Browse Topic: Adhesives and sealants

Items (900)

Moisture absorption behavior and hygrothermal aging life prediction for CFRP adhesive-bonded joints

2022-01-038903/29/2022

Effects of moisture absorption on the strength degradation, energy absorption and failure mechanism of CFRP laminates and the adhesive-bonded joints in hygrothermal environment were investigated in this work. Experiments of accelerated moisture absorption, uniaxial tension and three-point bending were performed. SEM observations on the CFRP laminates and the fracture surfaces of the CFRP bonded joints were conducted. Strength degradation and failure mechanism induced by moisture absorption were discussed in detail. The results showed that the strength degradation in tension and in three-point bending of the CFRP laminate due to moisture absorption reached 7.4% and 17.1%, respectively. Different response of CFRP laminate and adhesive layer to the moisture determined the failure mode of the adhesive-bonded joints. Suitable match of CFRP laminate and adhesive was very important to make the failure mode of the joint under control.

Xu, Xianghe, Yu, HaiYan, Xing, Ping

Adhesion Promoter for Polysulfide Sealing Compounds

AMS3100E-TEST-REC (Historical)10/19/2021

This specification covers adhesion promoters in liquid form for use with aerospace sealing compounds.

AMS G9 Aerospace Sealing Committee

Adhesion Promoter for Polysulfide Sealing Compounds

AMS3100E (Current)

10/19/2021

This specification covers adhesion promoters in liquid form for use with aerospace sealing compounds.

AMS G9 Aerospace Sealing Committee

Insulating Component, Molded, Electrical, Heat Shrinkable, Connector and Cable Accessory, Sealing Strain Relief, General Specification For

AS5258A-TEST-REC (Historical)10/13/2021

This specification covers connector and cable accessory heat shrinkable, electrical insulating, molded components fabricated from various polymer based compositions. These components are intended for use as connector and cable accessory components to provide strain relief, electrical insulation, and environmental sealing.

AE-8C1 Connectors Committee

Insulating Component, Molded, Electrical, Heat Shrinkable, Connector and Cable Accessory, Sealing Strain Relief, General Specification For

AS5258A (Current)10/13/2021

This specification covers connector and cable accessory heat shrinkable, electrical insulating, molded components fabricated from various polymer based compositions. These components are intended for use as connector and cable accessory components to provide strain relief, electrical insulation, and environmental sealing.

AE-8C1 Connectors Committee

Evolution of A356 with flyash composites on metallurgical mechanical and tribological behaviour under dry and wet conditions

2021-28-027210/01/2021

Among all metal matrix composites, A356 is the most applicable matrix due to its low density and exhibits nominal strength with soft nature. This proposed study is concerned with examination of mechanical and tribological behaviour of virgin A356 alloy and A356 reinforcement with 10wt.% power plant waste flyash particles composites were processed by liquid metallurgy stir casting technique. The fabricated composites expose enhanced higher hardness and compare the virgin A356 alloy due to presents of flyash particles in the matrix. The wear and friction behaviour of casted samples was tested in pin on disk tribometer apparatus under dry and wet sliding environment at the presence of lubricant (SAE 80W-90) by varying sliding load of 10N-40N and sliding velocity of 1-3 m/s respectively. Wear rate increase with the increasing load and sliding velocity. The usage of lubricant tends to decrease the wear rate by reducing the friction when compared to dry sliding method. This was ascribed due

R, Soundararajan, A, Sathishkumar, Kalaiarasan, Kaviyarasan, Kumar K, Sathish

Sealing Compound, Topcoat, Fuel Tank, Buna-N Type

AMSS4383C-TEST-REC (Historical)06/29/2021

This specification covers one type of one-component, air-drying protective coating which cures at room temperature.

AMS G9 Aerospace Sealing Committee

Sealing Compound, Topcoat, Fuel Tank, Buna-N Type

AMSS4383C (Current)

06/29/2021

This specification covers one type of one-component, air-drying protective coating which cures at room temperature.

AMS G9 Aerospace Sealing Committee

Sealing Compound, Non-Curing, Fluorosilicone Groove Injection Temperature and Fuel Resistant

AMS3376D-TEST-REC (Historical)06/01/2021

This specification covers a permanently mastic, non-curing fluorosilicone sealing compound in the form of a paste.

