ASTM E990 - 13

    Standard Specification for Core-Splice Adhesive for Honeycomb Sandwich Structural Panels

    Active Standard ASTM E990 | Developed by Subcommittee: E06.53

    Book of Standards Volume: 04.11


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    Abstract

    This specification covers the requirements for core-splice adhesive for use with nonmetallic honeycomb cores in the fabrication of honeycomb sandwich panels used in relocatable structures. The adhesive shall be thermosetting, of film form, and capable of expanding to several times its original thickness and shall be cured at specific curing time, temperature, and pressure. Materials shall be tested for physical properties qualification which shall conform to water migration, volatility, expansion, sag, density, flexural shear strength or assembly compatibility, and tube shear or core splice integrity requirements. The adhesive shall be suitable for application to core material, edge members, and integral parts.

    This abstract is a brief summary of the referenced standard. It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application. ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date.

    1. Scope

    1.1 This specification covers core-splice adhesive for use with nonmetallic honeycomb cores in the fabrication of honeycomb sandwich panels used in relocatable structures. The adhesive shall be used for new production or depot repair. The adhesive shall be suitable for forming bonds that can withstand long combinations of stress, temperature, and relative humidity expected to be encountered in service. The adhesive shall be used for bonding core segments and for bonding core segments to edge members and to integral members in a honeycomb sandwich panel. The adhesive shall not allow the transfer of water from one part of the panel to another either through or along the line of the adhesive.

    1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.

    1.3 The following precautionary caveat pertains only to the test method portion, Section 6, of this specification: This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.


    2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

    ASTM Standards

    B209 Specification for Aluminum and Aluminum-Alloy Sheet and Plate

    C393/C393M Test Method for Core Shear Properties of Sandwich Constructions by Beam Flexure

    D792 Test Methods for Density and Specific Gravity (Relative Density) of Plastics by Displacement

    E631 Terminology of Building Constructions

    E864 Practice for Surface Preparation of Aluminum Alloys to Be Adhesively Bonded in Honeycomb Shelter Panels

    E865 Specification for Structural Film Adhesives for Honeycomb Sandwich Panels

    E874 Practice for Adhesive Bonding of Aluminum Facings to Nonmetallic Honeycomb Core for Shelter Panels

    E1091 Specification for Nonmetallic Honeycomb Core for Use in Shelter Panels

    E1749 Terminology Relating to Rigid Wall Relocatable Shelters

    Military Standards

    MIL-S-8802 Sealing Compound, Temperature-Resistant, Integral Fuel Tanks, and Fuel Cell Cavities, High-Adhesion

    Federal Standards

    QQ-A-250/11d Aluminum Alloy 6061T6, Plate and Sheet

    QQ-A-250/4 Aluminum Alloy 2024, Plate and Sheet

    QQ-A-250/8d Aluminum Alloy 5052H34, Plate and Sheet


    ICS Code

    ICS Number Code 83.180 (Adhesives)

    UNSPSC Code

    UNSPSC Code 30103500(Honeycomb core); 31200000(Adhesives and sealants)


    DOI: 10.1520/E0990

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