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The ASTM D790 is the most common flexural test performed on plastic. Common measurements are flexural strength and flexural modulus. The test is performed on a Universal Testing Machine equipped with a 3 point bend fixture. Read more here: https://www.admet.com/testing-applica... • Testing the Flexural Properties of Plastics • Summary of Test • ASTM D790 is one of the most commonly used specifications in the plastics industry. This test measures the flexural strength and flexural modulus of reinforced and unreinforced plastics. These calculations relate to the stiffness of your material and allow you to choose materials that do not bend when supporting the loads you require for your application. The test uses a universal testing machine and a three point bend fixture to bend plastic test bars to acquire the data needed to make the calculations. • CLICK TO CONTACT US • Or call us at (800) 667-3220 • Test Procedure • To run the test, begin by die cutting, sawing, or injection molding your samples to a shape specified in the ASTM specification. • Adjust the support span length that you find in the standard determined by your sample size • Place the test bar on the 3 point bend fixture and begin the test • End the test after bending to 5% strain or until the sample breaks • Equipment Required for ASTM D790 • A Universal Testing Machine with the following specifications: • Servo-control to ensure constant rate of speed • Meets accuracy of testing machines specified in ASTM E4 • ADMET Recommends: eXpert 2600 Dual Column Testing Machine, eXpert 7600 Single Column Testing Machine • Deflection measuring device • This can be the standard crosshead movement indicator or an auxiliary deflection measuring device such as a displacement transducer • ADMET Recommends: Deflectometers • Software or suitable electronics are required to operate the machine and to take the measurements • Basic systems will provide the raw data and stress-strain charts. Using these data, you can determine and calculate all of the analyses needed. Fully PC-based systems have the capability to calculate all of these automatically. ADMET offers both • ADMET Recommends: MTESTQuattro PC-based Controller • Three Point Bend Fixture • There are many different styles of bend fixtures available. Select one appropriate for the capacity and size of your samples • ADMET Recommends: 3 Point Bend Fixture • For more information on Bend Test Equipment, read our blog post here: https://www.admet.com/bend-testing-eq...

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