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ASTM D6742/D6742M-02(2007)

(Practice)

Standard Practice for Filled-Hole Tension and Compression Testing of Polymer Matrix Composite Laminates

Standard Practice for Filled-Hole Tension and Compression Testing of Polymer Matrix Composite Laminates

SIGNIFICANCE AND USE
This practice provides supplemental instructions that allow Test Methods D 5766/D 5766M (for tension testing) and D 6484/D 6484M (for compression testing) to determine filled-hole tensile and compressive strength data for material specifications, research and development, material design allowables, and quality assurance. Factors that influence filled-hole tensile and compressive strengths and shall therefore be reported include the following: material, methods of material fabrication, accuracy of lay-up, laminate stacking sequence and overall thickness, specimen geometry (including hole diameter, diameter-to-thickness ratio, and width-to-diameter ratio), specimen preparation (especially of the hole), fastener-hole clearance, fastener type, fastener geometry, fastener installation method, fastener torque (if appropriate), countersink depth (if appropriate), specimen conditioning, environment of testing, specimen alignment and gripping, speed of testing, time at temperature, void content, and volume percent reinforcement. Properties that result include the following:
5.1.1 Filled-hole tensile (FHT) strength, Fxfhtu.
5.1.2 Filled-hole compressive (FHC) strength, Fxfhcu.
SCOPE
1.1 This practice provides instructions for modifying open-hole tension and compression test methods to determine filled-hole tensile and compressive strengths. The composite material forms are limited to continuous-fiber reinforced polymer matrix composites in which the laminate is both symmetric and balanced with respect to the test direction. The range of acceptable test laminates and thicknesses are described in .
1.2 This practice supplements Test Methods D 5766/D 5766M (for tension testing) and D 6484/D 6484M (for compression testing) with provisions for testing specimens that contain a close-tolerance fastener or pin installed in the hole. Several important test specimen parameters (for example, fastener selection, fastener installation method, and fastener hole tolerance) are not mandated by this practice; however, repeatable results require that these parameters be specified and reported.
1.3 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.
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
30-Apr-2007
ICS
83.120 - Reinforced plastics
Technical Committee
D30 - Composite Materials
Drafting Committee
D30.05 - Structural Test Methods
Current Stage
Ref Project

Relations

Replaces
ASTM D6742/D6742M-02 - Standard Practice for Filled-Hole Tension and Compression Testing of Polymer Matrix Composite Laminates
Effective Date
01-May-2007
Replaced By
ASTM D6742/D6742M-07 - Standard Practice for Filled-Hole Tension and Compression Testing of Polymer Matrix Composite Laminates
Effective Date
15-Oct-2007
Referred By
ASTM D8387/D8387M-21 - Standard Test Method for High Bypass – Low Bearing Interaction Response of Polymer Matrix Composite Laminates
Effective Date
01-May-2007
Referred By
ASTM D4762-18 - Standard Guide for Testing Polymer Matrix Composite Materials
Effective Date
01-May-2007
Referred By
ASTM D8509/D8509M-23 - Standard Guide for Test Method Selection and Test Specimen Design for Bolted Joint Related Properties
Effective Date
01-May-2007
Referred By
ASTM D6484/D6484M-20 - Standard Test Method for Open-Hole Compressive Strength of Polymer Matrix Composite Laminates
Effective Date
01-May-2007

