ASTM D3518/D3518M-94(2007)
(Test Method)Standard Test Method for In-Plane Shear Response of Polymer Matrix Composite Materials by Tensile Test of a ±45° Laminate
Standard Test Method for In-Plane Shear Response of Polymer Matrix Composite Materials by Tensile Test of a ±45° Laminate
SIGNIFICANCE AND USE
This test method is designed to produce in-plane shear property data for material specifications, research and development, quality assurance, and structural design and analysis. Factors that influence the shear response and should therefore be reported include the following: material, methods of material preparation and lay-up, specimen stacking sequence and overall thickness, specimen preparation, specimen conditioning, environment of testing, specimen alignment and gripping, speed of testing, time at temperature, void content, and volume percent reinforcement. Properties that may be derived from this test method include the following:
5.1.1 In-plane shear stress versus shear strain response,
5.1.2 In-plane shear chord modulus of elasticity,
5.1.3 Offset shear properties,
5.1.4 Maximum in-plane shear stress for a ±45° laminate, and
5.1.5 Maximum in-plane shear strain for a ±45° laminate.
SCOPE
1.1 This test method determines the in-plane shear response of polymer matrix composite materials reinforced by high-modulus fibers. The composite material form is limited to a continuous-fiber-reinforced composite ±45° laminate capable of being tension tested in the laminate direction.
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.
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.
General Information
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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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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: D3518/D3518M − 94(Reapproved 2007)
Standard Test Method for
In-Plane Shear Response of Polymer Matrix Composite
1
Materials by Tensile Test of a 645° Laminate
This standard is issued under the fixed designation D3518/D3518M; 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 (´) 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 E177Practice for Use of the Terms Precision and Bias in
ASTM Test Methods
1.1 This test method determines the in-plane shear response
E456Terminology Relating to Quality and Statistics
of polymer matrix composite materials reinforced by high-
E1309 Guide for Identification of Fiber-Reinforced
modulus fibers. The composite material form is limited to a
Polymer-Matrix Composite Materials in Databases
continuous-fiber-reinforced composite 645° laminate capable
E1434Guide for Recording Mechanical Test Data of Fiber-
of being tension tested in the laminate χ direction.
Reinforced Composite Materials in Databases
1.2 This standard does not purport to address all of the
E1471Guide for Identification of Fibers, Fillers, and Core
safety concerns, if any, associated with its use. It is the
Materials in Computerized Material Property Databases
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica-
3. Terminology
bility of regulatory limitations prior to use.
3.1 Definitions—Terminology D3878 defines terms relating
1.3 The values stated in either SI units or inch-pound units
to high-modulus fibers and their composites. Terminology
are to be regarded separately as standard. Within the text the
D883definestermsrelatingtoplastics.TerminologyE6defines
inch-pound units are shown in brackets. The values stated in
terms relating to mechanical testing. Terminology E456 and
each system are not exact equivalents; therefore, each system
Practice E177 define terms relating to statistics. In the event of
must be used independently of the other. Combining values
a conflict between terms, Terminology D3878 shall have
from the two systems may result in nonconformance with the
precedence over the other standards.
standard.
3.2 Definitions of Terms Specific to This Standard:
2. Referenced Documents
NOTE 1—If the term represents a physical quantity, its analytical
2 dimensionsarestatedimmediatelyfollowingtheterm(orlettersymbol)in
2.1 ASTM Standards:
fundamental dimension form, using the following ASTM standard sym-
D883Terminology Relating to Plastics
bology for fundamental dimensions, shown within square brackets: [M]
D3039/D3039MTestMethodforTensilePropertiesofPoly-
formass,[L]forlength,[T]fortime,[Θ]forthermodynamictemperature,
and[nd]fornondimensionalquantities.Useofthesesymbolsisrestricted
mer Matrix Composite Materials
to analytical dimensions when used with square brackets, as the symbols
D3878Terminology for Composite Materials
may have other definitions when used without the brackets.
D5229/D5229MTestMethodforMoistureAbsorptionProp-
3.2.1 645° laminate—in laminated composites, a balanced,
erties and Equilibrium Conditioning of Polymer Matrix
symmetric lay-up composed only of+45° plies and−45° plies.
Composite Materials
(See also ply orientation.)
E6Terminology Relating to Methods of MechanicalTesting
3.2.2 balanced, adj—in laminated composites, having, for
E111Test Method for Young’s Modulus, Tangent Modulus,
everyoff-axisplyorientedat+θ,anotherplyorientedat−θthat
and Chord Modulus
is of the same material system and form.
3.2.3 lamina, n—pl. laminae, in laminated composites,a
1
This test method is under the jurisdiction of ASTM Committee D30 on
single, thin, uniform layer that is the basic building block of a
Composite Materials and is the direct responsibility of Subcommittee D30.04 on
laminate. (Syn. ply ).
Lamina and Laminate Test Methods.
3.2.4 material coordinate system, n—in laminated
Current edition approved May 1, 2007. Published June 2007. Originally
composites, a 123 Cartesian coordinate system describing the
approved in 1976. Last previous edition approved in 2001 as D3518/
D3518M–94(2001). DOI: 10.1520/D3518_D3518M-94R07.
principle material coordinate system for a laminated material,
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
where the 1-axis is aligned with the ply principal axis, as
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
illustrated in Fig. 1. (See also ply orientation, ply principal
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. axis, and principal material coordin
...
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