ASTM D7615/D7615M-23

Standard Practice for Open-Hole Fatigue Response of Polymer Matrix Composite Laminates

SIGNIFICANCE AND USE
5.1 Refer to Guide D8509.
SCOPE
1.1 This practice provides instructions for modifying static open-hole tensile and compressive strength test methods to determine the fatigue behavior of composite materials subjected to cyclic tensile or compressive forces, or both. The composite material forms are limited to continuous-fiber reinforced polymer matrix composites in which the laminate is both symmetric and balanced with respect to the test direction. The range of acceptable test laminates and thicknesses are described in 8.2.  
1.2 This practice supplements Test Methods D5766/D5766M and D6484/D6484M with provisions for testing specimens under cyclic loading. Several important test specimen parameters, for example fatigue force (stress) ratio, are not mandated by this practice; however, repeatable results require that these parameters be specified and reported.  
1.3 This practice is limited to test specimens subjected to constant amplitude uniaxial loading, where the machine is controlled so that the test specimen is subjected to repetitive constant amplitude force (stress) cycles. Either engineering stress or applied force may be used as a constant amplitude fatigue variable. The repetitive loadings may be tensile, compressive, or reversed, depending upon the test specimen and procedure utilized.  
1.4 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.  
1.4.1 Within the text the inch-pound units are shown in brackets.  
1.5 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.  
1.6 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: Published
• Publication Date: 31-Aug-2023
• ICS: 83.120 - Reinforced plastics
• Technical Committee: D30 - Composite Materials
• Drafting Committee: D30.05 - Structural Test Methods

Relations

• Replaces: ASTM D7615/D7615M-19 - Standard Practice for Open-Hole Fatigue Response of Polymer Matrix Composite Laminates
• Effective Date: 01-Sep-2023
• Refers: ASTM D6484/D6484M-20 - Standard Test Method for Open-Hole Compressive Strength of Polymer Matrix Composite Laminates
• Effective Date: 01-Oct-2020
• Referred By: ASTM D8509/D8509M-23 - Standard Guide for Test Method Selection and Test Specimen Design for Bolted Joint Related Properties
• Effective Date: 01-Sep-2023
• Referred By: ASTM D4762-23 - Standard Guide for Testing Polymer Matrix Composite Materials
• Effective Date: 01-Sep-2023
• Referred By: ASTM D6484/D6484M-23 - Standard Test Method for Open-Hole Compressive Strength of Polymer Matrix Composite Laminates
• Effective Date: 01-Sep-2023

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: D7615/D7615M − 23
Standard Practice for
Open-Hole Fatigue Response of Polymer Matrix Composite
1
Laminates
This standard is issued under the fixed designation D7615/D7615M; 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 priate safety, health, and environmental practices and deter-
mine the applicability of regulatory limitations prior to use.
1.1 This practice provides instructions for modifying static
1.6 This international standard was developed in accor-
open-hole tensile and compressive strength test methods to
dance with internationally recognized principles on standard-
determine the fatigue behavior of composite materials sub-
ization established in the Decision on Principles for the
jected to cyclic tensile or compressive forces, or both. The
Development of International Standards, Guides and Recom-
composite material forms are limited to continuous-fiber rein-
mendations issued by the World Trade Organization Technical
forced polymer matrix composites in which the laminate is
Barriers to Trade (TBT) Committee.
both symmetric and balanced with respect to the test direction.
The range of acceptable test laminates and thicknesses are
2. Referenced Documents
described in 8.2.
2
2.1 ASTM Standards:
1.2 This practice supplements Test Methods D5766/
D883 Terminology Relating to Plastics
D5766M and D6484/D6484M with provisions for testing
D3878 Terminology for Composite Materials
specimens under cyclic loading. Several important test speci-
D5229/D5229M Test Method for Moisture Absorption Prop-
men parameters, for example fatigue force (stress) ratio, are not
erties and Equilibrium Conditioning of Polymer Matrix
mandated by this practice; however, repeatable results require
Composite Materials
that these parameters be specified and reported.
D5766/D5766M Test Method for Open-Hole Tensile
1.3 This practice is limited to test specimens subjected to Strength of Polymer Matrix Composite Laminates
constant amplitude uniaxial loading, where the machine is
D6484/D6484M Test Method for Open-Hole Compressive
controlled so that the test specimen is subjected to repetitive Strength of Polymer Matrix Composite Laminates
constant amplitude force (stress) cycles. Either engineering
D8509 Guide for Test Method Selection and Test Specimen
stress or applied force may be used as a constant amplitude
Design for Bolted Joint Related Properties
fatigue variable. The repetitive loadings may be tensile, E4 Practices for Force Calibration and Verification of Test-
compressive, or reversed, depending upon the test specimen
ing Machines
and procedure utilized. E6 Terminology Relating to Methods of Mechanical Testing
E83 Practice for Verification and Classification of Exten-
1.4 The values stated in either SI units or inch-pound units
someter Systems
are to be regarded separately as standard. The values stated in
E122 Practice for Calculating Sample Size to Estimate, With
each system are not necessarily exact equivalents; therefore, to
Specified Precision, the Average for a Characteristic of a
ensure conformance with the standard, each system shall be
Lot or Process
used independently of the other, and values from the two
E177 Practice for Use of the Terms Precision and Bias in
systems shall not be combined.
ASTM Test Methods
1.4.1 Within the text the inch-pound units are shown in
E456 Terminology Relating to Quality and Statistics
brackets.
E467 Practice for Verification of Constant Amplitude Dy-
1.5 This standard does not purport to address all of the
namic Forces in an Axial Fatigue Testing System
safety concerns, if any, associated with its use. It is the
E739 Guide for Statistical Analysis of Linear or Linearized
responsibility of the user of this standard to establish appro-
Stress-Life (S-N) and Strain-Life (ε-N) Fatigue Data
E1823 Terminology Relating to Fatigue and Fracture Testing
1
This practice is under the jurisdiction of ASTM Committee D30 on Composite
Materials and is the direct responsibility of Subcommittee D30.05 on Structural Test
2
Methods. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved Sept. 1, 2023. Published September 2023. Originally contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
approved in 2011. Last previous edition approved in 2019 as D7615/D7615M – 19. Standards volume information, refer to the standard’s Document Summary page on
DOI: 10.1520/D7615_
...