AMS G9 Aerospace Sealing Committee

Sealing Compound, Non-Curing, Fluorosilicone Groove Injection Temperature and Fuel Resistant

AMS3376D (Current)

06/01/2021

This specification covers a permanently mastic, non-curing fluorosilicone sealing compound in the form of a paste.

AMS G9 Aerospace Sealing Committee

Temporary Protective Coating and Remover

AMS7202-TEST-REC (Historical)05/13/2021

This specification establishes requirements for a temporary protective coating (TPC) intended to protect aluminum surfaces from damage and corrosion. This specification also establishes requirements for an alkaline remover used to strip the specified TPCs.

AMS G8 Aerospace Organic Coatings Committee

Temporary Protective Coating and Remover

AMS7202 (Current)

05/13/2021

This specification establishes requirements for a temporary protective coating (TPC) intended to protect aluminum surfaces from damage and corrosion. This specification also establishes requirements for an alkaline remover used to strip the specified TPCs.

AMS G8 Aerospace Organic Coatings Committee

Unidirectional Carbon Fiber Tape Epoxy Repair Prepreg, Vacuum Curing Part 5 - Material Specification for Unidirectional Carbon Fiber Tape Epoxy Prepreg for Repair and Film Adhesive for Repair, 120 to 145 °C (250 to 290 °F) Curing

AMS6885/5 (Current)02/22/2021

AMS6885/5 is the Material Specification (MS) which defines the requirements of a unidirectional carbon fiber tape epoxy repair prepreg capable of curing under vacuum for repair of carbon fiber reinforced epoxy structures. It also defines the requirements of an epoxy film adhesive to be applied in a co-bonding process with the prepreg for solid laminate and sandwich bonding.

AMS CACRC Commercial Aircraft Composite Repair Committee

Wafer-Scale Membrane Release Process

TBMG-3847602/01/2021

Precise measurements utilizing sensitive instruments may require thermally managed detectors; therefore, thermal insulation of the detector is essential to its performance. To maintain critical signal-to-noise ratio, there is a need for larger thermal isolation structures. Due to high detector filling fraction limits, these isolation structures may be thinner, less mechanically robust, and more prone to breakage during fabrication.

Induction Cure Test for Metal Bonding Adhesives

J1851_202101 (Current)

01/07/2021

This SAE Recommended Practice defines a procedure for determining the adhesion strength characteristics of heat-cured metal bonding adhesives subjected to induction heating.

Materials, Processes and Parts Council

Surface Match Verification Method for Pressure Sensitive Adhesively Attached Components

J2215_202101 (Current)

01/07/2021

This SAE Recommended Practice applies to evaluation of the conformance match condition existing between two surfaces. Evaluation of this conformance may be especially useful in bonded applications although it may also have relevance to bolted adjacent surface joint conditions. Since good bonding surface conformity is necessary for providing optimal bond performance with pressure sensitive adhesives, the purpose of this document is to provide a method of evaluating the conformance match of the mating surfaces. This document is intended as a guide toward standard practice but may be subject to frequent change to keep pace with experience and technical advances. This should be kept in mind when considering the use of this document. Tool types, materials, application tools, and component contact area evaluation methods are included as part of this document. In most cases a visual evaluation of contact performance may be satisfactory; however, for greater accuracy a measurement tool may be

Materials, Processes and Parts Council

Electrocoat Compatibilities of Automotive Sealers

J1969_202101 (Current)

01/07/2021

This SAE Recommended Practice sets forth a method for determining the compatibility of automotive sealers with cathodic electrocoat primer.

Materials, Processes and Parts Council

Peel Strength of Soft Trim Adhesives

J1679_202101 (Current)

01/07/2021

This SAE Recommended Practice shall be used to determine the peel strength achieved by an adhesive when used to bond various decorative, flexible substrates such as cloth supported vinyl or carpet, to rigid (steel), semi-rigid (SMC plastic), or other similar substrates.

