The 4-point alternating flexure test according to EN 12697-24 D and EN 12697-26 B is performed for the determination of resistance to fatigue and of stiffness.
HB servo-hydraulic testing machines have the testing actuator mounted on the upper crosshead, making them extremely versatile in use, especially in conjunction with the optional T-slot platform, which enables flexure and component testing in addition to standard tests.
Servo-hydraulic testing actuators are used in materials and component testing to reproduce precise, pre-determined forces and travel. They can be integrated into a load frame (Models HA, HB, HC) or mounted on a platform as a single testing actuator.