A fatigue test is done to determine an object’s ability to resist cyclic fatigue loading conditions. In this test, repeated loading and unloading forces are applied into the material, often at least matching the level of forces being applied to the object on where it’s planned to be used. The forces can be in the form of tension, torsion, compression, bending, or even a combination of these forces as deemed appropriate. The most common forces applied in fatigue tests is alternating tension and compression. To perform the fatigue test, the material is placed in the testing machine, and then subjected to cycles of loading and unloading, often up to failure is reached.