ASTM D6588/D6588M-10a
(Test Method)Standard Test Method for Fatigue of Tire Cords (Disc Fatigue Test)
Standard Test Method for Fatigue of Tire Cords (Disc Fatigue Test)
SIGNIFICANCE AND USE
This test method is not recommended for acceptance testing of commercial shipments in the absence of reliable information on between-laboratory precision.
If there are differences of practical significance between the reported test results for two laboratories (or more), a comparative test should be performed to determine if there is a statistical bias between them, using competent statistical assistance. As a minimum, test samples should be used that are as homogeneous as possible, that are drawn from a material from which the disparate test results were obtained, and that are randomly assigned in equal numbers to each laboratory for testing. Other fabrics with established test values may be used for this purpose. The test results from the two laboratories should be compared using a statistical test for unpaired data, at a probability level chosen prior to the testing series. If a bias is found, either its cause must be found and corrected, or future test results must be adjusted in consideration of the known bias.
SCOPE
1.1 This test method covers the determination of fatigue of tire cords in rubber due to compression or extension, or both, using a disc fatigue tester. The fatigue is measured as a loss in strength.
1.2 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 non-conformance 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 to determine the applicability of regulatory limitations prior to use.
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Designation:D6588/D6588M–10a
Standard Test Method for
1
Fatigue of Tire Cords (Disc Fatigue Test)
This standard is issued under the fixed designation D6588/D6588M; 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 3.1.1 For definitions of terms relating to tire cord and
fabrics, see Terminology D6477.
1.1 This test method covers the determination of fatigue of
3.1.2 For definitions of other terms related to textiles, see
tire cords in rubber due to compression or extension, or both,
Terminology D123.
using a disc fatigue tester. The fatigue is measured as a loss in
strength.
4. Summary of Test Method
1.2 The values stated in either SI units or inch-pound units
4.1 disc fatigue is a measure of the strength loss of a tire
are to be regarded separately as standard. The values stated in
cord, which is subjected to repeated stresses. The stresses are
each system may not be exact equivalents; therefore, each
accomplished by subjecting the tire cords, after being cured in
system shall be used independently of the other. Combining
rubber, to repeated cycles of compression and extension.
values from the two systems may result in non-conformance
4.2 The specimen of interest is the cord after it has been
with the standard.
stressed and later removed from the rubber in which it was
1.3 This standard does not purport to address all of the
imbedded. Cord specimens are placed between strips of rubber
safety concerns, if any, associated with its use. It is the
compound and molded into blocks.The specimen block is then
responsibility of the user of this standard to establish appro-
mounted between two rotating discs that are positioned in such
priatesafetyandhealthpracticestodeterminetheapplicability
a way that the specimen will undergo compression or exten-
of regulatory limitations prior to use.
sion, or both, as the discs rotate. After a specified number of
2. Referenced Documents cycles, the cords are removed from the blocks and their
2
breaking force measured on a tensile testing machine. The
2.1 ASTM Standards:
fatigue, based on the unfatigued specimen strength, is ex-
D76 Specification for Tensile Testing Machines for Textiles
pressed as a percent strength loss in fatigued specimens.
D123 Terminology Relating to Textiles
D885 Test Methods for Tire Cords, Tire Cord Fabrics, and
5. Significance and Use
Industrial Filament Yarns Made from Manufactured
5.1 This test method is not recommended for acceptance
Organic-Base Fibers
testing of commercial shipments in the absence of reliable
D1776 Practice for Conditioning and Testing Textiles
information on between-laboratory precision.
