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    ASTM E2207 - 15(2021)

    Standard Practice for Strain-Controlled Axial-Torsional Fatigue Testing with Thin-Walled Tubular Specimens

    Active Standard ASTM E2207 | Developed by Subcommittee: E08.05

    Book of Standards Volume: 03.01

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    Significance and Use

    4.1 Multiaxial forces often tend to introduce deformation and damage mechanisms that are unique and quite different from those induced under a simple uniaxial loading condition. Since most engineering components are subjected to cyclic multiaxial forces it is necessary to characterize the deformation and fatigue behaviors of materials in this mode. Such a characterization enables reliable prediction of the fatigue lives of many engineering components. Axial-torsional loading is one of several possible types of multiaxial force systems and is essentially a biaxial type of loading. Thin-walled tubular specimens subjected to axial-torsional loading can be used to explore behavior of materials in two of the four quadrants in principal stress or strain spaces. Axial-torsional loading is more convenient than in-plane biaxial loading because the stress state in the thin-walled tubular specimens is constant over the entire test section and is well-known. This practice is useful for generating fatigue life and cyclic deformation data on homogeneous materials under axial, torsional, and combined in- and out-of-phase axial-torsional loading conditions.

    1. Scope

    1.1 The standard deals with strain-controlled, axial, torsional, and combined in- and out-of-phase axial torsional fatigue testing with thin-walled, circular cross-section, tubular specimens at isothermal, ambient and elevated temperatures. This standard is limited to symmetric, completely-reversed strains (zero mean strains) and axial and torsional waveforms with the same frequency in combined axial-torsional fatigue testing. This standard is also limited to characterization of homogeneous materials with thin-walled tubular specimens and does not cover testing of either large-scale components or structural elements.

    1.2 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.

    1.3 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 (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

    ASTM Standards

    E3 Guide for Preparation of Metallographic Specimens

    E4 Practices for Force Verification of Testing Machines

    E6 Terminology Relating to Methods of Mechanical Testing

    E8/E8M Test Methods for Tension Testing of Metallic Materials

    E9 Test Methods of Compression Testing of Metallic Materials at Room Temperature

    E83 Practice for Verification and Classification of Extensometer Systems

    E111 Test Method for Youngs Modulus, Tangent Modulus, and Chord Modulus

    E112 Test Methods for Determining Average Grain Size

    E143 Test Method for Shear Modulus at Room Temperature

    E209 Practice for Compression Tests of Metallic Materials at Elevated Temperatures with Conventional or Rapid Heating Rates and Strain Rates

    E467 Practice for Verification of Constant Amplitude Dynamic Forces in an Axial Fatigue Testing System

    E606/E606M Test Method for Strain-Controlled Fatigue Testing

    E1012 Practice for Verification of Testing Frame and Specimen Alignment Under Tensile and Compressive Axial Force Application

    E1417/E1417M Practice for Liquid Penetrant Testing

    E1444/E1444M Practice for Magnetic Particle Testing

    E1823 Terminology Relating to Fatigue and Fracture Testing

    E2624 Practice for Torque Calibration of Testing Machines

    ICS Code

    ICS Number Code 19.060 (Mechanical testing)

    UNSPSC Code

    UNSPSC Code

    Referencing This Standard
    Link Here
    Link to Active (This link will always route to the current Active version of the standard.)

    DOI: 10.1520/E2207-15R21

    Citation Format

    ASTM E2207-15(2021), Standard Practice for Strain-Controlled Axial-Torsional Fatigue Testing with Thin-Walled Tubular Specimens, ASTM International, West Conshohocken, PA, 2021, www.astm.org

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