Materials, Processes and Parts Council

Overlap Shear Test for Sealant Adhesive Bonding of Automotive Glass Encapsulating Material to Body Opening

J1836_202101 (Current)

01/07/2021

This recommended practice defines a procedure for the construction of a lap shear specimen for the purpose of testing the bondability of an automotive sealant adhesive to the elastomeric material used in automotive encapsulating. The present practice of encapsulating automotive glass is described as molding elastomeric material onto the outer edge of the glass using thermoplastic or thermosetting material that quickly sets in the mold. The glass is removed from the mold with cured elastomeric material bonded to the perimeter of thee glass. This encapsulated glass module can now be bonded with a sealant adhesive into the body opening of a vehicle.

Materials, Processes and Parts Council

Overlap Shear Test for Automotive Type Sealant for Stationary Glass Bonding

J1529_202101 (Current)

01/07/2021

This SAE Recommended Practice defines a procedure for the construction and testing of glass to metal lap shears for determining shear strength of sealant adhesives for automotive stationary glass bonding. This procedure can also be used for fiber reinforced plastic (FRP) when used in place of metal.

Materials, Processes and Parts Council

Sealing Compound, Flame Resistant, Non-Silicone

AMS3381B-TEST-REC (Historical)10/14/2020

This specification covers non-silicone synthetic rubber sealing compounds supplied as a two-component system that cures at room temperature.

AMS G9 Aerospace Sealing Committee

Sealing Compound, Flame Resistant, Non-Silicone

AMS3381B (Historical)

10/14/2020

This specification covers non-silicone synthetic rubber sealing compounds supplied as a two-component system that cures at room temperature.

AMS G9 Aerospace Sealing Committee

Method Turns Nearly any Object into a Data Storage Unit

TBMG-3780510/01/2020

Living beings contain their own assembly and operating instructions in the form of DNA. That's not the case with inanimate objects. Anyone wishing to 3D-print an object also requires a set of instructions. If they then choose to print that same object again years later, they need access to the original digital information; the object itself does not store the printing instructions.

Sealing Compound, Polysulfide (T) Rubber, Fuel Resistant, Non-Chromated Corrosion Inhibiting for Intermittent Use to 360 °F (182 °C)

AMS3265F-TEST-REC (Historical)09/09/2020

This specification covers polysulfide rubber sealing compounds containing only non-chromated corrosion inhibitors, supplied as a two-component system which cures at room temperature.

AMS G9 Aerospace Sealing Committee

Sealing Compound, Polysulfide (T) Rubber, Fuel Resistant, Non-Chromated Corrosion Inhibiting for Intermittent Use to 360 °F (182 °C)

AMS3265F (Current)

09/09/2020

This specification covers polysulfide rubber sealing compounds containing only non-chromated corrosion inhibitors, supplied as a two-component system which cures at room temperature.

AMS G9 Aerospace Sealing Committee

REPAIR SLEEVE, PRIMARY WIRE INSULATION DAMAGE, ELECTRIC, PERMANENT, ENVIRONMENT RESISTANT, 150 °C MAXIMUM OPERATING TEMPERATURE

AS6224/1 (Current)08/17/2020

AE-8C2 Terminating Devices and Tooling Committee

New Coating Process Lights Porous Electronics and Sensors

08/01/2020

Researchers have shown how to coat glass and plastic with porous titanium dioxide. The fabrication process is straightforward, the materials are cheap, and the ceramic’s gas sensing performance is considerably improved compared with current devices.

Carbon Nanotube/Polymer Composites with Electrical and Thermal Characteristics

TBMG-3703906/01/2020

Materials used for military personal protection gear may also be tough enough for vehicles, potentially improving how unmanned vehicles dissipate energy. Researchers are studying the use of the polymers as matrix material for incorporation into lightweight composites in unmanned vehicle systems.

Method Enables Conductive Gels to Stick When Wet

TBMG-3685505/01/2020

Polymers that are good conductors of electricity could be useful in biomedical devices to help with sensing or electrostimulation, for example. But there has been a sticking point preventing their widespread use: their inability to adhere to a surface such as a sensor or microchip and stay put despite moisture from the body.

