ASTM D8289-20
(Test Method)Standard Test Method for Tensile Strength Estimate by Disc Compression of Manufactured Graphite
Standard Test Method for Tensile Strength Estimate by Disc Compression of Manufactured Graphite
SIGNIFICANCE AND USE
4.1 By definition, the tensile strength of manufactured graphite is obtained by the direct uniaxial tensile test (Test Method C749). The C749 tensile test specimen is relatively large and is frequently incompatible with available irradiation capsule volumes, or oxidation apparatus (Test Method D7542). The splitting tensile test provides an alternate means of testing tensile properties on specimens that have severe geometric constraints and otherwise cannot meet the prescribed testing geometries of Test Method C749. By loading a disc-shaped specimen, on edge, under a compressive load, the resulting tensile stresses transverse to the loading axis provide an indication of the tensile strength properties of graphite. To obtain consistent and meaningful values of a splitting tensile strength, it is vital that the fracture initiate in the center of the disk and not along an edge. This standard test helps to ensure that the disk specimens break diametrally along the loading diameter due to tensile stresses that are perpendicular to the loading axis and that the fracture initiates at the center of the disk.
4.2 The stress determined using the diametral compression test is the maximum tensile stress at the center of the disk when loaded under the prescribed conditions and the fracture initiates at the center of the disk. It should be understood that this tensile stress value is obtained with the specimen in a complex biaxial stress condition. When the test is performed carefully and consistently these tensile stress values are comparable to each other, but the performers of this test should validate the values obtained. Any bias when comparing values with this standard to the uniaxial tensile stress values obtained using Test Method C749 should be identified and reported. Validation shall be performed on the same material and may not be applicable to other states of the same material (for example, oxidized, irradiated). Guidance on small specimen testing can be found in G...
SCOPE
1.1 This test method covers testing apparatus, specimen preparation, and testing procedures for determining the splitting tensile strength of graphite by diametral line compression of a disk. This small specimen geometry (Test Method D7779) is specifically intended for irradiation capsule use. Users are cautioned to use Test Method C749 if possible for measuring tensile strength properties of graphite.
1.2 The values stated in SI units are to be regarded as standard. The values given in parentheses after SI units are provided for information only and are not considered standard.
1.3 All dimension and force measurements and stress calculations shall conform to the guidelines for significant digits and rounding established in Practice D6026.
1.4 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.
1.5 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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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: D8289 − 20
Standard Test Method for
Tensile Strength Estimate by Disc Compression of
1
Manufactured Graphite
This standard is issued under the fixed designation D8289; 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* D6026 Practice for Using Significant Digits in Geotechnical
Data
1.1 This test method covers testing apparatus, specimen
D7542 Test Method forAir Oxidation of Carbon and Graph-
preparation, and testing procedures for determining the split-
ite in the Kinetic Regime
ting tensile strength of graphite by diametral line compression
D7775 Guide for Measurements on Small Graphite Speci-
of a disk. This small specimen geometry (Test Method D7779)
mens
is specifically intended for irradiation capsule use. Users are
D7779 Test Method for Determination of Fracture Tough-
cautioned to use Test Method C749 if possible for measuring
ness of Graphite at Ambient Temperature
tensile strength properties of graphite.
E4 Practices for Force Verification of Testing Machines
1.2 The values stated in SI units are to be regarded as
E177 Practice for Use of the Terms Precision and Bias in
standard. The values given in parentheses after SI units are
ASTM Test Methods
provided for information only and are not considered standard.
E691 Practice for Conducting an Interlaboratory Study to
1.3 All dimension and force measurements and stress cal-
Determine the Precision of a Test Method
culations shall conform to the guidelines for significant digits
and rounding established in Practice D6026.
3. Terminology
1.4 This standard does not purport to address all of the
3.1 Refer to Terminology D4175 for specific definitions.
safety concerns, if any, associated with its use. It is the
3.2 Definitions of Terms Specific to This Standard:
responsibility of the user of this standard to establish appro-
3.2.1 splitting tensile strength, n—the tensile strength of a
priate safety, health, and environmental practices and deter-
material estimated from a splitting compressive configuration
mine the applicability of regulatory limitations prior to use.
such as that described here.
1.5 This international standard was developed in accor-
dance with internationally recognized principles on standard-
ization established in the Decision on Principles for the 4. Significance and Use
Development of International Standards, Guides and Recom-
4.1 By definition, the tensile strength of manufactured
mendations issued by the World Trade Organization Technical
graphite is obtained by the direct uniaxial tensile test (Test
Barriers to Trade (TBT) Committee.
