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ASTM D5379/D5379M-19
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ASTM D5379/D5379M-19 Standard Test Method for Shear Properties of Composite Materials by the V-Notched Beam Method
standard by ASTM International, 10/15/2019
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Full Description
1.1This 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:
1.1.1Laminates composed only of unidirectional fibrous laminae, with the fiber direction oriented either parallel or perpendicular to the loading axis.
1.1.2Laminates composed only of woven fabric filamentary laminae with the warp direction oriented either parallel or perpendicular to the loading axis.
1.1.3Laminates 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.
1.1.4Short-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.
1.2The 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.
1.2.1Within the text, the inch-pound units are shown in brackets.
1.3This 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.
1.4This 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.