D6477 Terminology Relating to Tire Cord, Bead Wire,
5.1.1 If there are differences of practical significance be-
Hose Reinforcing Wire, and Fabrics
tween the reported test results for two laboratories (or more), a
D7269 Test Methods for Tensile Testing of Aramid Yarns
comparative test should be performed to determine if there is a
3. Terminology statistical bias between them, using competent statistical assis-
tance. As a minimum, test samples should be used that are as
3.1 Definitions:
homogeneous as possible, that are drawn from a material from
which the disparate test results were obtained, and that are
1
This test method is under the jurisdiction ofASTM Committee D13 onTextiles
randomly assigned in equal numbers to each laboratory for
and is the direct responsibility of Subcommittee D13.19 on Industrial Fibers and
testing. Other fabrics with established test values may be used
Metallic Reinforcements
for this purpose. The test results from the two laboratories
Current edition approved June 1, 2010. Published August 2010. Originally
should be compared using a statistical test for unpaired data, at
approved in 2000. Last previous edition approved in 2002 as D6588–02. DOI:
10.1520/D6588_D6588M-10A.
a probability level chosen prior to the testing series. If a bias is
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
found, either its cause must be found and corrected, or future
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
test results must be adjusted in consideration of the known
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. bias.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1
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D6588/D6588M–10a
6. Apparatus, Materials, and Reagents 6.12 Tachometer or Stroboscope.
6.13 Screwdriver, or other tightening devic
...
This document is not anASTM standard and is intended only to provide the user of anASTM 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:D6588–02 Designation:D6588/D6588M–10a
Standard Test Method for
1
Fatigue of Tire Cords (Disc Fatigue Test)
This standard is issued under the fixed designation D6588/D6588M; 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
1.1 This test method covers the determination of fatigue of tire cords in rubber due to compression or extension, or both, using
a disc fatigue tester. The fatigue is measured as a loss in strength.
1.2The values stated in either SI units or other units (in parentheses) are to be regarded separately as standard.The values stated
in each system are not exact equivalents; therefore, each system shall be used independently of the other.
1.2 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 non-conformance 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 to determine the applicability of regulatory
limitations prior to use.
2. Referenced Documents
2
2.1 ASTM Standards:
D76 Specification for Tensile Testing Machines for Textiles
D123 Terminology Relating to Textiles
D885 Test Methods for Tire Cords, Tire Cord Fabrics, and Industrial Filament Yarns Made from Manufactured Organic-Base
Fibers
D1776 Practice for Conditioning and Testing Textiles
D6477 Terminology Relating toTire Cord, BeadWire, Hose ReinforcingWire, and FabricsTerminology Relating toTire Cord,
Bead Wire, Hose Reinforcing Wire, and Fabrics
D7269 Test Methods for Tensile Testing of Aramid Yarns
3. Terminology
3.1 Definitions:
3.1.1 For definitions of terms relating to tire cord and fabrics, see Terminology D6477.
3.1.2 For definitions of other terms related to textiles, see Terminology D123.
4. Summary of Test Method
4.1 disc fatigue is a measure of the strength loss of a tire cord, which is subjected to repeated stresses. The stresses are
accomplished by subjecting the tire cords, after being cured in rubber, to repeated cycles of compression and extension.
4.2 The specimen of interest is the cord after it has been stressed and later removed from the rubber in which it was imbedded.
Cord specimens are placed between strips of rubber compound and molded into blocks. The specimen block is then mounted
between two rotating discs that are positioned in such a way that the specimen will undergo compression or extension, or both,
as the discs rotate. After a specified number of cycles, the cords are removed from the blocks and their breaking force measured
on a tensile testing machine. The fatigue, based on the unfatigued specimen strength, is expressed as a percent strength loss in
fatigued specimens.
1
This test method is under the jurisdiction of ASTM Committee D13 on Textiles and is the direct responsibility of Subcommittee D13.19 on Tire Cord and Fabrics
Current edition approvedApril 10, 2002. Published June 2002. Originally published as D6588–00. Last previous edition D6588–00. DOI: 10.1520/D6588-02.on Industrial
Fibers and Metallic Reinforcements
Current edition approved June 1, 2010. Published August 2010. Originally approved in 2000. Last previous edition approved in 2002 as D6588–02. DOI:
10.1520/D6588_D6588M-10A.
2
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM 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.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1
---------------------- Page: 1 ----------------------
D6588/D6588M–10a
5. Significance and Use
5.1 This test method is not recommended for acceptance testing of commercial shipments in the absence of reliable information
on between-laboratory precision.
5.1.1 If there are differences of practical significance between the reported test results for two laboratories (or more), a
comparativetestshouldbeperformedtodetermineifthereisastatisticalbiasbetweenthem,usingc
...
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