ASTM D3479/D3479M-19

Standard Test Method for Tension-Tension Fatigue of Polymer Matrix Composite Materials

SIGNIFICANCE AND USE
5.1 This test method is designed to yield tensile fatigue data for material specifications, research and development, quality assurance, and structural design and analysis. The primary test result is the fatigue life of the test specimen under a specific loading and environmental condition. Replicate tests may be used to obtain a distribution of fatigue life for specific material types, laminate stacking sequences, environments, and loading conditions. Guidance in statistical analysis of fatigue life data, such as determination of linearized stress life (S-N) or strain-life (ε-N) curves, can be found in Practice E739.  
5.2 This test method can be utilized in the study of fatigue damage in a polymer matrix composite such as the occurrence of microscopic cracks, fiber fractures, or delaminations.3 The specimen's residual strength or stiffness, or both, may change due to these damage mechanisms. The loss in stiffness may be quantified by discontinuing cyclic loading at selected cycle intervals to obtain the quasi-static axial stress-strain curve using modulus determination procedures found in Test Method D3039/D3039M. The loss in strength associated with fatigue damage may be determined by discontinuing cyclic loading to obtain the static strength using Test Method D3039/D3039M.  
Note 1: This test method may be used as a guide to conduct tension-tension variable amplitude loading. This information can be useful in the understanding of fatigue behavior of composite structures under spectrum loading conditions, but is not covered in this test method.
SCOPE
1.1 This test method determines the fatigue behavior of polymer matrix composite materials subjected to tensile cyclic loading. The composite material forms are limited to continuous-fiber or discontinuous-fiber reinforced composites for which the elastic properties are specially orthotropic with respect to the test direction. This test method is limited to unnotched test specimens subjected to constant amplitude uniaxial in-plane loading where the loading is defined in terms of a test control parameter.  
1.2 This test method presents two procedures where each defines a different test control parameter.  
1.2.1 Procedure A—A system in which the test control parameter is the load (stress) and the machine is controlled so that the test specimen is subjected to repetitive constant amplitude load cycles. In this procedure, the test control parameter may be described using either engineering stress or applied load as a constant amplitude fatigue variable.  
1.2.2 Procedure B—A system in which the test control parameter is the strain in the loading direction and the machine is controlled so that the test specimen is subjected to repetitive constant amplitude strain cycles. In this procedure, the test control parameter may be described using engineering strain in the loading direction as a constant amplitude fatigue variable.  
1.3 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system are not necessarily exact equivalents; therefore, to ensure conformance with the standard, each system shall be used independently of the other, and values from the two systems shall not be combined.  
1.3.1 Within the text the inch-pound units are shown in brackets.  
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.

General Information

• Status: Historical
• Publication Date: 31-Mar-2019
• ICS: 83.140.20 - Laminated sheets
• Technical Committee: D30 - Composite Materials
• Drafting Committee: D30.04 - Lamina and Laminate Test Methods

