ASTM-D6415 Historical Revision Information
Standard Test Method for Measuring the Curved Beam Strength of a Fiber-Reinforced Polymer-Matrix Composite

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


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

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 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.

1.4 The values stated in SI units are to be regarded standard. The values given in parentheses are provided for information purposes only.


composite materials; curved beam; curved beam strength; interlmainar tensile strength; out-of-plane tension; through-the-thickness strength; ICS Number Code 83.120 (Reinforced plastics)

To find similar documents by ASTM Volume:

15.03 (Space Simulation; Aerospace and Aircraft; Composite Materials)

To find similar documents by classification:

83.120 (Reinforced plastics Materials for the reinforcement of plastics, see 59.100)

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Document Number


Revision Level




Modification Type

Editorially changed

Publication Date

May 10, 1999

Document Type

Test Method

Page Count

8 pages

Committee Number