ASTM C366/C366M-11
Standard Test Methods for Measurement of Thickness of Sandwich Cores

Standard No.

ASTM C366/C366M-11

Release Date

2011

Published By

American Society for Testing and Materials (ASTM)

Status

Be replaced

Replace By

ASTM C366/C366M-16

Latest

ASTM C366/C366M-16(2022)e1

Scope

Normally, a close tolerance is desirable for core thickness so that sandwich panels may be manufactured with all the sandwich components fitting properly and without crushing the core.

These test methods are designed for measuring thickness of core as it is produced and are not intended for use in determining dimensions of core specimens for other tests.

These test methods provide standard methods of obtaining the core thickness of flat sandwich core materials, and provide a basis for determining average thickness dimensions. The thickness properties derived may be used in design properties, material specifications, research and development applications, and quality assurance.

Factors that influence core thickness measurement and shall therefore be reported include the following: core material through-thickness rigidity, surface roughness, specimen geometry (including warpage), specimen preparation, methods of dimensional measurement, specimen conditioning, and moisture content during dimensional measurements.

1.1 These test methods cover plant manufacturing procedures for measuring the thickness of flat sandwich cores. 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). The two test methods covered include the following:

1.1.1 Test Method A8212;Roller-Type Thickness Tester.

1.1.2 Test Method B8212;Disk-Type Thickness Tester.

Note 18212;These test methods are designed for measuring thickness of core as it is produced and are not intended for use in determining dimensions of core specimens for other tests.

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.

ASTM C366/C366M-11 Referenced Document

• ASTM C274 Standard Terminology of Structural Sandwich Constructions
• ASTM D3878 Standard Terminology Composite Materials
• ASTM D5229/D5229M Standard Test Method for Moisture Absorption Properties and Equilibrium Conditioning of Polymer Matrix Composite Materials
• ASTM D883 Standard Terminology Relating to Plastics
• ASTM E122 Standard Practice for Calculating Sample Size to Estimate, With a Specified Tolerable Error, the Average for Characteristic of a Lot or Process
• ASTM E1309 Standard Guide for Identification of Fiber-Reinforced Polymer-Matrix Composite Materials in Databases
• ASTM E1434 Standard Guide for Recording Mechanical Test Data of Fiber-Reinforced Composite Materials in Databases
• ASTM E1471 Standard Guide for Identification of Fibers, Fillers, and Core Materials in Computerized Material Property Databases
• ASTM E171 Standard Specification for Standard Atmospheres for Conditioning and Testing Flexible Barrier Materials
• ASTM E177 Standard Practice for Use of the Terms Precision and Bias in ASTM Test Methods
• ASTM E456 Standard Terminology for Relating to Quality and Statistics

ASTM C366/C366M-11 history

• 2022 ASTM C366/C366M-16(2022)e1 Standard Test Methods for Measurement of Thickness of Sandwich Cores
• 2016 ASTM C366/C366M-16 Standard Test Methods for Measurement of Thickness of Sandwich Cores
• 2011 ASTM C366/C366M-11 Standard Test Methods for Measurement of Thickness of Sandwich Cores
• 2005 ASTM C366/C366M-05 Standard Test Methods for Measurement of Thickness of Sandwich Cores
• 1999 ASTM C366-99 Standard Test Methods for Measurement of Thickness of Sandwich Cores