DIN EN ISO 14125 Bending test (accredited)

In our testing laboratory, accredited tests are performed according to DIN EN ISO 14125. The standard describes the determination of the flexural properties of fibre-reinforced plastics using a three-point or four-point bending test under static loading conditions. Key parameters determined include flexural strength, flexural modulus, deflection, and failure behaviour.

The test enables a detailed evaluation of the mechanical behaviour of fibre-reinforced composites depending on fibre type, fibre content, and laminate structure. The resulting characteristic values are used for material characterization, structural design, and quality control. Typical applications are found in lightweight construction, automotive engineering, plant and mechanical engineering, as well as structural components made of glass- or carbon-fibre-reinforced plastics.

Test Procedure

For testing, standardized specimens made of the respective fibre-reinforced composite material are prepared and conditioned under defined climatic conditions. The specimens are then mounted in a bending test fixture and loaded using either a three-point or four-point bending configuration. The force is applied via a central loading nose at a constant crosshead speed, while the specimen is supported on two supports (three-point bending) or four defined support points (four-point bending).

During loading, the resulting deflection is continuously recorded, and the force-displacement curve is measured until fracture or until a defined end condition is reached. Flexural strength and flexural modulus are then calculated from the recorded data.