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ASTM D6742/D6742M-02(2007) - Standard Practice for Filled-Hole Tension and Compression Testing of Polymer Matrix Composite LaminatesASTM D6742/D6742M-02(2007) - Standard Practice for Filled-Hole Tension and Compression Testing of Polymer Matrix Composite Laminates
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ASTM D6742/D6742M-02(2007) - Standard Practice for Filled-Hole Tension and Compression Testing of Polymer Matrix Composite Laminates
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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:D6742/D6742M–02(Reapproved2007)
Standard Practice for
Filled-Hole Tension and Compression Testing of Polymer
1
Matrix Composite Laminates
This standard is issued under the fixed designation D6742/D6742M; 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.
1. Scope D792 TestMethodsforDensityandSpecificGravity(Rela-
tive Density) of Plastics by Displacement
1.1 This practice provides instructions for modifying open-
D883 Terminology Relating to Plastics
hole tension and compression test methods to determine
D3171 TestMethodsforConstituentContentofComposite
filled-hole tensile and compressive strengths. The composite
Materials
material forms are limited to continuous-fiber reinforced poly-
D3878 Terminology for Composite Materials
mermatrixcompositesinwhichthelaminateisbothsymmetric
D5229/D5229M Test Method for Moisture Absorption
and balanced with respect to the test direction. The range of
Properties and Equilibrium Conditioning of Polymer Ma-
acceptable test laminates and thicknesses are described in
trix Composite Materials
8.2.1.
D 5766/D 5766M Test Method for Open Hole Tensile
1.2 This practice supplements Test Methods D 5766/
Strength of Polymer Matrix Composite Laminates
D5766M (for tension testing) and D6484/D6484M (for
D6484/D6484M TestMethodforOpen-HoleCompressive
compressiontesting)withprovisionsfortestingspecimensthat
Strength of Polymer Matrix Composite Laminates
contain a close-tolerance fastener or pin installed in the hole.
D6507 PracticeforFiberReinforcementOrientationCodes
Several important test specimen parameters (for example,
for Composite Materials
fastener selection, fastener installation method, and fastener
E6 Terminology Relating to Methods of Mechanical Test-
hole tolerance) are not mandated by this practice; however,
ing
repeatableresultsrequirethattheseparametersbespecifiedand
E177 Practice for Use of the Terms Precision and Bias in
reported.
ASTM Test Methods
1.3 The values stated in either SI units or inch-pound units
E456 Terminology Relating to Quality and Statistics
are to be regarded separately as standard. Within the text the
E 1309 Guide for Identification of Fiber-Reinforced
inch-pound units are shown in brackets. The values stated in
Polymer-Matrix Composite Materials in Databases
each system are not exact equivalents; therefore, each system
E1434 GuideforRecordingMechanicalTestDataofFiber-
must be used independently of the other. Combining values
Reinforced Composite Materials in Databases
from the two systems may result in nonconformance with the
standard.
3. Terminology
1.4 This standard does not purport to address all of the
3.1 Definitions—TerminologyD3878definestermsrelating
safety concerns, if any, associated with its use. It is the
to high-modulus fibers and their composites. Terminology
responsibility of the user of this standard to establish appro-
D883 defines terms relating to plastics. Terminology E6
priate safety and health practices and determine the applica-
defines terms relating to mechanical testing. Terminology
bility of regulatory limitations prior to use.
E456 and Practice E177 define terms relating to statistics. In
2. Referenced Documents the event of a conflict between terms, Terminology D3878
2
shall have precedence over the other standards.
2.1 ASTM Standards:
3.2 Definitions of Terms Specific to This Standard:
NOTE 1—If the term represents a physical quantity, its analytical
1
This practice is under the jurisdiction ofASTM Committee D30 on Composite
dimensionsarestatedimmediatelyfollowingtheterm(orlettersymbol)in
Materials , and is the direct responsibility of Subcommittee D30.05 on Structural
fundamental dimension form, using the following ASTM International
Test Methods.
standard symbology for fundamental dimensions, shown within square
Current edition approved May 1, 2007. Published June 2007. Originally
brackets:[M]formass,[L]forlength,[T]fortime,[u]forthermodynamic
approvedin2001.Lastpreviouseditionapprovedin2002asD6742/D6742M–02.
2
temperature,and[nd]fornondimensionalquantities.Useofthesesymbols
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM is restricted to analytical dimensions when used with square brackets, as
Standards volume information, refer to the standard’s Document Summary page on
the symbols may have other definitions when used without the brackets.
the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1

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1.1 This practice provides instructions for modifying open-hole tension and compression test methods to determine filled-hole tensile and compressive strengths. The composite material forms are limited to continuous-fiber reinforced polymer matrix composites in which the laminate is both symmetric and balanced with respect to the test direction. The range of acceptable test laminates and thicknesses are described in 8.2.1.  
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5.1 Refer to Guide D8509.
SCOPE
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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.  
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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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Standard Test Method for Open-Hole Tensile Strength of Polymer Matrix Composite Laminates

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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Standard Test Method for Measuring the Damage Resistance of a Fiber-Reinforced Polymer-Matrix Composite to a Concentrated Quasi-Static Indentation Force

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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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