CONNECTOR, PLUG, ATTACHABLE, EXTERNAL ELECTRIC POWER, AIRCRAFT, 115/200 VOLT, 400 HERTZ

AS25486B (Current)04/17/2020

AE-8C1 Connectors Committee

Hybrid Forming - A Novel Manufacturing Technique for Metal-LFT Structural Parts

2020-01-023504/14/2020

Hybrid structural parts combining aluminum or steel sheets with long glass fiber reinforced thermoplastics (LFT) offer a great opportunity to reduce component weight for automotive applications. But due to high manufacturing cost, metal-LFT hybrid components are still scarcely used in automotive large-scale production. Thus in this work a novel cost- and time efficient manufacturing process for simultaneous metal sheet forming and compression molding of long fiber reinforced thermoplastics to manufacture automotive lightweight components is presented. In this manufacturing process, which is referred to as “Hybrid forming”, a fiber reinforced thermoplastic melt is used as a forming medium in the manner of well-known hydroforming processes. After forming the metal sheet by polymer melt in combination with the rigid die, the melt solidifies and forms a local reinforcement structure in the hybrid component. Since the metal sheet is pre-coated with a bonding agent prior to the forming

Heidrich, Daniel, Kloska, Tobias, Fang, Xiangfan

Experimental Study on Static and Fatigue Performance of Self-Piercing Riveted Joints and Adhesively Bonded Self-Piercing Riveted Joints Connecting Steel and Aluminum Components

2020-01-017704/14/2020

This paper describes an experimental study on the performance of self-piercing riveted (SPR) joints and adhesively bonded SPR joints connecting steel and aluminum components under both quasi-static and cyclic loading. The joint configurations cover a wide range of material gauges, types and grades. Two and three thickness joints, with and without adhesive are also part of this study. Load versus deflection behavior, load carrying capacity, fatigue life and the failure modes for each type of joint are discussed. This study focuses on the influence of dissimilar material and adhesives to the joint performance. In addition, comparison of load carrying capacity and fatigue strength between SPR and resistance spot welded joints is also discussed.

Guo, Mingchao, El-Tawil, Ghassan

Double-Sided Tape Rapidly Seals Tissues Together

TBMG-3638904/01/2020

Inspired by a sticky substance that spiders use to catch their prey, a double-sided tape was developed that can rapidly seal tissues together. The new tape can tightly bind tissues such as the lungs and intestines within five seconds. The tape could eventually be used in place of surgical sutures, which don’t work well in all tissues and can cause complications in some patients. The double-sided tape can also be used to attach implantable medical devices to tissues including the heart. In addition, it works much faster than tissue glues, which usually take several minutes to bind tightly and can drip onto other parts of the body.

Powder Particles for Corrosion Prevention in Rebar

TBMG-3638804/01/2020

Corrosion of reinforced steel in concrete structures is a significant problem for NASA due to the close proximity of the structures to salt spray from the nearby Atlantic Ocean. To minimize damage to such structures, coatings were developed that could be applied as liquids to the external surfaces of a substrate in which the metal structures were embedded. The new technology is a different approach to KSC’s Liquid Coating for Prevention of Corrosion in Rebar.

Eco-profiling of Bio-epoxies via Life Cycle Assessment

13-01-01-000303/25/2020

Epoxies, synthesized from bisphenol-A (BPA) and epichlorohydrin (ECH), are predominantly used as coatings, adhesives, and matrix material in fiber-reinforced composites for body-in-white (BiW) applications in the automotive sector. However, given the production of conventional epoxies from nonrenewable 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 “ecofriendly,” 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 (LCA) to determine the genuine credentials of their

Kousaalya, Adhimoolam Bakthavachalam, Iyer, Rakesh Krishnamoorthy, Pilla, Srikanth

Alternatives to Cadmium Plating

AIR4160B (Current)03/24/2020

To document and provide access to information obtained by an industry survey.

G-3, Aerospace Couplings, Fittings, Hose, Tubing Assemblies

Aerospace Standard Test Methods for Aerospace Sealants Two-Component Synthetic Rubber Compounds

AS5127/1D (Current)03/18/2020

This SAE Aerospace Standard (AS) describes test methods to determine the application and performance properties of two-component sealing compounds. It shall be used in conjunction with AS5127 and the applicable material specification. When modifications to these test methods are called out in material specifications, the material specification shall take precedence.

