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    ASTM D5379 / D5379M - 19e1

    Standard Test Method for Shear Properties of Composite Materials by the V-Notched Beam Method

    Active Standard ASTM D5379 / D5379M | Developed by Subcommittee: D30.04

    Book of Standards Volume: 15.03

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    Significance and Use

    5.1 This test method is designed to produce shear property data for material specifications, research and development, quality assurance, and structural design and analysis. Either in-plane or interlaminar shear properties may be evaluated, depending upon the orientation of the material coordinate system relative to the loading axis. Factors that influence the shear response and should therefore be reported include the following: material, methods of material preparation and lay-up, specimen stacking sequence, specimen preparation, specimen conditioning, environment of testing, specimen alignment and gripping, speed of testing, time at temperature, void content, and volume percent reinforcement.

    5.2 In anisotropic materials, properties may be obtained in any of the six possible shear planes by orienting the testing plane of the specimen with the desired material plane (1-2 or 2-1, 1-3 or 3-1, 2-3 or 3-2). Only a single shear plane may be evaluated for any given specimen. Properties, in the test direction, which may be obtained from this test method, include the following:

    5.2.1 Shear stress/strain response,

    5.2.2 Ultimate strength,

    5.2.3 Ultimate strain, and

    5.2.4 Shear chord modulus of elasticity.

    1. Scope

    1.1 This test method covers the shear properties of composite materials reinforced by high-modulus fibers. The composite materials are limited to continuous-fiber or discontinuous-fiber-reinforced composites in the following material forms:

    1.1.1 Laminates composed only of unidirectional fibrous laminae, with the fiber direction oriented either parallel or perpendicular to the loading axis.

    1.1.2 Laminates composed only of woven fabric filamentary laminae with the warp direction oriented either parallel or perpendicular to the loading axis.

    1.1.3 Laminates composed only of unidirectional fibrous laminae, containing equal numbers of plies oriented at 0 and 90° in a balanced and symmetric stacking sequence, with the 0° direction oriented either parallel or perpendicular to the loading axis.

    1.1.4 Short-fiber-reinforced composites with a majority of the fibers being randomly distributed.

    Note 1: This shear test concept was originally developed without reference to fiber direction for use on isotropic materials such as metals or ceramics.

    1.2 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.

    1.2.1 Within the text, the inch-pound units are shown in brackets.

    1.3 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.

    1.4 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

    D792 Test Methods for Density and Specific Gravity (Relative Density) of Plastics by Displacement

    D883 Terminology Relating to Plastics

    D2584 Test Method for Ignition Loss of Cured Reinforced Resins

    D2734 Test Methods for Void Content of Reinforced Plastics

    D3171 Test Methods for Constituent Content of 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

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

    E122 Practice for Calculating Sample Size to Estimate, With Specified Precision, the Average for a Characteristic of a Lot or Process

    E177 Practice for Use of the Terms Precision and Bias in ASTM Test Methods

    E251 Test Methods for Performance Characteristics of Metallic Bonded Resistance Strain Gages

    E456 Terminology Relating to Quality and Statistics

    E1237 Guide for Installing Bonded Resistance Strain Gages

    Other Documents

    ANSI/ASME B 46.1-1985 Surface Texture (Surface Roughness, Waviness, and Lay)

    ANSI Y14.5M-1982 Geometric Dimensioning and Tolerancing

    ICS Code

    ICS Number Code 83.140.20 (Laminated sheets)

    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/D5379_D5379M-19E01

    Citation Format

    ASTM D5379 / D5379M-19e1, Standard Test Method for Shear Properties of Composite Materials by the V-Notched Beam Method, ASTM International, West Conshohocken, PA, 2019, www.astm.org

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