4-Point Alternating Flexure Test

The 4-point alternating flexure test to EN 12697-24, Annex D and EN 12697-26, Annex B is used to determine fatigue resistance and dynamic stiffness. It is the standard test method in the Netherlands.

The test device has frictionless, wear-free flexure pivots which adjust to the movement of the specimen, while the clamps feature motorized compensation adjustment and possess the necessary freedom of movement. An inductive displacement transducer measures deflection on the underside of the specimen. The device is designed for test loads up to 5kN and deflections up to a maximum of ±0.5 mm. Specimen dimensions are 450 mm x 50 mm x 50 mm or 450 mm x 70 mm x 70 mm. Special versions are available on enquiry. Dynamic calibration with reference specimens ensures high accuracy, even at high testing frequencies.