ASTM C273/C273M-16
Standard Test Method for Shear Properties of Sandwich Core Materials
- Standard No.
- ASTM C273/C273M-16
- Release Date
- 2016
- Published By
- American Society for Testing and Materials (ASTM)
- Status
- Replace By
- ASTM C273/C273M-18
- Latest
- ASTM C273/C273M-20
- Scope
5.1 The core shear properties are fundamental properties that are used in the design of sandwich panels. This test method provides information on the force-deflection behavior of sandwich constructions or cores when loaded in shear parallel to the plane of the facings. From a complete force-deflection curve, it is possible to compute core shear stress at any force (such as the shear stress at proportional limit, at yield, or at maximum force) and to compute an effective core shear modulus.
5.2 The test does not produce pure shear, but the specimen length is prescribed so that secondary stresses have a minimum effect. Approximate shear properties can also be obtained from a sandwich flexure test (see Test Method C393).
5.3 This test method provides a standard method of obtaining sandwich core shear data for material specifications, sandwich panel design, research and development applications, and quality assurance.
5.4 Factors that influence core shear strength and shall therefore be reported include the following: facing material, core material, adhesive material, methods of material fabrication, core geometry (density, cell size, orientation, etc.), adhesive thickness, specimen geometry and associated measurement accuracy, specimen preparation, specimen conditioning, environment of testing, specimen alignment, loading procedure, speed of testing, and adhesive void content. Further, core-to-facing strength may be different between precured/bonded and co-cured facings in sandwich panels with the same core and facing material.
1.1 This test method covers the determination of shear properties of sandwich construction core materials associated with shear distortion of planes parallel to the facings. It covers the determination of shear strength parallel to the plane of the sandwich, and the shear modulus associated with strains in a plane normal to the facings. The test may be conducted on core materials bonded directly to the loading plates or the sandwich facings bonded to the plates. 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.
ASTM C273/C273M-16 Referenced Document
- ASTM C271/C271M Standard Test Method for Density of Sandwich Core Materials
- ASTM C393 Standard Test Method for Flexural Properties of Sandwich Constructions
- ASTM D2584 Standard Test Method for Ignition Loss of Cured Reinforced Resins
- ASTM D2734 Standard Test Methods for Void Content of Reinforced Plastics
- ASTM D3171 Standard Test Methods for Constituent Content of Composite Materials
- 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 D5687/D5687M Standard Guide for Preparation of Flat Composite Panels with Processing Guidelines for Specimen Preparation
- ASTM D5961/D5961M Standard Test Method for Bearing Response of Polymer Matrix Composite Laminates
- ASTM D792 Standard Test Methods for Density and Specific Gravity (Relative Density) of Plastics by Displacement
- 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 E177 Standard Practice for Use of the Terms Precision and Bias in ASTM Test Methods
- ASTM E4 Standard Practices for Force Verification of Testing Machines
- ASTM E456 Standard Terminology for Relating to Quality and Statistics
- ASTM E6 Standard Terminology Relating to Methods of Mechanical Testing
ASTM C273/C273M-16 history
- 2020 ASTM C273/C273M-20 Standard Test Method for Shear Properties of Sandwich Core Materials
- 2019 ASTM C273/C273M-19 Standard Test Method for Shear Properties of Sandwich Core Materials
- 2018 ASTM C273/C273M-18 Standard Test Method for Shear Properties of Sandwich Core Materials
- 2016 ASTM C273/C273M-16 Standard Test Method for Shear Properties of Sandwich Core Materials
- 2011 ASTM C273/C273M-11 Standard Test Method for Shear Properties of Sandwich Core Materials
- 2007 ASTM C273/C273M-07a Standard Test Method for Shear Properties of Sandwich Core Materials
- 2007 ASTM C273/C273M-07 Standard Test Method for Shear Properties of Sandwich Core Materials
- 2006 ASTM C273/C273M-06 Standard Test Method for Shear Properties of Sandwich Core Materials
- 2000 ASTM C273-00e1 Standard Test Method for Shear Properties of Sandwich Core Materials