Method C749). The C749 tensile test specimen is relatively
large and is frequently incompatible with available irradiation
2. Referenced Documents
capsule volumes, or oxidation apparatus (Test Method D7542).
2
2.1 ASTM Standards:
The splitting tensile test provides an alternate means of testing
C749 Test Method for Tensile Stress-Strain of Carbon and
tensile properties on specimens that have severe geometric
Graphite
constraints and otherwise cannot meet the prescribed testing
D4175 Terminology Relating to Petroleum Products, Liquid
geometries of Test Method C749. By loading a disc-shaped
Fuels, and Lubricants
specimen, on edge, under a compressive load, the resulting
tensile stresses transverse to the loading axis provide an
1
This test method is under the jurisdiction of ASTM Committee D02 on
indication of the tensile strength properties of graphite. To
Petroleum Products, Liquid Fuels, and Lubricants and is the direct responsibility of
obtain consistent and meaningful values of a splitting tensile
Subcommittee D02.F0 on Manufactured Carbon and Graphite Products.
strength, it is vital that the fracture initiate in the center of the
Current edition approved May 1, 2020. Published June 2020. Originally
disk and not along an edge. This standard test helps to ensure
approved in 2019. Last previous edition approved in 2019 as D8289 – 19. DOI:
10.1520/D8289-20.
that the disk specimens break diametrally along the loading
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
diameter due to tensile stresses that are perpendicular to the
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
loading axis and that the fracture initiates at the center of the
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. disk.
*A Summary of Changes section appears
...
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: D8289 − 19 D8289 − 20 An American National Standard
Standard Test Method for
Tensile Strength Estimate by Disc Compression of
1
Manufactured Graphite
This standard is issued under the fixed designation D8289; 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 testing apparatus, specimen preparation, and testing procedures for determining the splitting tensile
strength of graphite by diametral line compression of a disk. This small specimen geometry (Test Method D7779) is specifically
intended for irradiation capsule use. Users are cautioned to use Test Method C749 if possible for measuring tensile strength
properties of graphite.
1.2 The values stated in SI units are to be regarded as standard. The values given in parentheses after SI units are provided for
information only and are not considered standard.
1.3 All dimension and force measurements and stress calculations shall conform to the guidelines for significant digits and
rounding established in Practice D6026.
1.4 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.
1.5 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:
C749 Test Method for Tensile Stress-Strain of Carbon and Graphite
D4175 Terminology Relating to Petroleum Products, Liquid Fuels, and Lubricants
D6026 Practice for Using Significant Digits in Geotechnical Data
D7542 Test Method for Air Oxidation of Carbon and Graphite in the Kinetic Regime
D7775 Guide for Measurements on Small Graphite Specimens
D7779 Test Method for Determination of Fracture Toughness of Graphite at Ambient Temperature
E4 Practices for Force Verification of Testing Machines
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. Terminology
3.1 Refer to Terminology D4175 for specific definitions.
3.2 Definitions of Terms Specific to This Standard:
3.2.1 splitting tensile strength, n—the tensile strength of a material estimated from a splitting compressive configuration such
as that described here.
4. Significance and Use
4.1 By definition, the tensile strength of manufactured graphite is obtained by the direct uniaxial tensile test (Test Method
C749). The C749 tensile test specimen is relatively large and is frequently incompatible with available irradiation capsule volumes,
1
This test method is under the jurisdiction of ASTM Committee D02 on Petroleum Products, Liquid Fuels, and Lubricants and is the direct responsibility of Subcommittee
D02.F0 on Manufactured Carbon and Graphite Products.
Current edition approved Nov. 1, 2019May 1, 2020. Published November 2019June 2020. Originally approved in 2019. Last previous edition approved in 2019 as
D8289 – 19. DOI: 10.1520/D8289-19.10.1520/D8289-20.
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.
*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
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D8289 − 20
or oxidation apparatus (Test Method D7542). The splitting tensile test provides an alternate means of testing tensile properties on
specimens that have severe geometric constraints and otherwise cannot meet the prescribed testing geometries of Test Method
C749. By loading a disc-shaped specimen, on edge, under a compressive load, the resulting tensile stresses transverse to the
loading axis provide an indication of the tensile strength properties
...
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