EUROLAB laboratory provides testing and compliance services within the scope of ASTM C273 standard. The ASTM C273 standard covers the determination of the shear properties of sandwich construction core materials associated with shear distortion of planes parallel to the claddings. It covers the determination of shear strength parallel to the sandwich plane and the shear modulus associated with deformations in a plane perpendicular to the pavements.
The test can be performed on core materials bonded directly to the loading plates or on sandwich skins bonded to the plates.
Core cutting properties are key features used in the design of sandwich panels. This test method provides information on the load-deflection behavior of sandwich structures or cores when loaded with shear parallel to the plane of the pavements. From a full load-deflection curve it is possible to calculate the core shear stress at any load (eg to calculate shear stress and an effective core shear modulus at proportional limit, yield or maximum load).
The test does not produce pure shear, but the sample length is determined so that secondary stresses have minimal effect. Approximate shear properties can also be obtained from a sandwich bending test. This test method provides a standard method for obtaining sandwich core cutting data for quality control, acceptance specification testing, sandwich design, and research and development.
Shear force is applied on a sandwich core or sandwich panel parallel to the plane of its faces. The force is transmitted through the sample by bonded loading plates. The displacement results in a shear force on the sandwich core. This test method also includes determining the shear modulus associated with strains in a plane perpendicular to the pavements. Core shear modulus, stress, and strength are reported in terms of the nominal shear area of the core.
This test method provides a standard method for obtaining sandwich core cutting data for material properties, sandwich panel design, research and development, and quality assurance. Before performing ASTM C273, it is important to read the entire specification in the relevant ASTM publication.
The ASTM C273 shear assembly is specifically designed to test shear in both tension and compression. The fixture has a swivel joint that allows the apparatus to self-align during testing. The sandwich panels can be glued directly to the fixture, or there is a small step that comes out and can support the specimen while the test is done in compression. A contact strain gauge is sometimes used for this test, but this is not very common.
Values stated in SI units should be accepted as standard. Inch-pound units given may be approximate.
This standard does not purport to address all, if any, safety concerns associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and to determine the applicability of regulatory restrictions prior to use.
Our organization, EUROLAB, provides standard test method services for the cutting properties of sandwich core materials, within the framework of national and international standards, with its trained and expert staff and advanced technological equipment, among numerous test, measurement, analysis and evaluation studies. Provides testing services within the scope of ASTM C273 standard.
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