 eV in NaCl.
Energy Harvesting for Soft-Matter Machines and Electronics20AERP02_122/1/2020
A new class of soft multifunctional materials could be used to convert mechanical deformation from vibrations and stretching into electrical energy. Air Force Research Laboratory, Arlington, Virginia Air Force (AF) materials capable of dramatic changes in shape and rigidity require soft-matter electronics that support functionality without interfering with the mechanics of the host structure. This program introduced a new class of soft, multifunctional materials that can be used to power these systems by converting elastic strain energy from large deformations into electricity. These materials are composed of soft elastomers embedded with a suspension of liquid metal (LM) droplets that control the electrical properties of the composite. Depending on their composition and microstructure, these LM-embedded elastomers (LMEEs) can be tailored to exhibit exceptionally high electric conductivity, electric permittivity, and/or thermal conductivity. LMEEs with high permittivity can function as high-k dielectrics for storing and harvesting electrostatic energy. When integrated with an elastically deformable AF structure, they have the potential to generate electricity as the host structure stretches, twists, or bends under external loading. This external loading may arise from air drag, wind, ambient vibrations, collisions, etc. and represents mechanical work that would be otherwise dissipated through damping.
Q&A: Electrically Conductive Coated Yarn for Wearable, Washable FabricsTBMG-359822/1/2020
Professor Genevieve Dion, Director of Drexel University's (Philadelphia, PA) Center for Functional Fabrics, is collaborating with other experts to coat yarn with the highly conductive, two-dimensional material MXene. They demonstrated that the yarn could be used with standard textile manufacturing techniques to create wearable conductive fabric.
Thermally Conductive Polymer FilmsTBMG-359772/1/2020
Polymers are commonly used for thermal insulation as they are excellent at trapping heat. Thin polymer films were developed that conduct heat — an ability normally associated with metals. The films, which are thinner than plastic wrap, conduct heat better than many metals including steel and ceramic.
Energy Harvesting for Soft-Matter Machines and ElectronicsTBMG-360592/1/2020
Air Force (AF) materials capable of dramatic changes in shape and rigidity require soft-matter electronics that support functionality without interfering with the mechanics of the host structure. This program introduced a new class of soft, multifunctional materials that can be used to power these systems by converting elastic strain energy from large deformations into electricity. These materials are composed of soft elastomers embedded with a suspension of liquid metal (LM) droplets that control the electrical properties of the composite.
Aluminum Alloy, Plate (7065-T7651) 7.7Zn - 2.1Cu - 1.65Mg - 0.10Zr Solution Heat Treated, Stress-Relieved, and OveragedAMS4351A (Current)1/30/2020
This specification covers an aluminum alloy in the form of plate.
AMS D Nonferrous Alloys Committee
Aluminum Alloy, Plate (7065-T7451) 7.7Zn - 2.1Cu - 1.65Mg - 0.10Zr Solution Heat Treated, Stress-Relieved, and OveragedAMS4361A (Current)1/30/2020
This specification covers an aluminum alloy in the form of plate.
AMS D Nonferrous Alloys Committee
Mathematical Model of Heat-Controlled Accumulator (HCA) for Microgravity Conditions01-13-01-00011/20/2020
It is reasonable to use a two-phase heat transfer loop (TPL) in a thermal control system (TCS) of spacecraft with large heat dissipation. One of the key elements of TPL is a heat-controlled accumulator (HCA). The HCA represents a volume which is filled with vapor and liquid of a single working fluid without bellows. The pressure in a HCA is controlled by the heater. The heat and mass transfer processes in the HCA can proceed with a significant nonequilibrium. This has implications on the regulation of TPL. This article presents a mathematical model of nonequilibrium heat and mass transfer processes in an HCA for microgravity conditions. The model uses the equations of mass and energy conservation separately for the vapor and liquid phases. Interfacial heat and mass transfer is also taken into account. It proposes to use the convective component k for the level of nonequilibrium evaluation. The experiments were carried out in microgravity conditions for the estimation of the k value. The heating of the HCA was investigated in the flight experiments. The working fluid was ammonia. It was determined that in the mathematical model, the k low margin is k = 15…30 for the microgravity conditions. An analysis of the HCA regulation was performed for two values of the k coefficient. It defined that nonequilibrium has a significant impact on the regulation process. It is shown that to ensure a given mode of TPL operation with the HCA equilibrium process (k > 100), a greater HCA heater power is required than in a nonequilibrium process (k = 30).
