ASTM D7264/D7264M-15
Standard Test Method for Flexural Properties of Polymer Matrix Composite Materials

Standard No.

ASTM D7264/D7264M-15

Release Date

2015

Published By

American Society for Testing and Materials (ASTM)

Status

Be replaced

Replace By

ASTM D7264/D7264M-21

Latest

ASTM D7264/D7264M-21

Scope

5.1 This test method determines the flexural properties (including strength, stiffness, and load/deflection behavior) of polymer matrix composite materials under the conditions defined. Procedure A is used for three-point loading and Procedure B is used for four-point loading. This test method was developed for optimum use with continuous-fiber-reinforced polymer matrix composites and differs in several respects from other flexure methods, including the use of a standard span-to-thickness ratio of 32:1 versus the 16:1 ratio used by Test Methods D790 (a plastics-focused method covering three-point flexure) and D6272 (a plastics-focused method covering four-point flexure).

5.2 This test method is intended to interrogate long-beam strength in contrast to the short-beam strength evaluated by Test Method D2344/D2344M.

5.3 Flexural properties determined by these procedures can be used for quality control and specification purposes, and may find design applications.

5.4 These procedures can be useful in the evaluation of multiple environmental conditions to determine which are design drivers and may require further testing.

5.5 These procedures may also be used to determine flexural properties of structures.

1.1 This test method determines the flexural stiffness and strength properties of polymer matrix composites.

1.1.1 Procedure A—A three-point loading system utilizing center loading on a simply supported beam.

1.1.2 Procedure B—A four-point loading system utilizing two load points equally spaced from their adjacent support points, with a distance between load points of one-half of the support span.

Note 1: Unlike Test Method D6272, which allows loading at both one-third and one-half of the support span, in order to standardize geometry and simplify calculations this standard permits loading at only one-half the support span.

1.2 For comparison purposes, tests may be conducted according to either test procedure, provided that the same procedure is used for all tests, since the two procedures generally give slightly different property values.

1.3 The values stated in either SI units or inch-pound units are to be regarded separately as standard. Within the text, the inch-pound units are shown in brackets. The values stated in each system are not 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.

1.4 This standard does no......

ASTM D7264/D7264M-15 Referenced Document

• ASTM D2344/D2344M Standard Test Method for Short-Beam Strength of Polymer Matrix Composite Materials and Their Laminates
• ASTM D3878 Standard Terminology Composite Materials
• ASTM D5229/D5229M Standard Test Method for Moisture Absorption Properties and Equilibrium Conditioning of Polymer Matrix Composite Materials
• ASTM D5687/D5687M Standard Guide for Preparation of Flat Composite Panels with Processing Guidelines for Specimen Preparation
• ASTM D6272 Standard Test Method for Flexural Properties of Unreinforced and Reinforced Plastics and Electrical Insulating Materials by Four-Point Bending
• ASTM D6856 Standard Guide for Testing Fabric-Reinforced "Textile" Composite Materials
• ASTM D790 Standard Test Methods for Flexural Properties of Unreinforced and Reinforced Plastics and Electrical Insulating Materials*， 2024-04-20 Update
• ASTM E122 Standard Practice for Calculating Sample Size to Estimate, With a Specified Tolerable Error, the Average for Characteristic of a Lot or Process
• ASTM E1309 Standard Guide for Identification of Fiber-Reinforced Polymer-Matrix Composite Materials in Databases
• ASTM E1434 Standard Guide for Recording Mechanical Test Data of Fiber-Reinforced Composite Materials in Databases
• ASTM E177 Standard Practice for Use of the Terms Precision and Bias in ASTM Test Methods
• ASTM E18 Standard Test Methods for Rockwell Hardness of Metallic Materials
• ASTM E4 Standard Practices for Force Verification of Testing Machines
• ASTM E456 Standard Terminology for Relating to Quality and Statistics
• ASTM E6 Standard Terminology Relating to Methods of Mechanical Testing

ASTM D7264/D7264M-15 history

• 2021 ASTM D7264/D7264M-21 Standard Test Method for Flexural Properties of Polymer Matrix Composite Materials
• 2015 ASTM D7264/D7264M-15 Standard Test Method for Flexural Properties of Polymer Matrix Composite Materials
• 2007 ASTM D7264/D7264M-07 Standard Test Method for Flexural Properties of Polymer Matrix Composite Materials
• 2006 ASTM D7264/D7264M-06 Standard Test Method for Flexural Properties of Polymer Matrix Composite Materials