ASTM D8069-17a
(Test Method)Standard Test Method for Determining Flexural Modulus of Full Section Pultruded Fiber Reinforced Polymer (FRP) Composite Members with Doubly Symmetric Cross Sections under Bending
Standard Test Method for Determining Flexural Modulus of Full Section Pultruded Fiber Reinforced Polymer (FRP) Composite Members with Doubly Symmetric Cross Sections under Bending
SIGNIFICANCE AND USE
5.1 Determination of flexural modulus by this test method is especially useful for quality control and specification purposes.
5.2 Experimental values for flexural modulus will vary with specimen depth, span length, loading rate, ambient test temperature, and other atmospheric conditions.
5.3 Before proceeding with this test method, reference should be made to the specification of the material being tested, including constituent materials of the specimen. Any test specimen preparation, environmental or loading conditioning, dimensions, or testing parameters covered in the material specification, or both, shall take precedence over those mentioned in this test method. If there are no material specifications, then these default conditions apply. Table 1 in Classification D4000 lists the ASTM materials standards that currently exist.
SCOPE
1.1 This test method covers the determination of Flexural Modulus of pultruded open and closed fiber reinforced polymer (FRP) composites of doubly symmetrical cross sections (sections having geometric symmetry about both the major and minor axes) about their geometric centroid subjected to flexure and shear. This test method utilizes a three-point loading system applied to a simply supported beam.
1.2 The values stated in SI units are to be regarded as the standard. The values provided in parentheses are for information only.
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: The is no known ISO equivalent to this standard.
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.
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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.
Designation: D8069 − 17a
Standard Test Method for
Determining Flexural Modulus of Full Section Pultruded
Fiber Reinforced Polymer (FRP) Composite Members with
1
Doubly Symmetric Cross Sections under Bending
This standard is issued under the fixed designation D8069; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope* D3878Terminology for Composite Materials
D4000Classification System for Specifying Plastic Materi-
1.1 This test method covers the determination of Flexural
als
Modulusofpultrudedopenandclosedfiberreinforcedpolymer
D4762Guide for Testing Polymer Matrix Composite Mate-
(FRP) composites of doubly symmetrical cross sections (sec-
rials
tions having geometric symmetry about both the major and
E4Practices for Force Verification of Testing Machines
minoraxes)abouttheirgeometriccentroidsubjectedtoflexure
E6Terminology Relating to Methods of MechanicalTesting
and shear. This test method utilizes a three-point loading
E177Practice for Use of the Terms Precision and Bias in
system applied to a simply supported beam.
ASTM Test Methods
1.2 The values stated in SI units are to be regarded as the
E691Practice for Conducting an Interlaboratory Study to
standard. The values provided in parentheses are for informa-
Determine the Precision of a Test Method
tion only.
E1309 Guide for Identification of Fiber-Reinforced
1.3 This standard does not purport to address all of the
Polymer-MatrixCompositeMaterialsinDatabases(With-
3
safety concerns, if any, associated with its use. It is the drawn 2015)
responsibility of the user of this standard to establish appro-
E1434Guide for Recording Mechanical Test Data of Fiber-
priate safety, health, and environmental practices and deter- ReinforcedCompositeMaterialsinDatabases(Withdrawn
3
mine the applicability of regulatory limitations prior to use.
2015)
E2309/E2309MPractices for Verification of Displacement
NOTE 1—The is no known ISO equivalent to this standard.
Measuring Systems and Devices Used in MaterialTesting
1.4 This international standard was developed in accor-
Machines
dance with internationally recognized principles on standard-
ization established in the Decision on Principles for the
3. Terminology
Development of International Standards, Guides and Recom-
3.1 Definitions—Terminology D3878 defines terms relating
mendations issued by the World Trade Organization Technical
to high-modulus fibers and their composites. Terminology
Barriers to Trade (TBT) Committee.
D883definestermsrelatingtoplastics.TerminologyE6defines
terms relating to mechanical testing. In the event of a conflict
2. Referenced Documents
between terms, Terminology D3878 shall have precedence
2
2.1 ASTM Standards:
over the other terminologies.
D883Terminology Relating to Plastics
3.2 Definitionsofvariablesusedincalculationsasshownin
D790Test Methods for Flexural Properties of Unreinforced
Section 11 and 12 are as follows:
and Reinforced Plastics and Electrical Insulating Materi-
P > 20% of estimated ultimate load, N (lbf)
als
20%
4 4
I = moment of inertia about the neutral axis, mm (in. )
L = test span length, mm (in.)
h = total height of test specimen, mm (in.)
