Fracture propagation captured by high-speed camera 2: Video (configuration 4)

<p>The video presents the target plate captured by high-speed camera 2 during testing, and shows the damage for configuration 4. A line can be observed between the first and the third impact and a lighter one between the second and third impact. A deeper analysis of the three enlarged holes highlights the location of crack tips and the crack between the first and&nbsp;the third hole. The line between impact 1 and 3 corresponds, to a full crack formation on the plate. On the contrary, there is only an initiation of&nbsp;crack formation between impacts 2 and 3.</p>