Gennadiy Olexandrovich, Gorbenko, Polina Sergeevna, Koval, Konstantin Sergeevich, Yepifanov, Pavlo Grigorovich, Gakal, Rustem Yusufovich, Turna
Q&A: A Shape-Morphing, Self-Healing Soft CompositeTBMG-357881/1/2020
Carmel Majidi, Professor of Mechanical Engineering at Carnegie Mellon University, and his team has developed a material with a unique combination of high electrical and thermal conductivity, with actuation and self-repair capabilities that are unlike any other soft composite.
Hardening Lightweight Metal Foams with NanocoatingTBMG-358181/1/2020
Bones are strong and stable and can cope with loads almost as well as steel. But despite their strength, they are light enough to be easily moved by humans and animals. The secret lies in the combination of a hard, exterior shell that encases a porous lattice-like network of bone tissue in the interior of the bone. This structure saves on material and reduces weight.
Microrobot Powered by Soft MusclesTBMG-358281/1/2020
Researchers have developed a microrobot called RoboBee powered by soft artificial muscles that can crash into walls, fall onto the floor, and collide with other RoboBees without being damaged. It is the first microrobot powered by soft actuators to achieve controlled flight.
Understanding Base Oils and Lubricants for Electric Drivetrain Applications2019-01-233712/19/2019
ABSTRACT The penetration of hybridization and electrification (HEV and EV) technology into automotive powertrain designs is an evolving trend resulting from global regulations intended to reduce transportation-related emissions of greenhouse gases and other pollutants and to improve vehicle fuel efficiency. In many HEV and EV hardware designs, drivetrain fluids have contact with the integrated electric motor (e-motor), which requires electrical and thermal properties to be considered in addition to traditional fluid properties. This paper discusses new insights gained around electrical and thermal properties of drivetrain fluids, with a specific emphasis on understanding the critical impacts of base oils (BOs). Electrical and thermal properties data as a function of temperature for a range of BOs as well as automatic transmission fluids are shared. We found that BOs and their viscosities play a critical role in cooling performance, while additives play a critical role in electrical conductivity (EC). That being said, we also have observed that additives in BOs can modify cooling performance. We will demonstrate how each component in the additive package affects EC and in some cases cooling performance. The successful utilization of this knowledge is demonstrated on a proof-of-principle basis to show that fluids with appropriate electrical and thermal properties can be designed to meet critical factors for electrification such as cooling capacity and EC, while still maintaining essential performance features for conventional driveline fluids.
Kwak, Yungwan, Cleveland, Christopher, Adhvaryu, Atanu, Fang, Xinggao, Hurley, Susie, Adachi, Tsuneo
INSULATION SLEEVING, ELECTRICAL, HEAT SHRINKABLE, POLYVINYL CHLORIDE, SEMI RIGID, CROSSLINKED AND NON-CROSSLINKEDAS23053/2A (Current)12/10/2019
AE-8D Wire and Cable Committee
Engineered Solutions for Enclosure Sealing and InsulationTBMG-3566812/1/2019
In the aerospace and defense industries, enclosure sealing and insulation needs to meet challenging and complex requirements. For example, the EMI gaskets that are used in military touchscreens must shield sensitive electronics from electromagnetic interference (EMI) while providing electrical conductivity and ensuring environmental sealing. These enclosure gaskets must also cushion the unit from mechanical shock and avoid interfering with the display's touch function.
Metal-Plated, High-Temperature PlasticsTBMG-3567312/1/2019
Semplastics Orlando, FL (407) 339-0879
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