Due to the very large number of tests offered, descriptions of those most commonly requested have been gathered into the following groups:

ASTM C365 – Flatwise Compressive Properties of Sandwich Cores

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ASTM C365 testing covers the determination of compressive strength and modulus of sandwich cores. These material properties are determined for the design purposes in a direction normal to the plane of facings as the core would be placed in a structural sandwich construction. Acceptable core material forms include material with continuous bonding surfaces (such as balsa wood and foams) as well as those with discontinuous bonding surfaces (such as honeycomb).

The sandwich core will be subjected to a uniaxial compressive force normal to the plane of the facings as the core will be placed in a structural sandwich construction. The force is transmitted to the core sandwich using loading platens. The deflectomer protrudes through a hole machined in the center of the specimen. This measures the deflection of the specimen and is used to calculate strain throughout the test.

The results of ASTM C365, flatwise compressive strength and modulus, are fundamental mechanical properties of sandwich cores that are used in the design of sandwich panels. These mechanical properties can, in turn, be used in design purposes, material specifications, research and development applications and quality assurance.

Please email or call (304) 547-5800 for information regarding test procedures, specimen size, pricing or any other ASTM C365 questions you may have.

Reference: Standard Test Method for Flatwise Compressive Properties of Sandwich Cores