ASTM D7249/D7249M-20
Standard Test Method for Facesheet Properties of Sandwich Constructions by Long Beam Flexure

Standard No.

ASTM D7249/D7249M-20

Release Date

2020

Published By

American Society for Testing and Materials (ASTM)

Latest

ASTM D7249/D7249M-20

Scope

1.1 This test method covers determination of facesheet properties of flat sandwich constructions subjected to flexure in such a manner that the applied moments produce curvature of the sandwich facesheet planes and result in compressive and tensile forces in the facesheets. 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 Units—The values stated in either SI units or inchpound units are to be regarded separately as standard. The values stated in each system are not necessarily exact equivalents; therefore, to ensure conformance with the standard, each system shall be used independently of the other, and values from the two systems shall not be combined. 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. NOTE 1—Alternate procedures for determining the compressive strength of unidirectional polymer matrix composites materials in a sandwich beam configuration may be found in Test Method D5467/ D5467M. 1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

ASTM D7249/D7249M-20 Referenced Document

• ASTM C273/C273M Standard Test Method for Shear Properties of Sandwich Core Materials*， 2024-04-21 Update
• ASTM C393/C393M Standard Test Method for Core Shear Properties of Sandwich Constructions by Beam Flexure*， 2020-07-01 Update
• ASTM D3410/D3410M Standard Test Method for Compressive Properties of Polymer Matrix Composite Materials with Unsupported Gage Section by Shear Loading
• 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 D5467/D5467M Standard Test Method for Compressive Properties of Unidirectional Polymer Matrix Composites Using a Sandwich Beam
• ASTM D7250/D7250M Standard Practice for Determining Sandwich Beam Flexural and Shear Stiffness*， 2020-07-01 Update
• 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 E1237 Standard Guide for Installing Bonded Resistance Strain Gages
• ASTM E177 Standard Practice for Use of the Terms Precision and Bias in ASTM Test Methods
• ASTM E251 Standard Test Methods for Performance Characteristics of Metallic Bonded Resistance Strain Gages
• 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 D7249/D7249M-20 history

• 2020 ASTM D7249/D7249M-20 Standard Test Method for Facesheet Properties of Sandwich Constructions by Long Beam Flexure
• 2018 ASTM D7249/D7249M-18 Standard Test Method for Facesheet Properties of Sandwich Constructions by Long Beam Flexure
• 2016 ASTM D7249/D7249M-16e1 Standard Test Method for Facing Properties of Sandwich Constructions by Long Beam Flexure
• 2016 ASTM D7249/D7249M-16 Standard Test Method for Facing Properties of Sandwich Constructions by Long Beam Flexure
• 2012 ASTM D7249/D7249M-12e1 Standard Test Method for Facing Properties of Sandwich Constructions by Long Beam Flexure
• 2012 ASTM D7249/D7249M-12 Standard Test Method for Facing Properties of Sandwich Constructions by Long Beam Flexure
• 2006 ASTM D7249/D7249M-06 Standard Test Method for Facing Properties of Sandwich Constructions by Long Beam Flexure