ASTM D7615/D7615M-19
Standard Practice for Open-Hole Fatigue Response of Polymer Matrix Composite Laminates

Standard No.

ASTM D7615/D7615M-19

Release Date

2019

Published By

American Society for Testing and Materials (ASTM)

Status

Be replaced

Replace By

ASTM D7615/D7615M-23

Latest

ASTM D7615/D7615M-23

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.

ASTM D7615/D7615M-19 Referenced Document

• ASTM D3878 Standard Terminology Composite Materials
• ASTM D5229/D5229M Standard Test Method for Moisture Absorption Properties and Equilibrium Conditioning of Polymer Matrix Composite Materials
• ASTM D5766/D5766M Standard Test Method for Open Hole Tensile Strength of Polymer Matrix Composite Laminates
• ASTM D6484/D6484M Standard Test Method for Open-Hole Compressive Strength of Polymer Matrix Composite Laminates
• ASTM D883 Standard Terminology Relating to Plastics*， 2024-02-01 Update
• ASTM E122 Standard Practice for Calculating Sample Size to Estimate, With a Specified Tolerable Error, the Average for Characteristic of a Lot or Process
• ASTM E177 Standard Practice for Use of the Terms Precision and Bias in ASTM Test Methods
• ASTM E1823 Standard Terminology Relating to Fatigue and Fracture Testing
• ASTM E4 Standard Practices for Force Verification of Testing Machines
• ASTM E456 Standard Terminology for Relating to Quality and Statistics
• ASTM E467 Standard Practice for Verification of Constant Amplitude Dynamic Forces in an Axial Fatigue Testing System
• ASTM E6 Standard Terminology Relating to Methods of Mechanical Testing
• ASTM E739 Standard Practice for Statistical Analysis of Linear or Linearized Stress-Life (S-N) and Strain-Life (949;-N) Fatigue Data
• ASTM E83 Standard Practice for Verification and Classification of Extensometer

ASTM D7615/D7615M-19 history

• 2023 ASTM D7615/D7615M-23 Standard Practice for Open-Hole Fatigue Response of Polymer Matrix Composite Laminates
• 2019 ASTM D7615/D7615M-19 Standard Practice for Open-Hole Fatigue Response of Polymer Matrix Composite Laminates
• 2018 ASTM D7615/D7615M-11(2018) Standard Practice for Open-Hole Fatigue Response of Polymer Matrix Composite Laminates
• 2011 ASTM D7615/D7615M-11 Standard Practice for Open-Hole Fatigue Response of Polymer Matrix Composite Laminates