The specimen is preferably molded and designed with beads, then clamped into stainless steel jaws.
Rubber strips can be as well tested by using dedicated jaws.
A CCD video camera is used to record periodic photos of the crack and to determine accurately the crack tip position.
The motorized video camera makes possible to scan the entire width of the specimen, and to follow up to 4 cracks in one single experiment with an extended unmatched accuracy inferior to +/- 2µm.
The crack growth test may be performed automatically without operator’s intervention and ends automatically according to various predefined criterions (cycles numbers, crack growth rate stabilization, crack deviation, crack max length, …).