Mechanical Components

Natural DNA-Based Nonvolatile Resistive Switching Memory

Motivated by the demand for an even larger storage capacity in the information era, research efforts have been devoted to the development of more efficient and cost-effective memory elements.

Posted in: Briefs, Aeronautics, Aerospace, Aviation, Data Acquisition, Manufacturing & Prototyping, Composites, Materials, Mechanical Components, Data Acquisition
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Content Addressable Memory (CAM) Technologies for Big Data and Intelligent Electronics Enabled By Magneto-Electric Ternary CAM

Content addressable memory (CAM) is one of the most promising hardware solutions for high-speed data searching and has many practical applications such as anti-virus scanners, internet protocol (IP) filters, and network switches. Since CAM stores the data in its internal memory elements and compares them with the search data in parallel, it can achieve much faster speed compared to the software lookup.

Posted in: Briefs, Aerospace, Communications, Data Acquisition, Defense, Electronic Components, Electronics & Computers, Energy Efficiency, Internet of Things, Materials, Metals, Mechanical Components, MEMs, Semiconductors & ICs, Data Acquisition, Sensors
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New Products: February 2018 Aerospace & Defense Technology

Rugged Servers with Skylake Architecture

Themis Computer® (Fremont, CA) announced the launch of its next generation XR6 Rugged Enterprise Servers (RES) featuring the newest Intel® Xeon® Scalable (Skylake) Processors.

Posted in: Products, Aeronautics, Aviation, Data Acquisition, Defense, Board-Level Electronics, Computers, Electronic Components, Electronics, Electronics & Computers, Power Management, Power Supplies, Cameras, Imaging, Fastening, Joining & Assembly, Machinery, Mechanical Components
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Plain Bearings for Aerospace Applications

Plain bearings are used across a wide range of aerospace applications to help achieve better fuel efficiency, extend maintenance intervals, and lower carbon emissions. These applications include installation in aircraft wing systems (flaps, spoilers, and slats), flight controls, cockpit controls, auxiliary power units, landing gear, door systems, and aircraft interiors (seats, bins, latches, and hinge points). “Our plain bearings even have a footprint on Mars,” said Brett Ricci, GGB Aerospace Strategic Account Manager for North America. “Operating in temperatures between -200°C to +280°C, our plain bearings have served as the primary suspension components in the robotic drilling arm of NASA’s Curiosity Mars Rover since 2012.”

Posted in: Articles, Aerospace, Fastening, Joining & Assembly, Machinery, Mechanical Components, MEMs, Aircraft structures, Suppliers, Bearings, Spacecraft
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Quality Control for Additive Manufacturing Parts Using Non-Destructive Testing

Additive Manufacturing (AM) is growing in importance as a fabrication process for the space industry, enabling weight and cost savings through optimized designs for components. The use of AM gives aerospace engineers an alternative to more traditional manufacturing processes, but also retains the challenge of producing parts without defects. These problems can be approached using nondestructive methods such as X-ray Computed Tomography (CT) and Finite Element Modelling (FEM) to inspect geometries and quantify the impact of defects on the mechanical properties of a part, taking into account factors such as internal stress from metal cooling during fabrication.

Posted in: Articles, Aerospace Manufacturing and Fabrication, Aerospace, 3 D Printing & Additive Manufacturing, Manufacturing & Prototyping, Mechanical Components, Computer-Aided Design (CAD), Computer-Aided Engineering (CAE), Computer-Aided Manufacturing (CAM), Simulation Software, Software
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Measuring Propellant Stress Relaxation Modulus Using Dynamic Mechanical Analyzer

Structural analysis of solid rocket motors is challenging for several reasons, but the most important of these is the complex behavior of the propellant. The mechanical response of a solid propellant is time and temperature dependent. The complexity of the mathematical analysis of the propellant depends on the loading conditions, but for some loading situations, the linear viscoelasticity assumption is reasonable. In particular, linear viscoelasticity is perhaps the most appropriate material behavior description for use in the simulations of stresses related to storage conditions. Typically, simulations use a viscoelastic model in the form of a Prony series and a Williams–Landel–Ferry (WLF) equation. The parameters in these models are derived from stress relaxation experiments, making the stress relaxation experiment a key viscoelastic test, analogous to the tensile test for linear elastic materials.

Posted in: Briefs, Aerospace, Defense, Fluid Handling, Propulsion, Solid propellants, Spacecraft fuel, Performance tests
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The Ultimate Shaft-To-Hub Connection

Kinematically ground polygonal shapes have been used as drive connections for more than 45 years. What is now referred to as Polygon Systems was developed by Fortunawerke, Stuttgart, West Germany, who patented a grinding machine capable of producing matched polygonal shaft and bore diameters.

Posted in: White Papers, White Papers, Mechanical Components, Mechanics
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Non-Destructive Damping Measurement for MEMS Acceleration Switches

Microelectromechanical systems (MEMS) three-axis acceleration threshold sensors have been developed to measure acceleration threshold levels using voltage switching when the threshold is reached. Switches with different damping coefficients result in different mechanical impedances and response times. Analytical and numerical methods to model damping coefficient values based on empirical data are needed to characterize three-axis acceleration sensors; traditional methods use the displacement of an underdamped system to calculate the damping ratio.

Posted in: Briefs, Aerospace, Defense, Mechanical Components, Simulation and modeling, Sensors and actuators, Switches
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Damping Measurement for Wafer-Level Packaged MEMS Acceleration Sensors

Microelectromechanical system (MEMS) three-axis acceleration threshold sensors have been developed to measure acceleration threshold levels using voltage switching when the threshold is reached. Determining damping coefficients is important for categorizing how each threshold sensor or switch operates. Switches with different damping coefficients result in different mechanical impedances and response times. Analytical and numerical methods to model damping coefficient values based on empirical data are needed to characterize three-axis acceleration sensors; traditional methods use the displacement of an underdamped system to calculate the damping ratio.

Posted in: Briefs, Defense, MEMs, Sensors, Measuring Instruments, Sensors and actuators, Switches
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Flange Couplings

RINGFEDER POWER TRANSMISSION (Westwood, NJ) has announced the launch of its new RfN 5571 series flange coupling for heavy industry. RINGFEDER® flange couplings provide a superior solution to standard press fits. Equipped with the Ringfeder Shrink Disc this new series eliminates the needs for additional components such as keyways or shims. Eliminating the need for heating and cooling of the part reduces installation complexity. RINGFEDER® flange couplings are slip fit with frictional engagement achieved by torqueing the shrink disc screws. Available with hexagon head screws or hexagon socket head cap screws. Some of the advantages provided by this system are: a stronger connection than keyway systems, no wear parts, higher torque carrying capacity, backlash-free shaft hub connection, and a high level of true running accuracy.

For Free Info Visit http://info.hotims.com/55588-514

Posted in: Products, Defense, Consumer Product Manufacturing, Joining & Assembly
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