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ASTM D8069-17

(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 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 and health practices and determine the applicability of regulatory limitations prior to use.

General Information

Status
Historical
Publication Date
31-Dec-2016
ICS
83.120 - Reinforced plastics
Technical Committee
D20 - Plastics
Drafting Committee
D20.18 - Reinforced Thermosetting Plastics
Current Stage
Ref Project

Relations

Replaced By
ASTM D8069-17a - Standard Test Method for Determining Flexural Modulus of Full Section Pultruded Fiber Reinforced Polymer (FRP) Composite Members with Doubly Symmetric Cross Sections under Bending
Effective Date
01-Dec-2017
Referred By
ASTM D7745-19 - Standard Practice for Testing Pultruded Composites
Effective Date
01-Jan-2017

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ASTM D8069-17 - Standard Test Method for Determining Flexural Modulus of Full Section Pultruded Fiber Reinforced Polymer (FRP) Composite Members with Doubly Symmetric Cross Sections under BendingASTM D8069-17 - Standard Test Method for Determining Flexural Modulus of Full Section Pultruded Fiber Reinforced Polymer (FRP) Composite Members with Doubly Symmetric Cross Sections under Bending
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ASTM D8069-17 - Standard Test Method for Determining Flexural Modulus of Full Section Pultruded Fiber Reinforced Polymer (FRP) Composite Members with Doubly Symmetric Cross Sections under Bending
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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: D8069 − 17
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 E6Terminology Relating to Methods of MechanicalTesting
E177Practice for Use of the Terms Precision and Bias in
1.1 This test method covers the determination of Flexural
ASTM Test Methods
Modulusofpultrudedopenandclosedfiberreinforcedpolymer
E691Practice for Conducting an Interlaboratory Study to
(FRP) composites of doubly symmetrical cross sections about
Determine the Precision of a Test Method
their geometric centroid subjected to flexure and shear. This
E1309 Guide for Identification of Fiber-Reinforced
test method utilizes a three-point loading system applied to a
Polymer-Matrix Composite Materials in Databases(With-
simply supported beam.
3
drawn 2015)
1.2 The values stated in SI units are to be regarded as the
E1434Guide for Recording Mechanical Test Data of Fiber-
standard. The values provided in parentheses are for informa-
ReinforcedCompositeMaterialsinDatabases(Withdrawn
3
tion only.
2015)
1.3 This standard does not purport to address all of the E2309/E2309MPractices for Verification of Displacement
safety concerns, if any, associated with its use. It is the
Measuring Systems and Devices Used in MaterialTesting
responsibility of the user of this standard to establish appro- Machines
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
2. Referenced Documents
to high-modulus fibers and their composites. Terminology
2
2.1 ASTM Standards:
D883definestermsrelatingtoplastics.TerminologyE6defines
D883Terminology Relating to Plastics terms relating to mechanical testing. In the event of a conflict
D790Test Methods for Flexural Properties of Unreinforced
between terms, Terminology D3878 shall have precedence
and Reinforced Plastics and Electrical Insulating Materi- over the other terminologies.
als
3.2 Definitionsofvariablesusedincalculationsasshownin
D3878Terminology for Composite Materials
Section 11 and 12 are as follows:
D4000Classification System for Specifying Plastic Materi-
P > 20% of estimated ultimate load, N (lbf)
20%
als 4 4
I = moment of inertia about the neutral axis, mm (in. )
D4762Guide for Testing Polymer Matrix Composite Mate-
L = test span length, mm (in.)
h = total height of test specimen, mm (in.)
rials
P > 5% of estimated ultimate load, N (lbf)
5%
D7290Practice for Evaluating Material Property Character-
P = load value used to calculate E, N (lbf)
isticValues for Polymeric Composites for Civil Engineer-
δ = deflection value used to calculate E, mm (in.)
δ > deflection at 20% of estimated ultimate load, mm (in.)
20%
ing Structural Applications
δ > deflection at 5% of estimated ultimate load, mm (in.)
5%
E4Practices for Force Verification of Testing Machines
E = Flexural modulus, MPa (psi)
4. Summary of Test Method
1
ThistestmethodisunderthejurisdictionofASTMCommitteeD20onPlastics
4.1 The full-scale specimen rests on two rounded solid
and is the direct responsibility of Subcommittee D20.18 on Reinforced Thermoset-
metal cylindrical supports or pivoted end supports and is
ting Plastics.
Current edition approved Jan. 1, 2017. Published January 2017. DOI: 10.1520/
loadedbymeansofaloadingramlocatedmidwaybetweenthe
D8069-17.
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.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
D8069 − 17
supports. The beam span-to-depth ratio (L/h) should be within 6.3 Loading Nose—The transverse loading at the center of
the range of 20 ≤ L/h ≤ 32 to determine the flexural modulus. the test specimen span shall be applied through a metal block
1
with 4 in. width (along the length of the beam specimen) by ⁄2
4.2 The maximum load placed on the specimen shall be
in. thick, with rounded edges or with a radius of curvature
approximately equal to 20 percent of the estimated ultimate
approximately equal to two times the beam specimen dept
...

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This specification covers glass-fiber reinforced polyester plastic panels intended for use in construction. Light transmitting panels covered by this specification are divided into two types, based on relative response to a laboratory flammability test: Type CC1 for limited flammability and Type CC2 for general purpose. These types may be further subdivided by grades based on relative response to weathering tests: Grade 1 for weather resistance and Grade 2 for general purpose. The polyester resin used in the panels shall be a thermosetting styrenated and acrylated polyester resin composed of polymeric esters in which the recurring ester groups are an integral part of the main polymer chain. The resin shall be reinforced with glass fibers. The polyester resin may contain additives for various purposes. The materials shall be tested for water absorption, tensile strength, linear thermal expansion, and flexural strength.
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Standard Specification for Contact Molded “Fiberglass” (Glass Fiber Reinforced Thermosetting Resin) Ducts

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This specification covers the material and design requirements, and fabrication of ducts and hoods made of "fiberglass" (glass fiber reinforced thermosetting resin) consisting of a polyester, vinyl ester, or other qualified resin-matrix systems with fiber reinforcement manufactured by contact molding, intended for use in handling corrosive fumes and process gases. Special attention is given to equipment that operates at specified temperatures with regard to strength and corrosion resistance. This specification does not address the selection of resins and reinforcements for specific chemical environments.
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4.1 The results obtained by this practice shall serve as a guide in, but not as the sole basis for, selection of a thermosetting resin used in an RTP structure. No attempt has been made to incorporate into the practice all the various factors that will potentially affect the serviceability of an RTP structure when subjected to chemical environments. These factors will potentially include stress, different resin-to-glass ratios, and multiple veils.
SCOPE
1.1 This practice is designed to evaluate, in an unstressed state, the chemical resistance of thermosetting resins used in the fabrication of reinforced thermosetting plastic (RTP) laminates. This practice provides for the determination of changes in the properties, described as follows, of the test specimens and test reagent after exposure of the specimens to the reagent: hardness of specimens, weight change thickness, appearance of specimens, appearance of immersion media, and flexural strength and modulus.  
1.1.1 This practice is also useful to evaluate other factors, such as surfacing veils and the effect of resin additives, on the chemical resistance of the resin.  
1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.
Note 1: There is no known ISO equivalent to this standard.  
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