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Home » Testing Solutions » By Material » Composites » Flexure » ISO 14125 Reinforced Plastic Composites

ISO 14125 Flexural Properties of Fiber-Reinforced Plastic Composites

Standard

  • ISO 14125

Materials

  • Plastics
  • Composites

Specimen

  • Rectangular
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ISO 14125 is a test method to determine flexure properties of fiber-reinforced plastic composites. There are two methods used, Method A for a three-point flexure test and Method B for a four-point flexure test. There are four material classes, Class I – IV, which define the specimen length, span, width, and thickness. The standard requires deflection measurement not exceed +/- 1% error of full scale. The 2810-400 bend fixture is fully compliant with these requirements.

The challenges of testing to this standard:

  • Flexural strain measurement
  • Repeatability of calculations
  • Reporting calculations in compliance with the standard

Our solution:

  • Flexural strain measurement – There are two methods for reporting strain that are compliant with ISO 14125: a clip-on extensometer attached to a deflectometer plunger, or the AutoX - both options offer the accuracy to measure flexural modulus.
  • Repeatability of calculations – When setting up the test, having an adequate preload is highly recommended to ensure accurate and consistent strain measurements. How much force is applied to the specimen prior to starting the test directly impacts the repeatability of calculations such as flexural modulus. Alternatively, a slack correction, also referred to as a tow compensation, can be used to ensure that the calculations are performed on the appropriate section of the testing data.
  • Reporting calculations in compliance with the standard – Bluehill® Universal testing software has advanced pre-built methods available with pre-configured plastic specific calculations helping to ensure compliance.

For labs with a high volume of testing, Instron® offers a 6-axis robotic system (AT6), and non-robotic 3-axis system (AT3).

It is important to review ISO 14125 in order to fully understand the test setup, procedure, and results requirements.

2810-400 Flexure Fixture

The 2810-400 flexure fixture allows a variety of flexural tests to be performed, including determination of flexural modulus,flexural strength and flexural yield strength. Easy-to-install, the three-point fixture can be modified with an optional conversion kit to provide a four-point bending conversion

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5900 Series Premier Testing Systems Brochure

5900 Universal Testing Systems are engineered for precision, built for durability, and offer the flexibility for changing requirements. They are designed with standard and optional features that increase testing efficiency and improve the testing experience for the operator. A wide range of models are available for testing capacities from < 100N up to 600kN.

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  • 1/22/2019
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3300 Series - Affordable Testing Solutions

Instron 3300 Series Universal Testing Systems for Tensile, Compression, Bend, and other material property tests.

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  • 6/19/2017
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Bluehill Universal Brochure

Bluehill Universal Software is built from the ground-up for touch interaction and an intuitive user experience. Discover simpler and smarter testing with features such as pre-loaded test methods, QuickTest in seconds, enhanced data exporting: and Instron Connect – a new feature that provides a direct communication link to Service. Users of previous versions of software such as Bluehill 2 and Bluehill 3 can easily upgrade to the newest version of Bluehill.

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  • 2/26/2017
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Automated Specimen Handling Systems

Available for tensile, flexural, and compression testing, Instron® TestMaster Automated Testing Solutions can improved the safety and productivity of testing for a wide range of materials and specimen sizes.

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  • 4/16/2018
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