The ARAMIS system by GOM is one of the most useful tools in the Materials Process Components Lab of the ESA. It is used to see deformation caused by dynamic interactions on a part or component of a mechanical system. The measuring system helps the scientists in the lab to inspect or test parts that go on rockets or it simply enables them to study how different elements move. One of the key application of ARAMIS is to make deformations on parts due to uneven temperatures visible for researchers and scientists.
It is explained in the video that temperature in space is very unstable, since when an object is facing the sun it is very hot and when it is not, it is very cold. One of the key tests with the sensor is to evaluate how the components react. So it is possible to predict how and where they are going to fail and ensure optimal conditions when using for actual launchers.
In the specific example shown in the video, ARAMIS was used to find a problem with a set of bearings that were heavily strained in rocket preparation over the course of a few years. The researchers wanted to know where the load that caused the wheels to degrade was coming from. After testing with the ARAMIS they found that the maximum lateral load that each wheel could handle was actually less than 12 tons compared to the design requirement of 40 tons. This made them realize that the safety levels for the material were low causing it to get damaged a lot faster than it was supposed to.