A servohydraulic fatigue testing machine is usually used to
perform a fatigue test. This consists of a hydraulically operated actuator
fitted into a high stiffness load frame to apply the load to the specimen.
Because the system is hydraulically operated, it is possible to achieve both
high loads and high cyclic frequencies.
The test system should be fitted with a control system that is
capable of controlling the test and measuring data at high frequencies.
It is also important that the load measurement system can accurately measure
specimen load, and compensate for load errors induced by the dynamic movement
of the test system.
Some typical materials that are subjected to fatigue testing:
- Structural Components
The following ASTM standards apply to fatigue testing: