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ASTM C273/C273M-07

(Test Method)

Standard Test Method for Shear Properties of Sandwich Core Materials

Standard Test Method for Shear Properties of Sandwich Core Materials

SCOPE
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. Within the text the inch-pound units are shown in brackets. The values stated in each system are not exact equivalents; therefore, each system must be used independently of the other. Combining values from the two systems may result in nonconformance with the standard.
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.

General Information

Status
Historical
Publication Date
31-Mar-2007
ICS
83.120 - Reinforced plastics
Technical Committee
D30 - Composite Materials
Drafting Committee
D30.09 - Sandwich Construction
Current Stage
Ref Project

Relations

Replaces
ASTM C273/C273M-06 - Standard Test Method for Shear Properties of Sandwich Core Materials
Effective Date
01-Apr-2007
Replaced By
ASTM C273/C273M-07a - Standard Test Method for Shear Properties of Sandwich Core Materials
Effective Date
01-Oct-2007
Referred By
ASTM E1730-19 - Standard Specification for Rigid Foam for Use in Structural Sandwich Panel Cores
Effective Date
01-Apr-2007
Referred By
ASTM E1749-18 - Standard Terminology Relating to Rigid Wall Relocatable Shelters
Effective Date
01-Apr-2007
Referred By
ASTM D7249/D7249M-20 - Standard Test Method for Facesheet Properties of Sandwich Constructions by Long Beam Flexure
Effective Date
01-Apr-2007
Referred By
ASTM D7446-09(2017) - Standard Specification for Structural Insulated Panel (SIP) Adhesives for Laminating Oriented Strand Board (OSB) to Rigid Cellular Polystryene Thermal Insulation Core Materials
Effective Date
01-Apr-2007
Referred By
ASTM E1974-19 - Standard Specification for Shelter, Electrical Equipment S-250/G
Effective Date
01-Apr-2007
Referred By
ASTM E1975-22 - Standard Specification for Shelter, Electrical, Equipment S-280/G
Effective Date
01-Apr-2007
Referred By
ASTM C394/C394M-16 - Standard Test Method for Shear Fatigue of Sandwich Core Materials
Effective Date
01-Apr-2007
Referred By
ASTM D4762-18 - Standard Guide for Testing Polymer Matrix Composite Materials
Effective Date
01-Apr-2007

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ASTM C273/C273M-07 - Standard Test Method for Shear Properties of Sandwich Core MaterialsASTM C273/C273M-07 - Standard Test Method for Shear Properties of Sandwich Core Materials
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ASTM C273/C273M-07 - Standard Test Method for Shear Properties of Sandwich Core Materials
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Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation:C273/C273M–07
Standard Test Method for
1
Shear Properties of Sandwich Core Materials
This standard is issued under the fixed designation C 273/C 273M; the number immediately following the designation indicates the year
of original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval.
A superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope D 883 Terminology Relating to Plastics
D 2584 Test Method for Ignition Loss of Cured Reinforced
1.1 This test method covers the determination of shear
Resins
properties of sandwich construction core materials associated
D 2734 Test Methods for Void Content of Reinforced Plas-
with shear distortion of planes parallel to the facings. It covers
tics
the determination of shear strength parallel to the plane of the
D 3171 Test Methods for Constituent Content of Composite
sandwich, and the shear modulus associated with strains in a
Materials
plane normal to the facings.The test may be conducted on core
D 3878 Terminology for Composite Materials
materials bonded directly to the loading plates or the sandwich
D 5229/D 5229M Test Method for Moisture Absorption
facings bonded to the plates. Permissible core material forms
Properties and Equilibrium Conditioning of Polymer Ma-
include those with continuous bonding surfaces (such as balsa
trix Composite Materials
wood and foams) as well as those with discontinuous bonding
D 5687/D 5687M Guide for Preparation of Flat Composite
surfaces (such as honeycomb).
Panels with Processing Guidelines for Specimen Prepara-
1.2 The values stated in either SI units or inch-pound units
tion
are to be regarded separately as standard. Within the text the
D 5961/D 5961M Test Method for Bearing Response of
inch-pound units are shown in brackets. The values stated in
Polymer Matrix Composite Laminates
each system are not exact equivalents; therefore, each system
E4 Practices for Force Verification of Testing Machines
must be used independently of the other. Combining values
E6 Terminology Relating to Methods of Mechanical Test-
from the two systems may result in nonconformance with the
ing
standard.
E 122 Practice for Calculating Sample Size to Estimate,
1.3 This standard does not purport to address all of the
With a Specified Tolerable Error, the Average for a
safety concerns, if any, associated with its use. It is the
Characteristic of a Lot or Process
responsibility of the user of this standard to establish appro-
E 177 Practice for Use of the Terms Precision and Bias in
priate safety and health practices and determine the applica-
ASTM Test Methods
bility of regulatory limitations prior to use.
E 456 Terminology Relating to Quality and Statistics
2. Referenced Documents E 1309 Guide for Identification of Fiber-Reinforced
2
Polymer-Matrix Composite Materials in Databases
2.1 ASTM Standards:
E 1434 GuideforRecordingMechanicalTestDataofFiber-
C 271/C 271M Test Method for Density of Core Sandwich
Reinforced Composite Materials in Databases
Materials
E 1471 Guide for Identification of Fibers, Fillers, and Core
C 274 Terminology of Structural Sandwich Constructions
Materials in Computerized Material Property Databases
C 393 Test Method for Flexural Properties of Sandwich
Constructions
3. Terminology
D 792 TestMethodsforDensityandSpecificGravity(Rela-
3.1 Definitions—TerminologyD 3878definestermsrelating
tive Density) of Plastics by Displacement
to high-modulus fibers and their composites. Terminology
C 274 defines terms relating to structural sandwich construc-
1
This test method is under the jurisdiction of ASTM Committee D30 on
tions. Terminology D 883 defines terms relating to plastics.
Composite Materials and is the direct responsibility of Subcommittee D30.09 on
TerminologyE6 defines terms relating to mechanical testing.
Sandwich Construction.
Terminology E 456 and Practice E 177 define terms relating to
Current edition approved April 1, 2007. Published April 2007. Originally
statistics.Intheeventofaconflictbetweenterms,Terminology
approved in 1951. Last previous edition approved in 2006 as C 273 – 06.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
D 3878 shall have precedence over the other terminologies.
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
3.2 Symbols:
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1

---------------------- Page: 1 ----------------------
C273/C273M–07
b = width of specimen bonded and co-cured facings in sandwich panels with the same
CV = coeffi
...

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5.1 Refer to Guide D8509.
SCOPE
1.1 This test method determines the fastener pull-through resistance of multidirectional polymer matrix composites reinforced by high-modulus fibers. Fastener pull-through resistance is characterized by the force-versus-displacement response exhibited when a mechanical fastener is pulled through a composite plate, with the force applied perpendicular to the plane of the plate. The composite material forms are limited to continuous-fiber or discontinuous-fiber (tape or fabric, or both) reinforced composites for which the laminate is symmetric and balanced with respect to the test direction. The range of acceptable test laminates and thicknesses is defined in 8.2.  
1.2 Two test procedures and configurations are provided. The first, Procedure A, is suitable for screening and fastener development purposes. The second, Procedure B, is configuration-dependent and is suitable for establishing design values. Both procedures can be used to perform comparative evaluations of candidate fasteners/fastener system designs.  
1.3 The specimens described herein may not be representative of actual joints which may contain one or more free edges adjacent to the fastener, or may contain multiple fasteners that can change the actual boundary conditions.  
1.4 This test method is consistent with the recommendations of CMH-17, which describes the desirable attributes of a fastener pull-through test method.  
1.5 Units—The values stated in either SI units or inch-pound 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.  
1.5.1 Within the text, the inch-pound units are shown in brackets.  
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SIGNIFICANCE AND USE
5.1 Refer to Guide D8509.
SCOPE
1.1 This test method determines the open-hole tensile strength of multidirectional polymer matrix composite laminates reinforced by high-modulus fibers. The composite material forms are limited to continuous-fiber or discontinuous-fiber (tape or fabric, or both) reinforced composites in which the laminate is balanced and symmetric with respect to the test direction. The range of acceptable test laminates and thicknesses are described in 8.2.1.  
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ASTM D6264/D6264M-23(Test Method)
Standard Test Method for Measuring the Damage Resistance of a Fiber-Reinforced Polymer-Matrix Composite to a Concentrated Quasi-Static Indentation Force

SIGNIFICANCE AND USE
5.1 Susceptibility to damage from concentrated out-of-plane forces is one of the major design concerns of many structures made of advanced composite laminates. Knowledge of the damage resistance properties of a laminated composite plate is useful for product development and material selection.  
5.2 QSI testing can serve the following purposes:  
5.2.1 To simulate the force-displacement relationships of impacts governed by boundary conditions (1-7).5 These are typically relatively large-mass low-velocity hard-body impacts on plates with a relatively small unsupported region. Since the test is run slowly in displacement control, the desired damage state can be obtained in a controlled manner. Associating specific damage events with a force during a drop-weight impact test is often difficult due to the oscillations in the force history. In addition, a specific sequence of damage events may be identified during quasi-static loading while the final damage state is only identifiable after a drop-weight impact test.  
5.2.2 To provide an estimate of the impact energy required to obtain a similar damage state for drop-weight impact testing if all others parameters are held constant.  
5.2.3 To establish quantitatively the effects of stacking sequence, fiber surface treatment, variations in fiber volume fraction, and processing and environmental variables on the damage resistance of a particular composite laminate to a concentrated indentation force.  
5.2.4 To compare quantitatively the relative values of the damage resistance parameters for composite materials with different constituents. The damage response parameters can include dent depth, damage dimensions and through-thickness locations, Fmax , Ea, and Emax, as well as the force versus indenter displacement curve.  
5.2.5 To impart damage in a specimen for subsequent damage tolerance tests, such as Test Method D7137/D7137M.  
5.2.6 To measure the indentation response of the specimen with and without bending us...
SCOPE
1.1 This test method determines the damage resistance of multidirectional polymer matrix composite laminated plates subjected to a concentrated indentation force (Fig. 1). Procedures are specified for determining the damage resistance for a test specimen supported over a circular opening and for a rigidly-backed test specimen. The composite material forms are limited to continuous-fiber reinforced polymer matrix composites, with the range of acceptable test laminates and thicknesses defined in 8.2. This test method may prove useful for other types and classes of composite materials.
FIG. 1 Quasi-Static Indentation Test  
1.1.1 Instructions for modifying these procedures to determine damage resistance properties of sandwich constructions are provided in Practice D7766/D7766M.  
1.2 A flat, square composite plate is subjected to an out-of-plane, concentrated force by slowly pressing a hemispherical indenter into the surface. The damage resistance is quantified in terms of a critical contact force to cause a specific size and type of damage in the specimen.  
1.3 The test method may be used to screen materials for damage resistance, or to inflict damage into a specimen for subsequent damage tolerance testing. The indented plate can be subsequently tested in accordance with Test Method D7137/D7137M to measure residual strength properties. Drop-weight impact per Test Method D7136/D7136M may be used as an alternate method of creating damage from an out-of-plane force and measuring damage resistance properties.  
1.4 The damage resistance properties generated by this test method are highly dependent upon several factors, which include specimen geometry, layup, indenter geometry, force, and boundary conditions. Thus, results are generally not scalable to other configurations, and are particular to the combination of geometric and physical conditions tested.  
1.5 Units—The values stated in either SI units or inch-pound u...

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    11 pages
    English language
    sale 15% off