ASTM-C393/C393M 2016
$40.63
C393/C393M-16 Standard Test Method for Core Shear Properties of Sandwich Constructions by Beam Flexure
| Published By | Publication Date | Number of Pages |
| ASTM | 2016 | 8 |
ASTM C393/C393M-16
Historical Standard: Standard Test Method for Core Shear Properties of Sandwich Constructions by Beam Flexure
ASTM C393/C393M
Scope
1.1 This test method covers determination of the core shear properties of flat sandwich constructions subjected to flexure in such a manner that the applied moments produce curvature of the sandwich facing planes. Permissible core material forms include those with continuous bonding surfaces (such as balsa wood and foams) as well as those with discontinuous bonding surfaces (such as honeycomb).
1.2 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard.
1.2.1 Within the text the inch-pound units are shown in brackets.
1.3 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.
Keywords
A micrometer with a 4 to 7 mm [0.16 to 0.28 in.] nominal diameter ball-interface or a flat anvil interface shall be used to measure the specimen thickness. A ball interface is recommended for thickness measurements when facings are bonded to the core and at least one surface is irregular (e.g., the bag-side of a thin facing laminate that is neither smooth nor flat). A micrometer or caliper with a flat anvil interface is recommended for thickness measurements when facings are bonded to the core and both surfaces are smooth (e.g., tooled surfaces). A micrometer or caliper with a flat anvil interface shall be used for measuring length and width, as well as the specimen thickness when no facings are present. The use of alternative measurement devices is permitted if specified (or agreed to) by the test requestor and reported by the testing laboratory. The accuracy of the instruments shall be suitable for reading to within 1 %of the sample dimensions. For typical specimen geometries, an instrument with an accuracy of ± 0.025 mm [±0.001 in.] is adequate for the length, width, and thickness measurements.; bending stress; core modulus; core stress; facing stress; sandwich construction; sandwich deflection; shear stress;
ICS Code
ICS Number Code 83.120 (Reinforced plastics)
DOI: 10.1520/C0393_C0393M-16
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