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Effects of Helical Carbon Nanotubes on Mechanical Performance of the Composite Bonded Joints

Wichita State University-Ramanan Sritharan, Davood Askari
  • Technical Paper
  • 2020-01-0029
To be published on 2020-03-10 by SAE International in United States
Most composite assemblies and structures generally fail due to the poor performance of their bonded joints that are assembled together with an adhesive layer. Adhesive failure and cohesive failure are among the most commonly observed failure modes in composite bonded joint assemblies. These failure modes occur due to the lack of reinforcement within the adhesive layer in transverse direction. The overall performance of any composite assembly largely depends on the performance of its bonded joints. Various techniques and processes were developed in recent years to improve mechanical performance of the composite bonded joints, one of which includes the use of nanoscale reinforcements within the adhesive layer in between the adherends. However, most prior research have been focused on use of straight carbon nanotubes (CNTs) and other nanomaterials in particle forms. The goal was to improve the properties of the adhesive film and their interfacial bonding effectiveness. Because CNTs are inert in nature, they should be covalently functionalized, before incorporating them into adhesive resins. CNTs can be functionalized using different chemicals to improve their interactions with…
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Advances in drilling Composites with PCD drills.

Facet Precision Tool GmbH-Jeremy Bunting, John Bunting
  • Technical Paper
  • 2020-01-0035
To be published on 2020-03-10 by SAE International in United States
The use of PCD drills for drilling stack ups of CFRP/Titanium is reviewed. The effect of improvements in PCD micro structure. cutting edge drill design, and coolant flow are documented with improvements in cycle time, hole quality, and and exit burrs.
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CONNECTORS, ELECTRICAL, CIRCULAR, MINIATURE, COMPOSITE, HIGH DENSITY, QUICK COUPLING, ENVIRONMENT RESISTANT, REMOVABLE CRIMP CONTACTS, PLUG (SERIES A)

AE-8C1 Connectors Committee
  • Aerospace Standard
  • AS29600/12A
  • Current
Published 2020-01-21 by SAE International in United States
No Abstract Available.
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Composite Electrical Connectors

AE-8C1 Connectors Committee
  • Aerospace Standard
  • AIR4567B
  • Current
Published 2020-01-21 by SAE International in United States
This SAE Aerospace Information Report (AIR) establishes guidelines for evaluating composite electrical connectors and accessories.
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CONNECTORS, ELECTRICAL, CIRCULAR, MINIATURE, COMPOSITE, HIGH DENSITY, QUICK COUPLING, ENVIRONMENT RESISTANT, REMOVABLE CRIMP CONTACTS, RECEPTACLE, FLANGED (SERIES A)

AE-8C1 Connectors Committee
  • Aerospace Standard
  • AS29600/10A
  • Current
Published 2020-01-21 by SAE International in United States
No Abstract Available.
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PLASTICS INNOVATIONS 2019

SAE Truck & Off-Highway Engineering: December 2019

Lindsay Brooke
  • Magazine Article
  • 19TOFHP12_05
Published 2019-12-01 by SAE International in United States

The 49th annual SPE Automotive Awards highlight the ongoing benefits of lightweight polymers and composites.

The Society of Plastics Engineers (SPE) annual Automotive Innovation Awards Competition, now in its 49th year, is considered the “Oscars” for those developing polymer and composites-intensive components, systems and vehicles. Winners of the 2019 competition topped an incredible field of entries that continue to show the benefits of lightweight, durable plastics across the spectrum of vehicle applications.

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Molecular Engineering for Mechanically Resilient and Stretchable Electronic Polymers and Composites

Aerospace & Defense Technology: December 2019

  • Magazine Article
  • 19AERP12_10
Published 2019-12-01 by SAE International in United States

Establishing the design criteria for elasticity and ductility in conjugated polymers and composites by analysis of the structural determinants of the mechanical properties.

The ability to predict the mechanical properties of organic semiconductors is of critical importance for roll-to-roll production and thermomechanical reliability of organic electronic devices. This research describes the use of coarse-grained molecular dynamics simulations to predict the density, tensile modulus, Poisson ratio, and glass transition temperature for poly(3-hexylthiophene) (P3HT) and its blend with C60. In particular, it is shown that the resolution of the coarse-grained model has a strong effect on the predicted properties.

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Sensing Applied Load and Damage Effects in Composites with Nondestructive Techniques

Aerospace & Defense Technology: December 2019

  • Magazine Article
  • 19AERP12_08
Published 2019-12-01 by SAE International in United States

Comparing and correlating piezoelectrically induced guided waves, acoustic emission, thermography, and X-ray imaging to determine the effects of applied load on a composite structure.

Composite materials are desirable for aeronautical and aerospace applications for many reasons including their high strength-to-weight ratios, fatigue and corrosion resistance, design adaptability, and performance capabilities in harsh environments. Because of these qualities, composites are useful in many applications such as in armor, helmets, and helicopters, and as structural components.

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Aerospace & Defense Technology: December 2019

  • Magazine Issue
  • 19AERP12
Published 2019-12-01 by SAE International in United States
Engineered Solutions for Enclosure Sealing and InsulationTips for Reducing Error When Using Eddy Current Measuring TechniquesReducing the High Cost of TitaniumStreamlining Post-Processing in Additive ManufacturingSoftware-Defined Analog Filters: A Paradigm Shift in Radio Filter Performance and CapabilitySDR Interface for the NeXtRAD Multistatic Radar SystemElectrodeposition of Metal Matrix Composites and Materials Characterization for Thin-Film Solar Cells Metal matrix composites, which consist of silver-multiwalled carbon nanotube-silver, layer-by-layer stacks, can electrically bridge the cracks (>40 μm) that appear in semiconductor substrates and the composite grid lines.Sensing Applied Load and Damage Effects in Composites with Nondestructive Techniques Comparing and correlating piezoelectrically induced guided waves, acoustic emission, thermography, and X-ray imaging to determine the effects of applied load on a composite structure.Technology Impact Forecasting for Multi-Functional Composites Multi-functional composites offer a possible solution to the conflicting design goals of making new aircraft lighter, stronger, faster, and more environmentally sustainable.Molecular Engineering for Mechanically Resilient and Stretchable Electronic Polymers and Composites Establishing the design criteria for elasticity and ductility in conjugated polymers and composites by analysis of the structural determinants of the mechanical…
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Technology Impact Forecasting for Multi-Functional Composites

Aerospace & Defense Technology: December 2019

  • Magazine Article
  • 19AERP12_09
Published 2019-12-01 by SAE International in United States

Multi-functional composites offer a possible solution to the conflicting design goals of making new aircraft lighter, stronger, faster, and more environmentally sustainable.

To survive within today's stringent economic environment, aircraft design, particularly military aircraft design, has been experiencing a paradigm shift from an emphasis on design for optimum performance to design for system effectiveness. As a consequence, designers and manufacturers are increasingly considering the addition of new technologies to aircraft design to reduce their cost, increase their operating capacities, and optimize new capabilities.

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