ASTM D7264 Test Fixture
ASTM D7264 Testing Fixture
ASTM D7264 – This test method determines the flexural properties (including strength, stiffness, and load/deflection behavior) of polymer matrix composite
materials under the conditions defined.
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- Description
- TECHNICAL SPECIFICATIONS
Description
ASTM D7264 – Standard Test Method for Flexural Properties of Polymer Matrix Composite Materials
ASTM D7264 Testing Fixture
ASTM D7264 – 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.
Procedure A—A three-point loading system utilizing center loading on a simply supported beam.
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.
Flexural properties determined by these procedures can be used for quality control and specification purposes, and may find design applications.
These procedures can be useful in the evaluation of multiple environmental conditions to determine which are design drivers and may require further testing.
These procedures may also be used to determine flexural properties of structures.
ASTM D 7264 recommends a specimen span length-to-tickness ratio of 32:1, but permits use of the other ratios as well.
For a typical 0.1″ thick specimen and a commonly used span length-to-thickness ratio of 16:1, this corresponds to a support span of 1.6″, with at least an additional
10 percent (0.25″ minimum) specimen overhang at each end being specified in the standards.
To accommodate various types of materials, specimen thicknesses, and span length-to-thickness ratios, the support span length of the fixture is infinitely adjustable
over the full range of span lengths up to 8″.
Referenced Documents
ASTM Standards
D790 Test Methods for Flexural Properties of Unreinforced and Reinforced Plastics and Electrical Insulating Materials
D2344/D2344M Test Method for Short-Beam Strength of Polymer Matrix Composite Materials and Their Laminates
D3878 Terminology for Composite Materials
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