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ASTM D2344/D2344M-00(2006)

Historical Reaffirmation

Standard Test Method for Short-Beam Strength of Polymer Matrix Composite Materials and Their Laminates

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1.1 This test method determines the short-beam strength of high-modulus fiber-reinforced composite materials. The specimen is a short beam machined from a curved or a flat laminate up to 6.00 mm [0.25 in.] thick. The beam is loaded in three-point bending.

1.2 Application of this test method is limited to continuous- or discontinuous-fiber-reinforced polymer matrix composites, for which the elastic properties are balanced and symmetric with respect to the longitudinal axis of the beam.

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.

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 may not be 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.


In most cases, because of the complexity of internal stresses and the variety of failure modes that can occur in this specimen, it is not generally possible to relate the short-beam strength to any one material property. However, failures are normally dominated by resin and interlaminar properties, and the test results have been found to be repeatable for a given specimen geometry, material system, and stacking sequence (4).

Short-beam strength determined by this test method can be used for quality control and process specification purposes. It can also be used for comparative testing of composite materials, provided that failures occur consistently in the same mode (5).

This test method is not limited to specimens within the range specified in Section 8, but is limited to the use of a loading span length-to-specimen thickness ratio of 4.0 and a minimum specimen thickness of 2.0 mm [0.08 in.].

SDO ASTM: ASTM International
Document Number D2344
Publication Date Jan. 15, 2006
Language en - English
Page Count 8
Revision Level 00(2006)
Supercedes
Committee D30.04
Publish Date Document Id Type View
July 15, 2022 D2344_D2344M-22 Revision
July 1, 2016 D2344_D2344M-16 Revision
Oct. 1, 2013 D2344_D2344M-13 Revision
March 10, 2000 D2344_D2344M-00E01 Revision
Jan. 15, 2006 D2344_D2344M-00R06 Reaffirmation