AMS G9 Aerospace Sealing Committee

Celebrating Women in Engineering & Science: Renee Bernstein, CEO, Cotronics Corporation

TBMG-3616703/01/2020

Cleaning and Preparation of Metal Surfaces

AMS03_2C (Current)02/25/2020

This SAE Standard specifies processes for the cleaning of metal surfaces to remove any extraneous or undesirable material or deposits at any stage of manufacture, storage or service and for the preparation of these surfaces for further treatment. Any necessary stress-relieving treatments are also included. This Standard does not override special preparatory procedures specified in individual Defence Standards, Defence Specifications, DTD Process Specifications, DG Ships Specifications and Naval Defence Standards. It also does not cover cleaning operations associated with the maintenance of internal combustion engines, the preliminary removal of heavy deposits of oil, grease, or dirt accumulated during operational service, preparations for welding and the cleaning of electrical contacts.

AMS B Finishes Processes and Fluids Committee

Q&A: Electrically Conductive Coated Yarn for Wearable, Washable Fabrics

TBMG-3598202/01/2020

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.

Threads Detect Gases When Woven into Clothing

TBMG-3598902/01/2020

A fabrication method was developed to create dyed threads that change color when they detect a variety of gases. The threads can be read visually or even more precisely by use of a smartphone camera, to detect changes of color due to analytes as low as 50 parts per million. Woven into clothing, the gas-detecting threads could provide a reusable, washable, and affordable safety asset in medical, workplace, military, and rescue environments.

Double-Sided Tape for Tissues Could Replace Surgical Sutures

TBMG-3578101/01/2020

Inspired by a sticky substance that spiders use to catch their prey, MIT engineers have designed a double-sided tape that can rapidly seal tissues together.

Breathable Electronic Skin Using Nanofiber Substrate

TBMG-3580701/01/2020

Wearable electronic devices for health monitoring using electronic skin have emerged but most electronic skin-related technologies utilize materials such as plastic or rubber that can cause skin irritation or interfere with metabolism when attached to skin or biological tissue.

Cleaning and Preparation of Metal Surfaces

AMS03_2B (Historical)12/17/2019

This SAE Standard specifies processes for the cleaning of metal surfaces to remove any extraneous or undesirable material or deposits at any stage of manufacture, storage or service and for the preparation of these surfaces for further treatment. Any necessary stress-relieving treatments are also included. This Standard does not override special preparatory procedures specified in individual Defence Standards, Defence Specifications, DTD Process Specifications, DG Ships Specifications and Naval Defence Standards. It also does not cover cleaning operations associated with the maintenance of internal combustion engines, the preliminary removal of heavy deposits of oil, grease, or dirt accumulated during operational service, preparations for welding and the cleaning of electrical contacts.

AMS B Finishes Processes and Fluids Committee

Novel Applications of Electrospinning Could Improve Devices

TBMG-3563612/01/2019

When you visit Andrew Steckl’s lab at the University of Cincinnati, you see a nondescript glass box that weaves together different fibers. He sees endless possibility.

Macro-Fiber Composite (MFC) Actuator

TBMG-3572412/01/2019

The Macro-Fiber Composite (MFC) actuator is a low-cost piezoelectric device designed for controlling vibration, noise, and deflections in composite structural beams and panels. It is an encapsulated, high-performance, in-plane, piezoelectric fiber composite strain device that consists of rectangular piezoelectric fibers sandwiched between layers of adhesive and electrode polyimide film.

Pearl-Like Coating Enhances Lightweight Armor

TBMG-3545311/01/2019

By mimicking the outer coating of pearls (nacre or mother of pearl), researchers created a lightweight plastic that is 14 times stronger and eight times lighter (less dense) than steel. It could be applicable to vests, helmets, and other types of body armor as well as protective armor for ships, helicopters, and other vehicles.

Primer, Anodic Electrodeposition for Aircraft Applications

AMS3144A (Current)10/17/2019

This specification establishes the requirements for a waterborne, corrosion inhibiting, chemical and solvent resistant, anodic electrodeposition epoxy primer capable of curing at 200 to 210 °F (93 to 99 °C).

AMS G8 Aerospace Organic Coatings Committee

Products of Tomorrow: October 2019

TBMG-3528610/01/2019

This column presents technologies that have applications in commercial areas, possibly creating the products of tomorrow. To learn more about each technology, see the contact information provided for that innovation.

Products of Tomorrow: September 2019

TBMG-3512309/01/2019

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