1
ThistestmethodisunderthejurisdictionofASTMCommitteeD20onPlastics
P > 5% of estimated ultimate load, N (lbf)
5%
and is the direct responsibility of Subcommittee D20.18 on Reinforced Thermoset-
P = load value used to calculate E, N (lbf)
ting Plastics.
δ = deflection value used to calculate E, mm (in.)
Current edition approved Dec. 1, 2017. Published January 2018. Originally
δ > deflection at 20% of estimated ultimate load, mm (in.)
20%
approved in 2017. Last previous edition approved in 2017 as D8069–17. DOI:
δ > deflection at 5% of estimated ultimate load, mm (in.)
5%
10.1520/D8069-17A.
2
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
3
Standards volume information, refer to the standard’s Document Summary page on The last approved version of this historical standard is referenced on
the ASTM website. www.astm.org.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
D8069 − 17a
6. Apparatus
E = Flexural modulus, MPa (psi)
6.1 Testing Machine—A properly installed and operated
4. Summary of Test Method
hyd
...
This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: D8069 − 17 D8069 − 17a
Standard Test Method for
Determining Flexural Modulus of Full Section Pultruded
Fiber Reinforced Polymer (FRP) Composite Members with
1
Doubly Symmetric Cross Sections under Bending
This standard is issued under the fixed designation D8069; 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.
1. Scope Scope*
1.1 This test method covers the determination of Flexural Modulus of pultruded open and closed fiber reinforced polymer (FRP)
composites of doubly symmetrical cross sections about (sections having geometric symmetry about both the major and minor axes)
about their geometric centroid subjected to flexure and shear. This test method utilizes a three-point loading system applied to a
simply supported beam.
1.2 The values stated in SI units are to be regarded as the standard. The values provided in parentheses are for information only.
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 safety, health, and healthenvironmental practices and determine the
applicability of regulatory limitations prior to use.
NOTE 1—The is no known ISO equivalent to this standard.
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.
2. Referenced Documents
2
2.1 ASTM Standards:
D883 Terminology Relating to Plastics
D790 Test Methods for Flexural Properties of Unreinforced and Reinforced Plastics and Electrical Insulating Materials
D3878 Terminology for Composite Materials
D4000 Classification System for Specifying Plastic Materials
D4762 Guide for Testing Polymer Matrix Composite Materials
D7290 Practice for Evaluating Material Property Characteristic Values for Polymeric Composites for Civil Engineering
Structural Applications
E4 Practices for Force Verification of Testing Machines
E6 Terminology Relating to Methods of Mechanical Testing
E177 Practice for Use of the Terms Precision and Bias in ASTM Test Methods
E691 Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
3
E1309 Guide for Identification of Fiber-Reinforced Polymer-Matrix Composite Materials in Databases (Withdrawn 2015)
3
E1434 Guide for Recording Mechanical Test Data of Fiber-Reinforced Composite Materials in Databases (Withdrawn 2015)
E2309/E2309M Practices for Verification of Displacement Measuring Systems and Devices Used in Material Testing Machines
3. Terminology
3.1 Definitions—Terminology D3878 defines terms relating to high-modulus fibers and their composites. Terminology D883
defines terms relating to plastics. Terminology E6 defines terms relating to mechanical testing. In the event of a conflict between
terms, Terminology D3878 shall have precedence over the other terminologies.
1
This test method is under the jurisdiction of ASTM Committee D20 on Plastics and is the direct responsibility of Subcommittee D20.18 on Reinforced Thermosetting
Plastics.
Current edition approved Jan. 1, 2017Dec. 1, 2017. Published January 2017January 2018. Originally approved in 2017. Last previous edition approved in 2017 as
D8069–17. DOI: 10.1520/D8069-17.10.1520/D8069-17A.
2
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 Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
3
The last approved version of this historical standard is referenced on www.astm.org.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
D8069 − 17a
3.2 Definitions of variables used in calculations as shown in Section 11 and 12 are as follows:
P > 20% of estimated ultimate load, N (lbf)
20%
4 4
I = moment of inertia about the neutral axis, mm (in. )
L = test span length, mm (in.)
h = total height of test specimen, mm (in.)
P > 5
...
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