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Homepage>ASTM Standards>ASTM D7905_D7905M-19E01 - Standard Test Method for Determination of the Mode II Interlaminar Fracture Toughness of Unidirectional Fiber-Reinforced Polymer Matrix Composites
Released: 2019-11-06

ASTM D7905_D7905M-19E01

Standard Test Method for Determination of the Mode II Interlaminar Fracture Toughness of Unidirectional Fiber-Reinforced Polymer Matrix Composites

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Language:English
Released:2019-11-06
Pages:18
Standards number:ASTM D7905_D7905M-19E01
Standard number:D7905_D7905M-19E01
Released:15.03.2019
Status:Active
Pages:18
Section:15.03
Keywords:composite materials; delamination; end notched flexure; ENF; interlaminar fracture toughness; mode II; shear;
DESCRIPTION

1.1 This test method covers the determination of the mode II interlaminar fracture toughness, GIIc, of unidirectional fiber-reinforced polymer matrix composite laminates under mode II shear loading using the end-notched flexure (ENF) test (Fig. 1).

FIG. 1 ENF Test Fixture and Specimen Nomenclature

ENF Test Fixture and Specimen NomenclatureENF Test Fixture and Specimen Nomenclature

1.2 This method is limited to use with composites consisting of unidirectional carbon-fiber- and glass-fiber-reinforced laminates. This limited scope reflects the experience gained in round robin testing. This test method may prove useful for other types and classes of composite materials; however, certain interferences have been noted (see Section 6).

1.3 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.

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

1.4 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.

1.5 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.

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