ASTM D7992/D7992M-15
(Practice)Standard Practice for Elevated Temperature and Moisture Conditioning of Pultruded Fiber Reinforced Polymer (FRP) Composites Used in Structural Designs
Standard Practice for Elevated Temperature and Moisture Conditioning of Pultruded Fiber Reinforced Polymer (FRP) Composites Used in Structural Designs
SIGNIFICANCE AND USE
4.1 The elevated temperature and moisture conditioning procedures prescribed in this practice are designed to provide a standard procedure to be used to evaluate and compare the effect of elevated temperature and moisture conditioning under controlled laboratory conditions on pultruded FRP composites to be used in structural design applications. The conditioning procedures prescribed in this practice are designed to obtain reproducible results to compare and evaluate these materials but are not intended to produce equilibrium conditions or actual service conditions for these materials.
SCOPE
1.1 In general, it is feasible that the mechanical properties of FRP composites will be affected by environmental conditions such as exposure to moisture at elevated temperatures. In order to make reliable comparisons between different materials under elevated temperature and moisture environmental conditions, it is necessary to standardize the elevated temperature and moisture conditions to which specimens of these materials are subjected prior to and during testing. This practice defines procedures for elevated temperature and moisture conditioning of pultruded FRP composites intended for use in structural design applications. The conditioning medium representing elevated temperature and moisture exposure described in this standard practice is distilled water maintained at 37.8 ± 1.5°C (100 ± 3°F) for 1000 hours.
1.2 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 may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in nonconformance with the standard.
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
Relations
Standards Content (Sample)
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: D7992/D7992M − 15
Standard Practice for
Elevated Temperature and Moisture Conditioning of
Pultruded Fiber Reinforced Polymer (FRP) Composites Used
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in Structural Designs
This standard is issued under the fixed designation D7992/D7992M; 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 D6641/D6641M Test Method for Compressive Properties of
Polymer Matrix Composite Materials Using a Combined
1.1 Ingeneral,itisfeasiblethatthemechanicalpropertiesof
Loading Compression (CLC) Test Fixture
FRP composites will be affected by environmental conditions
D7290 Practice for Evaluating Material Property Character-
such as exposure to moisture at elevated temperatures. In order
istic Values for Polymeric Composites for Civil Engineer-
tomakereliablecomparisonsbetweendifferentmaterialsunder
ing Structural Applications
elevated temperature and moisture environmental conditions, it
D7745 Practice for Testing Pultruded Composites
is necessary to standardize the elevated temperature and
moisture conditions to which specimens of these materials are
3. Terminology
subjected prior to and during testing. This practice defines
3.1 Definitions:
procedures for elevated temperature and moisture conditioning
3.1.1 standard laboratory temperature, n—a temperature of
of pultruded FRP composites intended for use in structural
23 6 2°C (73.4 6 3.6°F)
design applications. The conditioning medium representing
3.1.2 standard laboratory atmosphere, n—an atmosphere
elevated temperature and moisture exposure described in this
having a temperature of 23 6 2°C (73.4 6 3.6°F) and a rela-
standard practice is distilled water maintained at 37.8 6 1.5°C
tive humidity of 50 6 10 %.
(100 6 3°F) for 1000 hours.
3.1.3 elevated temperature and moisture resistance, n—the
1.2 Units—The values stated in either SI units or inch-
ability of a thermoset pultruded composite to withstand el-
pound units are to be regarded separately as standard. The
evated temperature and moisture exposure at 37.8 6 1.5°C
values stated in each system may not be exact equivalents;
(100 6 3°F) for 1000 hours. This ability will be quantified in
therefore, each system shall be used independently of the other.
terms of the % retention of the mechanical property of interest
Combining values from the two systems may result in noncon-
as compared to samples held at standard laboratory atmo-
formance with the standard.
sphere.
1.3 This standard does not purport to address all of the
3.2 Terminology relating to pultruded composites is found
safety concerns, if any, associated with its use. It is the
in Terminology D3918.
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica-
4. Significance and Use
bility of regulatory limitations prior to use.
4.1 The elevated temperature and moisture conditioning
2. Referenced Documents procedures prescribed in this practice are designed to provide
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a standard procedure to be used to evaluate and compare the
2.1 ASTM Standards:
effect of elevated temperature and moisture conditioning under
D618 Practice for Conditioning Plastics for Testing
controlled laboratory conditions on pultruded FRP composites
D3918 Terminology Relating to Reinforced Plastic Pul-
to be used in structural design applications. The conditioning
truded Products
procedures prescribed in this practice are designed to obtain
reproducible results to compare and evaluate these materials
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This test method is under the jurisdiction ofASTM Committee D20 on Plastics
but are not intended to produce equilibrium conditions or
and is the direct responsibility of Subcommittee D20.18 on Reinforced Thermoset-
actual service conditions for these materials.
ting Plastics.
Current edition approved Sept. 1, 2015. Published October 2015. DOI: 10.1520/
5. Sampling
D7992_D7992M-15.
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For referenced ASTM standards, visit the ASTM website, www.astm.org, or
5.1 Sampling shall be in accordance with the locations from
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
which test specimens shall be taken from the reinforced
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. pultruded composites as defined in Practice D7745.
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