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: D3479/D3479M − 19
Standard Test Method for
Tension-Tension Fatigue of Polymer Matrix Composite
1
Materials
This standard is issued under the fixed designation D3479/D3479M; 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.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope responsibility of the user of this standard to establish appro-
priate safety, health, and environmental practices and deter-
1.1 This test method determines the fatigue behavior of
mine the applicability of regulatory limitations prior to use.
polymer matrix composite materials subjected to tensile cyclic
1.5 This international standard was developed in accor-
loading. The composite material forms are limited to
dance with internationally recognized principles on standard-
continuous-fiber or discontinuous-fiber reinforced composites
ization established in the Decision on Principles for the
for which the elastic properties are specially orthotropic with
Development of International Standards, Guides and Recom-
respect to the test direction. This test method is limited to
mendations issued by the World Trade Organization Technical
unnotched test specimens subjected to constant amplitude
Barriers to Trade (TBT) Committee.
uniaxial in-plane loading where the loading is defined in terms
of a test control parameter.
2. Referenced Documents
1.2 This test method presents two procedures where each
2
2.1 ASTM Standards:
defines a different test control parameter.
D883 Terminology Relating to Plastics
1.2.1 Procedure A—A system in which the test control
D3039/D3039M Test Method for Tensile Properties of Poly-
parameter is the load (stress) and the machine is controlled so
mer Matrix Composite Materials
that the test specimen is subjected to repetitive constant
D3878 Terminology for Composite Materials
amplitude load cycles. In this procedure, the test control
D5229/D5229M Test Method for Moisture Absorption Prop-
parameter may be described using either engineering stress or
erties and Equilibrium Conditioning of Polymer Matrix
applied load as a constant amplitude fatigue variable.
Composite Materials
1.2.2 Procedure B—A system in which the test control
E4 Practices for Force Verification of Testing Machines
parameter is the strain in the loading direction and the machine
E6 Terminology Relating to Methods of Mechanical Testing
is controlled so that the test specimen is subjected to repetitive
E83 Practice for Verification and Classification of Exten-
constant amplitude strain cycles. In this procedure, the test
someter Systems
control parameter may be described using engineering strain in
E122 Practice for Calculating Sample Size to Estimate, With
the loading direction as a constant amplitude fatigue variable.
Specified Precision, the Average for a Characteristic of a
1.3 The values stated in either SI units or inch-pound units
Lot or Process
are to be regarded separately as standard. The values stated in
E177 Practice for Use of the Terms Precision and Bias in
each system are not necessarily exact equivalents; therefore, to
ASTM Test Methods
ensure conformance with the standard, each system shall be
E456 Terminology Relating to Quality and Statistics
used independently of the other, and values from the two
E467 Practice for Verification of Constant Amplitude Dy-
systems shall not be combined.
namic Forces in an Axial Fatigue Testing System
1.3.1 Within the text the inch-pound units are shown in
E739 Practice for Statistical Analysis of Linear or Linearized
brackets.
Stress-Life (S-N) and Strain-Life (ε-N) Fatigue Data
E1012 Practice for Verification of Testing Frame and Speci-
1.4 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the men Alignment Under Tensile and Compressive Axial
Force Application
1
This test method is under the jurisdiction of ASTM Committee D30 on
Composite Materials and is the direct responsibility of Subcommittee D30.04 on
2
Lamina and Laminate Test Methods. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved April 1, 2019. Published May 2019. Originally contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
approved in 1976. Last previous edition approved in 2012 as D3479/D3479M – 12. Standards volume information, refer to the standard’s Document Summary page on
DOI: 10.1520/D3479_D3479M-19. the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

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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: D3479/D3479M − 12 D3479/D3479M − 19
Standard Test Method for
Tension-Tension Fatigue of Polymer Matrix Composite
1
Materials
This standard is issued under the fixed designation D3479/D3479M; 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.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope
1.1 This test method determines the fatigue behavior of polymer matrix composite materials subjected to tensile cyclic loading.
The composite material forms are limited to continuous-fiber or discontinuous-fiber reinforced composites for which the elastic
properties are specially orthotropic with respect to the test direction. This test method is limited to unnotched test specimens
subjected to constant amplitude uniaxial in-plane loading where the loading is defined in terms of a test control parameter.
1.2 This test method presents two procedures where each defines a different test control parameter.
1.2.1 Procedure A—A system in which the test control parameter is the load (stress) and the machine is controlled so that the
test specimen is subjected to repetitive constant amplitude load cycles. In this procedure, the test control parameter may be
described using either engineering stress or applied load as a constant amplitude fatigue variable.
1.2.2 Procedure B—A system in which the test control parameter is the strain in the loading direction and the machine is
controlled so that the test specimen is subjected to repetitive constant amplitude strain cycles. In this procedure, the test control
parameter may be described using engineering strain in the loading direction as a constant amplitude fatigue variable.
1.3 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each
system mayare not benecessarily exact equivalents; therefore, to ensure conformance with the standard, each system shall be used
independently of the other. Combiningother, and values from the two systems may result in non-conformance with the
standard.shall not be combined.
1.3.1 Within the text the inch-pound units are shown in brackets.
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 safety, health, and healthenvironmental 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:
D883 Terminology Relating to Plastics
D3039/D3039M Test Method for Tensile Properties of Polymer Matrix Composite Materials
D3878 Terminology for Composite Materials
D5229/D5229M Test Method for Moisture Absorption Properties and Equilibrium Conditioning of Polymer Matrix Composite
Materials
E4 Practices for Force Verification of Testing Machines
E6 Terminology Relating to Methods of Mechanical Testing
E83 Practice for Verification and Classification of Extensometer Systems
1
This test method is under the jurisdiction of ASTM Committee D30 on Composite Materials and is the direct responsibility of Subcommittee D30.04 on Lamina and
Laminate Test Methods.
Current edition approved Aug. 1, 2012April 1, 2019. Published January 2013May 2019. Originally approved in 1976. Last previous edition approved in 20072012 as
D3479/D3479M – 96 (2007).D3479/D3479M – 12. DOI: 10.1520/D3479_D3479M-12.10.1520/D3479_D3479M-19.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. 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

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D3479/D3479M − 19
E122 Practice for Calculating Sample Size to Estimate, With Specified Precision, the Average for a Characteristic
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