ASTM-D6415/D6415M:2022 Edition(Redline)

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D6415/D6415M-22 Standard Test Method for Measuring the Curved Beam Strength of a Fiber-Reinforced Polymer-Matrix Composite (Redline)

Published By	Publication Date	Number of Pages
ASTM	2022

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Description

ASTM D6415/D6415M-22

Redline Standard: Standard Test Method for Measuring the Curved Beam Strength of a Fiber-Reinforced Polymer-Matrix Composite

ASTM D6415/D6415M

Scope

1.1 This test method determines the curved beam strength of a continuous fiber-reinforced composite material using a 90° curved beam specimen (Figs. 1 and 2). The curved beam consists of two straight legs connected by a 90° bend with a 6.4 mm [0.25 in.] inner radius. An out-of-plane (through-the-thickness) tensile stress is produced in the curved region of the specimen when force is applied. This test method is limited to use with composites consisting of layers of fabric or layers of unidirectional fibers.

FIG. 1 Test Specimen Geometry (SI units)

FIG. 2 Test Specimen Geometry (inch-pound)

1.2 This test method may also be used to measure the interlaminar tensile strength if a unidirectional specimen is used where the fibers run continuously along the legs and around the bend.

1.3 This test method is limited to use with composites consisting of layers of fabric or layers of unidirectional fibers.

1.4 Units—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.

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

1.5 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.

1.6 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.

Keywords

composite materials; curved beam; curved beam strength; interlaminar tensile strength; out-of-plane tension; through-the-thickness strength;

ICS Code

ICS Number Code 83.120 (Reinforced plastics)

DOI: 10.1520/D6415_D6415M-22

Additional information

Standard Title	D6415/D6415M-22 Standard Test Method for Measuring the Curved Beam Strength of a Fiber-Reinforced Polymer-Matrix Composite (Redline)
Published Code	ASTM
Publication Date	2022