vierpunkt The flexural test using DIN EN ISO 14125 is a 3-/ 4-Point-flexural test for the characterization of flexural properties of fibre reinforced composite materials. The test is conducted at constant speed until failure or a given deformation, while load and deformation are monitored. The rectangular and flat samples of continuous fibre reinforced thermosettings or thermoplasts (unreinforced, filled or short fibre reinforced: see ISO 178) can be manufactured out of the center piece of standard multi-purpose specimen.

The 4-point flexural test provides a constant distribution of strain and deformation between the two loading pins which produces a smaller maximum shear stress in comparison to the 3-point flexural test.

Please note: Method is not applicable for determination of characteristic values. It can only be used for comparative material testing or quality check.