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: D7615/D7615M − 19 D7615/D7615M − 23
Standard Practice for
Open-Hole Fatigue Response of Polymer Matrix Composite
1
Laminates
This standard is issued under the fixed designation D7615/D7615M; 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 practice provides instructions for modifying static open-hole tensile and compressive strength test methods to determine
the fatigue behavior of composite materials subjected to cyclic tensile or compressive forces, or both. The composite material
forms are limited to continuous-fiber reinforced polymer matrix composites in which the laminate is both symmetric and balanced
with respect to the test direction. The range of acceptable test laminates and thicknesses are described in 8.2.
1.2 This practice supplements Test Methods D5766/D5766M and D6484/D6484M with provisions for testing specimens under
cyclic loading. Several important test specimen parameters, for example fatigue force (stress) ratio, are not mandated by this
practice; however, repeatable results require that these parameters be specified and reported.
1.3 This practice is limited to test specimens subjected to constant amplitude uniaxial loading, where the machine is controlled
so that the test specimen is subjected to repetitive constant amplitude force (stress) cycles. Either engineering stress or applied force
may be used as a constant amplitude fatigue variable. The repetitive loadings may be tensile, compressive, or reversed, depending
upon the test specimen and procedure utilized.
1.4 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.
1.4.1 Within the text the inch-pound units are shown in brackets.
1.5 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.
1.6 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:
1
This practice is under the jurisdiction of ASTM Committee D30 on Composite Materials and is the direct responsibility of Subcommittee D30.05 on Structural Test
Methods.
Current edition approved April 1, 2019Sept. 1, 2023. Published May 2019September 2023. Originally approved in 2011. Last previous edition approved in 20182019 as
D7615/D7615M–11(2018).D7615/D7615M – 19. DOI: 10.1520/D7615_D7615M-19.10.1520/D7615_D7615M-23.
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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D7615/D7615M − 23
D883 Terminology Relating to Plastics
D3878 Terminology for Composite Materials
D5229/D5229M Test Method for Moisture Absorption Properties and Equilibrium Conditioning of Polymer Matrix Composite
Materials
D5766/D5766M Test Method for Open-Hole Tensile Strength of Polymer Matrix Composite Laminates
D6484/D6484M Test Method for Open-Hole Compressive Strength of Polymer Matrix Composite Laminates
D8509 Guide for Test Method Selection and Test Specimen Design for Bolted Joint Related Properties
E4 Practices for Force Calibration and Verification of Testing Machines
E6 Terminology Relating to Methods of Mechanical Testing
E83 Practice for Verification and Classification of Extensometer Systems
E122 Practice for Calculating Sample Size to Estimate, With Specified Precision, the Average for a Characteristic of a Lot or
...