ASTM D3916-02
(Test Method)Standard Test Method for Tensile Properties of Pultruded Glass-Fiber-Reinforced Plastic Rod
Standard Test Method for Tensile Properties of Pultruded Glass-Fiber-Reinforced Plastic Rod
SIGNIFICANCE AND USE
The high axial-tensile strength and the low transverse-compressive strength of pultruded rod combine to present some unique problems in determining the tensile strength of this material with conventional test grips. The high transverse-compressive forces generated in the conventional method of gripping tend to crush the rod, thereby causing premature failure. In this test method, aluminum-alloy tabs contoured to the shape of the rod reduce the compressive forces imparted to the rod, thus overcoming the deleterious influence of conventional test grips.
Tensile properties are influenced by specimen preparation, strain rate, thermal history, and the environmental conditions at the time of testing. Consequently, where precise comparative results are desired, these factors must be carefully controlled.
Tensile properties provide useful data for many engineering design purposes. However, due to the high sensitivity of these properties to strain rate, temperature, and other environmental conditions, data obtained by this test method should not, by themselves, be considered for applications involving load-time scales or environmental conditions that differ widely from the test conditions. In cases where such dissimilarities are apparent, the sensitivities to strain rate, including impact and creep, as well as to environment, should be determined over a wide range of conditions as dictated by the anticipated service requirements.
SCOPE
1.1 This test method describes a procedure for determining the tensile properties of pultruded, glass-fiber-reinforced thermosetting plastic rod of diameters ranging from 3.2 mm (1/ 8 in.) to 25.4 mm (1 in.). Little test specimen preparation is required; however, reusable aluminum tab grip adapters (Fig. 1) of appropriate size are required to prevent premature failure of the specimens at the grips.
1.2 The values stated in SI units are to be regarded as the standard. The values given 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. Specific hazards statements are given in Note 3 and Note 4.
Note 1—There is no known ISO equivalent to this test method.
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Standards Content (Sample)
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Designation:D3916–02
Standard Test Method for
Tensile Properties of Pultruded Glass-Fiber-Reinforced
1
Plastic Rod
This standard is issued under the fixed designation D 3916; 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 gripping tend to crush the rod, thereby causing premature
failure. In this test method, aluminum-alloy tabs contoured to
1.1 This test method describes a procedure for determining
the shape of the rod reduce the compressive forces imparted to
the tensile properties of pultruded, glass-fiber-reinforced ther-
the rod, thus overcoming the deleterious influence of conven-
1
mosettingplasticrodofdiametersrangingfrom3.2mm( ⁄8in.)
tional test grips.
to 25.4 mm (1 in.). Little test specimen preparation is required;
3.2 Tensile properties are influenced by specimen prepara-
however, reusable aluminum tab grip adapters (Fig. 1)of
tion, strain rate, thermal history, and the environmental condi-
appropriatesizearerequiredtopreventprematurefailureofthe
tions at the time of testing. Consequently, where precise
specimens at the grips.
comparative results are desired, these factors must be carefully
1.2 The values stated in SI units are to be regarded as the
controlled.
standard. The values given in parentheses are for information
3.3 Tensile properties provide useful data for many engi-
only.
neering design purposes. However, due to the high sensitivity
1.3 This standard does not purport to address all of the
of these properties to strain rate, temperature, and other
safety concerns, if any, associated with its use. It is the
environmental conditions, data obtained by this test method
responsibility of the user of this standard to establish appro-
should not, by themselves, be considered for applications
priate safety and health practices and determine the applica-
involving load-time scales or environmental conditions that
bility of regulatory limitations prior to use. Specific hazards
differ widely from the test conditions. In cases where such
statements are given in Note 3 and Note 4.
dissimilarities are apparent, the sensitivities to strain rate,
NOTE 1—There is no known ISO equivalent to this test method.
including impact and creep, as well as to environment, should
be determined over a wide range of conditions as dictated by
2. Referenced Documents
the anticipated service requirements.
2.1 ASTM Standards:
2
D 618 Practice for Conditioning Plastics for Testing
4. Apparatus
2
D 638 Test Method for Tensile Properties of Plastics
4.1 Water-Cooled Diamond or Tungsten-Carbide Saw, for
3
E4 Practices for Force Verification of Testing Machines
cutting rod to size.
E83 Practice for Verification and Classification of Exten-
4.2 Micrometer, reading to at least 0.025 6 0.000 mm
3
someters
(0.001 6 0.000 in.), for measuring the width and thickness of
thetestspecimens.Thethicknessofnonrigidplasticsshouldbe
3. Significance and Use
measured with a dial micrometer that exerts a pressure of 25 6
3.1 The high axial-tensile strength and the low transverse-
kPa(3.6 60.7psi)onthespecimenandmeasuresthethickness
compressivestrengthofpultrudedrodcombinetopresentsome
to within 0.025 mm (0.001 in.). The anvil of the micrometer
unique problems in determining the tensile strength of this
shall be at least 30 mm (1.4 in.) in diameter and parallel to the
material with conventional test grips. The high transverse-
face of the contact foot.
compressive forces generated in the conventional method of
4.3 Universal Testing Machine, verified in accordance with
PracticesE4, having a capacity of at least 530 kN (120 000
lbf) to permit the testing of 25.4 mm (1 in.) diameter rod.
1
This test method is under the jurisdiction ofASTM Committee D20 on Plastics
Smaller-diameter rod may be tested on lower-capacity equip-
and is the direct responsibility of Subcommittee D20.18 on Reinforced Thermoset-
ting Plastics.
ment, commensurate with the anticipated tensile strength of
Current edition approved March 10, 2002. Published May 2002. Originally
such rod.
published as D 3916 – 80. Last previous edition D 3916 – 94.
2
4.4 Extensometer—A suitable instrument for determining
Annual Book of ASTM Standards, Vol 08.01.
3
Annual Book of ASTM Standards, Vol 03.01. the distance between two designated points located within the
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D3916–02
NOTE 1—Sandblast Clamp Face with 100-mesh Carbide at 100
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