ASTM D3518 / D3518M - 13

    Standard Test Method for In-Plane Shear Response of Polymer Matrix Composite Materials by Tensile Test of a ±45° Laminate

    Active Standard ASTM D3518 / D3518M | 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 in-plane shear property data for material specifications, research and development, quality assurance, and structural design and analysis. 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 and overall thickness, specimen preparation, specimen conditioning, environment of testing, specimen alignment and gripping, speed of testing, time at temperature, void content, and volume percent reinforcement. Properties that may be derived from this test method include the following:

    5.1.1 In-plane shear stress versus shear strain response,

    5.1.2 In-plane shear chord modulus of elasticity,

    5.1.3 Offset shear properties,

    5.1.4 Maximum in-plane shear stress for a ±45° laminate, and

    5.1.5 Maximum in-plane engineering shear strain for a ±45° laminate.

    1. Scope

    1.1 This test method determines the in-plane shear response of polymer matrix composite materials reinforced by high-modulus fibers. The composite material form is limited to a continuous-fiber-reinforced composite ±45° laminate capable of being tension tested in the laminate x direction.

    1.2 The values stated in either SI units or inch-pound units are to be regarded separately as standard. Within the text the inch-pound units are shown in brackets. The values stated in each system are not exact equivalents; therefore, each system must be used independently of the other. Combining values from the two systems may result in nonconformance with the standard.

    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 and health practices and determine the applicability of regulatory limitations prior to use.


    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

    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

    E6 Terminology Relating to Methods of Mechanical Testing

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

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

    E456 Terminology Relating to Quality and Statistics

    E1309 Guide for Identification of Fiber-Reinforced Polymer-Matrix Composite Materials in Databases

    E1434 Guide for Recording Mechanical Test Data of Fiber-Reinforced Composite Materials in Databases

    E1471 Guide for Identification of Fibers, Fillers, and Core Materials in Computerized Material Property Databases


    ICS Code

    ICS Number Code 49.025.40 (Rubber and plastics)

    UNSPSC Code

    UNSPSC Code


    DOI: 10.1520/D3518_D3518M

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