ASTM D6588-00
(Test Method)Standard Test Method for Fatigue of Tire Cords
Standard Test Method for Fatigue of Tire Cords
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 disk fatigue tester. The fatigue is measured as a loss in strength.
1.2 The 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.
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.
General Information
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Standards Content (Sample)
Designation: D 6588 – 00
Standard Test Method for
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Fatigue of Tire Cords
This standard is issued under the fixed designation D 6588; 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.
1. Scope already is, modified to a state in which it is essentially
insoluble (but can swell) in boiling solvent, such as benzene,
1.1 This test method covers the determination of fatigue of
methyl ethyl ketone, and ethanol-toluene azeotrope.
tire cords in rubber due to compression or extension, or both,
3.1.7 rubber compound, n—as used in the manufacture of
using a disk fatigue tester. The fatigue is measured as a loss in
rubber articles, an intimate mixture of elastomer(s) with all the
strength.
materials necessary for the finished article.
1.2 The values stated in either SI units or other units (in
3.1.8 standard atmosphere for testing textiles,
parentheses) are to be regarded separately as standard. The
n—laboratory conditions for testing fibers, yarns, and fabrics in
values stated in each system are not exact equivalents; there-
which air temperature and relative humidity are maintained at
fore, each system shall be used independently of the other.
specific levels with established tolerances.
1.3 This standard does not purport to address all of the
3.1.8.1 Discussion—Textile materials are used in a number
safety concerns, if any, associated with its use. It is the
of specific end-use applications that frequently require different
responsibility of the user of this standard to establish appro-
testing temperatures and relative humidities. Specific condi-
priate safety and health practices to determine the applicability
tioning and testing of textiles for end product requirements can
of regulatory limitations prior to use.
be carried out in accordance with Table 1 in Practice D 1776.
2. Referenced Documents
3.1.9 tabby, n—a plain weave fabric. In the context of tire
cord fabric, it refers to sections of closely spaced weft yarns in
2.1 ASTM Standards:
a special section of fabric woven to provide a sample.
D 76 Specification for Tensile Testing Machines for Tex-
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3.1.9.1 Discussion—A tabby usually is woven 150 to 200
tiles
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mm (6 to 8 in.) in length with usually a cotton filling yarn in the
D 123 Terminology Relating to Textiles
range from 750 to 2000 dtex (675 to 1800 denier) and 30 to 50
D 885 Methods of Testing Tire Cords, Tire Cord Fabrics,
picks/dm (8 to 12 picks/in.).
and Industrial Filament Yarns Made from Man-Made
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3.1.10 tabby sample, n—the section of tire cord fabric
Organic-Base Fibers
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between two tabbies that have been woven separately with a
D 1776 Practice for Conditioning Textiles for Testing
distance of 0.5 to 1.0 m (18 to 16 in.) between them.
3. Terminology
3.1.11 tire cord fabric, n—a fabric consisting of tire cord
warp with widely spaced (usually 40 to 200 picks/m (1 to 5
3.1 Definitions:
picks/in.)) single yarn filling.
3.1.1 breaking force, n—the maximum force applied to a
3.1.12 For definitions of other terms related to textiles, see
material carried to rupture.
Terminology D 123.
3.1.2 cord, n—a twisted or formed structure composed of
one or more single or plied filaments, strands, or yarns of
4. Summary of Test Method
organic polymer or inorganic materials.
4.1 Disk fatigue is a measure of the strength loss of a tire
3.1.3 elongation, n—the ratio of the extension of a material
cord, which is subjected to repeated stresses. The stresses are
to the length of the material prior to stretching.
accomplished by subjecting the tire cords, after being cured in
3.1.4 extension, n—the change in length of a material due to
rubber, to repeated cycles of compression and extension.
stretching.
4.2 The specimen of interest is the cord after it has been
3.1.5 fabric, n—in textiles, a planar structure consisting of
stressed and later removed from the rubber in which it was
yarns or fibers.
imbedded. Cord specimens are placed between strips of rubber
3.1.6 rubber, n—a material that is capable of recovering
compound and molded into blocks. The specimen block is then
from large deformations quickly and forcibly, and can be, or
mounted between two rotating disks that are positioned in such
a way that the specimen will undergo compression or exten-
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This test method is under the jurisdiction of ASTM Committee D13 on Textiles
sion, or both, as the disks rotate. After a specified number of
and is the direct responsibility of Subcommittee D13.19 on Tire Cord and Fabrics
cycles, the cords are removed from the blocks and their
Current edition approved Sept. 10, 2000. Published November 2000.
2 breaking force measured on a tensile testing machine. The
Annual Book of ASTM Standards, Vol 07.01.
Copyright © ASTM, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959, United States.
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