 This research paper examined the mechanical properties of a light composite material used in automotive applications. It focused on crack propagation in the material during dynamic loading, which is important for passenger safety. The study included both experimental and numerical analyses of the material's behavior under stress. The results showed that the material exhibited significant deformations when subjected to high loads, leading to cracks forming along the path of maximum strain. A finite element method, Them, was then used to analyze the material's behavior and predict the direction of crack propagation. The results confirmed the experimental findings and provided valuable insight into how to design safer automobile components, made from this type of material. This article was authored by Michael Petru, Josef Bronsek, Petr Lepsik, and others. We are article.tv, links in the description below.