Knowledge Base
The three-point bend testing provides values for the modulus of elasticity in bending and the flexural stress–strain properties of the material being tested. One advantage of three-point flexural testing over other methods is the ease of the specimen preparation. Very little preparation is usually required for a bend/flex tester. A deflection coil may also be implemented and placed under the sample being tested to give a more accurate measurement of displacement versus just measuring the displacement of the crosshead travel. Four-point bend testing is similar, the major difference is that the addition of a fourth loading point brings a much larger portion of the beam to the maximum stress. This is most noticeable when studying brittle materials.
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United’s Universal Testing Machines can help you with these and many other Bend & Flex testing standards
| ASTM A370 – Tensile Bend Strength Steel Test Equipment |
| ASTM C1018 – Fiber Reinforced Concrete Flexural Toughness Equipment |
| ASTM C1161 – Flexural Bend Ceramics Test Equipment |
| ASTM C1499 – Equibiaxial Flexural Ceramics Test Equipment |
| ASTM C158 – Flexural Bend Testing for Glass |
| ASTM C393 – Flexural Sandwich Composites Test Equipment |
| ASTM C580 – Flexural Modulus Elasticity Mortar Grout Polymer Concretes Test Equipment |
| ASTM C947 – Flexural Bend Glass Fiber Reinforced Concrete Test Equipment |
| ASTM D143 – Timber Clear Specimen Test Equipment |
| ASTM D2344 – Short-beam testing of polymer matrix composite materials |
| ASTM D6272 – Four Point Flexural Bend Test Machine for Plastics and Insulating Materials |
| ASTM D7249 – Facing of Sandwich Testing by Long Beam Flexure Equipment |
| ASTM D790 – Testing for Flexural Properties of Plastics and Insulating Materials |
| ASTM F394 – Biaxial Flexure Strength (Modulus of Rupture) of Ceramic Substrates |
| ISO 178 – 3 Point Bend of Plastics | Flexural Test Machines & Equipment |
| ISO 6872 – Flexural Strength Dentistry Ceramics |
| ISO 7438 – Bend Testing of Metal |
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